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• Using ASP.NET Membership Provider with an ACL

  - by geekrutherford

  Up until recently one of my applications has used the membership provider within ASP.NET exclusively. However, it has been proposed that while the currently defined roles are beneficial, security needs to be more granular to restrict both access to certain pages and functionality present within a given page.   Unfortunately, the role based security ASP.NET gives you out of the box falls down in this area. This is not due to a lack of foresight by Microsoft, but rather it was simply not designed for implementing both role based security and any inherent ACL you may define within these roles. Mind you some would say an ACL is independent of the role to which a user belongs and is assigned to the user directly.   The application mentioned here has it's own User object (which encapsulates the membership provider user object as a property) and SQL Server table to store extended information not present in the aspnet_users table. While I could have modified the aspnet membership schema to suit the applications needs, it seemed smarter to simply create a separate table with a foreign key back to the aspnet_users table.   Since I have a separate object to store extended user information, I simply created an ACL object and expose it as a property of my user object.   This is all well and good, but it does not help in regards to the SiteMapProvider and restricting access at the page level based on the users ACL.   The straightforward answer would be to develop some code within the databound event for the menu that checks the page title and has hardcoded logic that dictates a user must have certain permissions turned on. The problem with this approach is that it's HARDCODED!!! If you need to change access to a page you'd need to do a build and go through your normal deployment process....ugh!!!   An alternative method, albeit not perfect, is to utilize the resourceKey property on the SiteMapNodes in the SiteMap file with the name of the required permission to view the page. Within the databound event for your menu you iterate the SiteMapNodes in the menus SiteMapProvider looking for a match at the page level based on title. When a match is detected, you have a switch/case on the SiteMapNodes resourceKey (the name of the ACL permission required). The case for the resourceKey ensures the users ACL permission is turned on and viola!!!   This is noteably not perfect in that it is using the resourceKey in a manner other than intended.  Since the application is not localized, using it in the manner described it not an issue.   Below is a sample SiteMap file with the resourceKey used as the ACL permission identifier:     Below is the ItemDataBound event. This application uses the Telerik Menu control:

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• How to Make Objects Fall Faster in a Physics Simulation

  - by David Dimalanta

  I used the collision physics (i.e. Box2d, Physics Body Editor) and implemented onto the java code. I'm trying to make the fall speed higher according to the examples: It falls slower if light object (i.e. feather). It falls faster depending on the object (i.e. pebble, rock, car). I decided to double its falling speed for more excitement. I tried adding the mass but the speed of falling is constant instead of gaining more speed. check my code that something I put under input processor's touchUp() return method under same roof of the class that implements InputProcessor and Screen: @Override public boolean touchUp(int screenX, int screenY, int pointer, int button) { // TODO Touch Up Event if(is_Next_Fruit_Touched) { BodyEditorLoader Fruit_Loader = new BodyEditorLoader(Gdx.files.internal("Shape_Physics/Fruity Physics.json")); Fruit_BD.type = BodyType.DynamicBody; Fruit_BD.position.set(x, y); FixtureDef Fruit_FD = new FixtureDef(); // --> Allows you to make the object's physics. Fruit_FD.density = 1.0f; Fruit_FD.friction = 0.7f; Fruit_FD.restitution = 0.2f; MassData mass = new MassData(); mass.mass = 5f; Fruit_Body[n] = world.createBody(Fruit_BD); Fruit_Body[n].setActive(true); // --> Let your dragon fall. Fruit_Body[n].setMassData(mass); Fruit_Body[n].setGravityScale(1.0f); System.out.println("Eggs... " + n); Fruit_Loader.attachFixture(Fruit_Body[n], Body, Fruit_FD, Fruit_IMG.getWidth()); Fruit_Origin = Fruit_Loader.getOrigin(Body, Fruit_IMG.getWidth()).cpy(); is_Next_Fruit_Touched = false; up = y; Gdx.app.log("Initial Y-coordinate", "Y at " + up); //Once it's touched, the next fruit will set to drag. if(n < 50) { n++; }else{ System.exit(0); } } return true; } And take note, at show() method , the view size from the camera is at 720x1280: camera_1 = new OrthographicCamera(); camera_1.viewportHeight = 1280; camera_1.viewportWidth = 720; camera_1.position.set(camera_1.viewportWidth * 0.5f, camera_1.viewportHeight * 0.5f, 0f); camera_1.update(); I know it's a good idea to add weight to make the falling object falls faster once I released the finger from the touchUp() after I picked the object from the upper right of the screen but the speed remains either constant or slow. How can I solve this? Can you help?

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• Exchange 2010, Exchange 2003 Mail Flow issue

  - by Ryan Roussel

  While performing the initial Exchange 2010 deployment for a customer migrating from Exchange 2003, I ran into an issue with mail flow between the two environments.  The Exchange 2003 mailboxes could send to Exchange 2010, as well as to and from the internet.  Exchange 2010 mailboxes could send and receive to the internet, however they could not send to Exchange 2003 mailboxes.   After scouring the internet for a solution, it seemed quite a few people were experiencing this issue with no resolution to be found, or at least not easily.  After many attempts of manually deleting and recreating the routing group connectors,  I finally lucked onto the answer in an obscure comment left to another blogger.   If inheritable permissions are not allowed on the Exchange 2003 object in the Active Directory schema, exchange server authentication cannot be achieved between the servers.   It seems when Blackberry Enterprise Server gets added to 2003 environments, a lot of Admins get tricky and add the BES Admin user explicitly to the server object  to allow  inheritance down from there to all mailboxes.  The problem is they also coincidently turn off inheritance to the server object itself from its parent containers.  You can re-establish inheritance without overwriting the existing ACL however so that the BES Admin can remain in the server object ACL.   By re-establishing inheritance to the 2003 server object, mail flow was instantly restored between the servers.    To re-establish inheritance: 1. Open ASDIedit by adding the snap-in to a MMC (should be included on your 2008 server where Exchange 2010 is installed) 2. Navigate to Configuration > Services > Microsoft Exchange > Exchange Organization > Administrative Groups > First Administrative Group > Servers 3. In the right pane, right click on the CN=Server Name of your Exchange 2003 Server, select properties 4. Navigate to the Security tab, hit advanced toward the bottom. 5. Check the checkbox that reads “include inheritable permissions” toward the bottom of the dialogue box.

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• Gettings Terms asscoiated to a Specific list item

  - by Gino Abraham

  I had a fancy requirement where i had to get all tags associated to a document set in a document library. The normal tag could webpart was not working when i add it to the document set home page, so planned a custom webpart. Was checking in net to find a straight forward way to achieve this, but was not lucky enough to get something. Since i didnt get any samples in net, i looked into Microsoft.Sharerpoint.Portal.Webcontrols and found a solution.The socialdataframemanager control in 14Hive/Template/layouts/SocialDataFrame.aspx directed me to the solution. You can get the dll from ISAPI folder. Following Code snippet can get all Terms associated to the List Item given that you have list name and id for the list item. using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.SharePoint; using Microsoft.Office.Server.SocialData; namespace TagChecker { class Program { static void Main(string[] args) { // Your site url string siteUrl = http://contoso; // List Name string listName = "DocumentLibrary1"; // List Item Id for which you want to get all terms int listItemId = 35; using (SPSite site = new SPSite(siteUrl)) { using(SPWeb web = site.OpenWeb()) { SPListItem listItem = web.Lists[listName].GetItemById(listItemId); string url = string.Empty; // Based on the list type the url would be formed. Code Sniffed from Micosoft dlls :) if (listItem.ParentList.BaseType == SPBaseType.DocumentLibrary) { url = listItem.Web.Url.TrimEnd(new char[] { '/' }) + "/" + listItem.Url.TrimStart(new char[] { '/' }); } else if (SPFileSystemObjectType.Folder == listItem.FileSystemObjectType) { url = listItem.Web.Url.TrimEnd(new char[] { '/' }) + "/" + listItem.Folder.Url.TrimStart(new char[] { '/' }); } else { url = listItem.Web.Url.TrimEnd(new char[] { '/' }) + "/" + listItem.ParentList.Forms[PAGETYPE.PAGE_DISPLAYFORM].Url.TrimStart(new char[] { '/' }) + "?ID=" + listItem.ID.ToString(); } SPServiceContext serviceContext = SPServiceContext.GetContext(site); Uri uri = new Uri(url); SocialTagManager mgr = new SocialTagManager(serviceContext); SocialTerm[] terms = mgr.GetTerms(uri); foreach (SocialTerm term in terms) { Console.WriteLine(term.Term.Labels[0].Value ); } } } Console.Read(); } } } Reference dlls added are Microsoft.Sharepoint , Microsoft.Sharepoint.Taxonomy, Microsoft.office.server, Microsoft.Office.Server.UserProfiles from ISAPI folder. This logic can be used to make a custom tag cloud webpart by taking code from OOB tag cloud, so taht you can have you webpart anywhere in the site and still get Tags added to a specifc libdary/List. Hope this helps some one.

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• Download files from a SharePoint site using the RSSBus SSIS Components

  - by dataintegration

  In this article we will show how to use a stored procedure included in the RSSBus SSIS Components for SharePoint to download files from SharePoint. While the article uses the RSSBus SSIS Components for SharePoint, the same process will work for any of our SSIS Components. Step 1: Open Visual Studio and create a new Integration Services Project. Step 2: Add a new Data Flow Task to the Control Flow screen and open the Data Flow Task. Step 3: Add an RSSBus SharePoint Source to the Data Flow Task. Step 4: In the RSSBus SharePoint Source, add a new Connection Manager, and add your credentials for the SharePoint site. Step 5: Now from the Table or View dropdown, choose the name of the Document Library that you are going to back up and close the wizard. Step 6: Add a Script Component to the Data Flow Task and drag an output arrow from the 'RSSBus SharePoint Source' to it. Step 7: Open the Script Component, go to edit the Input Columns, and choose all the columns. Step 8: This will open a new Visual Studio instance, with a project in it. In this project add a reference to the RSSBus.SSIS2008.SharePoint assembly available in the RSSBus SSIS Components for SharePoint installation directory. Step 9: In the 'ScriptMain' class, add the System.Data.RSSBus.SharePoint namespace and go to the 'Input0_ProcessInputRow' method (this method's name may vary depending on the input name in the Script Component). Step 10: In the 'Input0_ProcessInputRow' method, you can add code to use the DownloadDocument stored procedure. Below we show the sample code: String connString = "Offline=False;Password=PASSWORD;User=USER;URL=SHAREPOINT-SITE"; String downloadDir = "C:\\Documents\\"; SharePointConnection conn = new SharePointConnection(connString); SharePointCommand comm = new SharePointCommand("DownloadDocument", conn); comm.CommandType = CommandType.StoredProcedure; comm.Parameters.Clear(); String file = downloadDir+Row.LinkFilenameNoMenu.ToString(); comm.Parameters.Add(new SharePointParameter("@File", file)); String list = Row.ServerUrl.ToString().Split('/')[1].ToString(); comm.Parameters.Add(new SharePointParameter("@Library", list)); String remoteFile = Row.LinkFilenameNoMenu.ToString(); comm.Parameters.Add(new SharePointParameter("@RemoteFile", remoteFile)); comm.ExecuteNonQuery(); After saving your changes to the Script Component, you can execute the project and find the downloaded files in the download directory. SSIS Sample Project To help you with getting started using the SharePoint Data Provider within SQL Server SSIS, download the fully functional sample package. You will also need the SharePoint SSIS Connector to make the connection. You can download a free trial here. Note: Before running the demo, you will need to change your connection details in both the 'Script Component' code and the 'Connection Manager'.

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• Creating classed in JavaScript

  - by Renso

  Goal:Creating class instances in JavaScript is not available since you define "classes" in js with object literals. In order to create classical classes like you would in c#, ruby, java, etc, with inheritance and instances.Rather than typical class definitions using object literals, js has a constructor function and the NEW operator that will allow you to new-up a class and optionally provide initial properties to initialize the new object with.The new operator changes the function's context and behavior of the return statement.var Person = function(name) {   this.name = name;};   //Init the personvar dude= new Person("renso");//Validate the instanceassert(dude instanceof Person);When a constructor function is called with the new keyword, the context changes from global window to a new and empty context specific to the instance; "this" will refer in this case to the "dude" context.Here is class pattern that you will need to define your own CLASS emulation library:var Class = function() {   var _class = function() {      this.init.apply(this, arguments);   };   _class.prototype.init = function(){};   return _class;}var Person a new Class();Person.prototype.init = function() {};var person = new Person;In order for the class emulator to support adding functions and properties to static classes as well as object instances of People, change the emulator:var Class = function() {   var _class = function() {      this.init.apply(this, arguments);   };   _class.prototype.init = function(){};   _class.fn = _class.prototype;   _class.fn.parent = _class;   //adding class properties   _class.extend = function(obj) {      var extended = obj.extended;      for(var i in obj) {         _class[i] = obj[i];      };      if(extended) extended(_class);   };   //adding new instances   _class.include = function(obj) {      var included = obj.included;      for(var i in obj) {         _class.fn[i] = obj[i];      };      if(included) included(_class);   };   return _class;}Now you can use it to create and extend your own object instances://adding static functions to the class Personvar Person = new Class();Person.extend({   find: function(name) {/*....*/},      delete: function(id) {/*....*/},});//calling static function findvar person = Person.find('renso');   //adding properties and functions to the class' prototype so that they are available on instances of the class Personvar Person = new Class;Person.extend({   save: function(name) {/*....*/},   delete: function(id) {/*....*/}});var dude = new Person;//calling instance functiondude.save('renso');

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• why client can not receive message from server (java) [migrated]

  - by user1745931

  I have just started learning java. I modified the client side code for a server/client communication program, by creating two threads for the client side, main thread for receiving user's input, and inputThread for receiving server's response. I am sure that server has sent the response to client, however, no response message is obtain at client. Here is my code. Can anyone help me to figure it out? Thanks package clientnio; import java.net.*; import java.nio.*; import java.io.*; import java.nio.channels.*; import java.util.Scanner; public class ClientNIO { public static int bufferLen = 50; public static SocketChannel client; public static ByteBuffer writeBuffer; public static ByteBuffer readBuffer; public static void main(String[] args) { writeBuffer = ByteBuffer.allocate(bufferLen); readBuffer = ByteBuffer.allocate(bufferLen); try { SocketAddress address = new InetSocketAddress("localhost",5505); System.out.println("Local address: "+ address); client=SocketChannel.open(address); client.configureBlocking(false); //readBuffer.flip(); new inputThread(readBuffer); /* String a="asdasdasdasddffasfas"; writeBuffer.put(a.getBytes()); writeBuffer.clear(); int d=client.write(writeBuffer); writeBuffer.flip(); */ while (true) { InputStream inStream = System.in; Scanner scan = new Scanner(inStream); if (scan.hasNext()==true) { String inputLine = scan.nextLine(); writeBuffer.put(inputLine.getBytes()); //writeBuffer.clear(); System.out.println(writeBuffer.remaining()); client.write(writeBuffer); System.out.println("Sending data: "+new String(writeBuffer.array())); writeBuffer.flip(); Thread.sleep(300); } } } catch(Exception e) { System.out.println(e); } } } class inputThread extends Thread { private ByteBuffer readBuffer; public inputThread(ByteBuffer readBuffer1) { System.out.println("Receiving thread starts."); this.readBuffer = readBuffer1; start(); } @Override public void run() { try { while (true) { readBuffer.flip(); int i=ClientNIO.client.read(readBuffer); if(i>0) { byte[] b=readBuffer.array(); System.out.println("Receiving data: "+new String(b)); //client.close(); //System.out.println("Connection closed."); //break; } Thread.sleep(100); } } catch (Exception e) { System.out.println(e); } } }

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• Applying DDD principles in a RESTish web service

  - by Andy

  I am developing an RESTish web service. I think I got the idea of the difference between aggregation and composition. Aggregation does not enforce lifecycle/scope on the objects it references. Composition does enforce lifecycle/scope on the objects it contain/own. If I delete a composite object then all the objects it contain/own are deleted as well, while the deleting an aggregate root does not delete referenced objects. 1) If it is true that deleting aggregate roots does not necessary delete referenced objects, what sense does it make to not have a repository for the references objects? Or are aggregate roots as a term referring to what is known as composite object? 2) When you create an web service you will have multiple endpoints, in my case I have one entity Book and another named Comment. It does not make sense to leave the comments in my application if the book is deleted. Therefore, book is a composite object. I guess I should not have a repository for comments since that would break the enforcement of lifecycle and rules that the book class may have. However I have URL such as (examples only): GET /books/1/comments POST /books/1/comments Now, if I do not have a repository for comments, does that mean I have to load the book object and then return the referenced comments? Am I allowed to return a list of Comment entities from the BookRepository, does that make sense? The repository for Book may eventually become rather big with all sorts of methods. Am I allowed to write JPQL (JPA queries) that targets comments and not books inside the repository? What about pagination and filtering of comments. When adding a new comment triggered by the POST endpoint, do you need to load the book, add the comment to the book, and then update the whole book object? What I am currently doing is having a own CommentRepository, even though the comments are deleted with the book. I could need some direction on how to do it correct. Since you are exposing not only root objects in RESTish services I wonder how to handle this at the backend. I am using Hibernate and Spring.

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• Collision disturbing the jumping mechanic in java 2D game [on hold]

  - by user50931

  So I have been working on a 2D Java game recently and everything was going smoothly, until I reached a problem to do with the players jumping mechanic. So far I've got the player to jump a fixed rate and fall due to gravity. Hers my code for my Player class. public class Player extends GameObject { public Player(int x, int y, int width, int height, ObjectId id) { super(x, y, width, height, id); } @Override public void tick(ArrayList<GameObject> object) { if(go){ x+=vx; y+=vy; } if(vx <0){ facing =-1; }else if(vx >0) facing =1; checkCollision(object); checkStance(); } private void checkStance() { if(falling){ //gravity jumping = false; vy = speed/2; } if(jumping){ // Calculates how high jump should be vy = -speed*2; if(jumpY - y >= maxJumpHeight) falling =true; } } private void checkCollision(ArrayList<GameObject> object) { for(int i=0; i< object.size(); i++ ){ GameObject tempObject = object.get(i); if(tempObject.getId() == ObjectId.Ledge){ if(getBoundsTop().intersects(tempObject.getBoundsAll())){ //Top y = tempObject.getY() + tempObject.getBoundsAll().height; falling =true; } if(getBoundsRight().intersects(tempObject.getBoundsAll())){ // Right x = tempObject.getX() -width ; } if(getBoundsLeft().intersects(tempObject.getBoundsAll())){ //Left x = tempObject.getX() + tempObject.getWidth(); } if(getBoundsBottom().intersects(tempObject.getBoundsAll())){ //Bottom y = tempObject.getY() - height; falling =false; vy=0; }else{ falling =true; } } } } @Override public void render(Graphics g) { g.setColor(Color.BLACK); g.fillRect((int)x, (int)y, width, height); } @Override public Rectangle getBoundsAll() { return new Rectangle((int)x, (int)y,width,height); } public Rectangle getBoundsTop() { return new Rectangle((int) x , (int)y ,width,height/15); } public Rectangle getBoundsBottom() { return new Rectangle( (int)x , (int) y +height -(height /15),width,height/15); } public Rectangle getBoundsLeft() { return new Rectangle( (int) x , (int) y + height /10 ,width/8,height - (height /5)); } public Rectangle getBoundsRight() { return new Rectangle((int) x + width - (width/8) ,(int) y + height /10 ,width/8,height - height/5); } } My problem is when I add: else{ falling =true; } during the loop of the ArrayList to check collision, it stops the player from jumping and keeps him on the ground. I've tried to find a way around this but haven't had any luck. Any suggestions?

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• Translating multiple objects in GUI based on average position?

  - by user1423893

  I use this method to move a single object in 3D space, it accounts for a local offset based on where the cursor ray hits the widget and the center of the widget. var cursorRay = cursor.Ray; Vector3 goalPosition = translationWidget.GoalPosition; Vector3 position = cursorRay.Origin + cursorRay.Direction * grabDistance; // Constrain object movement based on selected axis switch (translationWidget.AxisSelected) { case AxisSelected.All: goalPosition = position; break; case AxisSelected.None: break; case AxisSelected.X: goalPosition.X = position.X; break; case AxisSelected.Y: goalPosition.Y = position.Y; break; case AxisSelected.Z: goalPosition.Z = position.Z; break; } translationWidget.GoalPosition = goalPosition; Vector3 p = goalPosition - translationWidget.LocalOffset; objectSelected.Position = p; I would like to move multiple objects based on the same principle and using a widget which is located at the average position of all the objects currently selected. I thought that I would have to translate each object based on their offset from the average point and then include the local offset. var cursorRay = cursor.Ray; Vector3 goalPosition = translationWidget.GoalPosition; Vector3 position = cursorRay.Origin + cursorRay.Direction * grabDistance; // Constrain object movement based on selected axis switch (translationWidget.AxisSelected) { case AxisSelected.All: goalPosition = position; break; case AxisSelected.None: break; case AxisSelected.X: goalPosition.X = position.X; break; case AxisSelected.Y: goalPosition.Y = position.Y; break; case AxisSelected.Z: goalPosition.Z = position.Z; break; } translationWidget.GoalPosition = goalPosition; Vector3 p = goalPosition - translationWidget.LocalOffset; int numSelectedObjects = objectSelectedList.Count; for (int i = 0; i < numSelectedObjects; ++i) { objectSelectedList[i].Position = (objectSelectedList[i].Position - translationWidget.Position) + p; } This doesn't work as the object starts shaking, which I think is because I haven't accounted for the new offset correctly. Where have I gone wrong?

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• Architecture or Pattern for handling properties with custom setter/getter?

  - by Shelby115

  Current Situation: I'm doing a simple MVC site for keeping journals as a personal project. My concern is I'm trying to keep the interaction between the pages and the classes simplistic. Where I run into issues is the password field. My setter encrypts the password, so the getter retrieves the encrypted password. public class JournalBook { private IEncryptor _encryptor { get; set; } private String _password { get; set; } public Int32 id { get; set; } public String name { get; set; } public String description { get; set; } public String password { get { return this._password; } set { this.setPassword(this._password, value, value); } } public List<Journal> journals { get; set; } public DateTime created { get; set; } public DateTime lastModified { get; set; } public Boolean passwordProtected { get { return this.password != null && this.password != String.Empty; } } ... } I'm currently using model-binding to submit changes or create new JournalBooks (like below). The problem arises that in the code below book.password is always null, I'm pretty sure this is because of the custom setter. [HttpPost] public ActionResult Create(JournalBook book) { // Create the JournalBook if not null. if (book != null) this.JournalBooks.Add(book); return RedirectToAction("Index"); } Question(s): Should I be handling this not in the property's getter/setter? Is there a pattern or architecture that allows for model-binding or another simple method when properties need to have custom getters/setters to manipulate the data? To summarize, how can I handle the password storing with encryption such that I have the following, Robust architecture I don't store the password as plaintext. Submitting a new or modified JournalBook is as easy as default model-binding (or close to it).

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• Struts 1 ActionForm - retrieving a collection from pure HTML

  - by Yaneeve

  Hi all I have (just like the rest) inherited some struts 1 code. I have had need to add a few more pages to this project. What I cannot figure out is how to map several distinct but similarly natured input elements to the my ActionForm. Let me elaborate. I create a new <Input> element dynamically as the user inputs more and more items (I use the YUI autocomplete form element and for each entered input I add it as an input element to my form and draw a new YUI autocomplete - complex sounding, I know) So... My form looks a bit like (... after some prettifying and some such...): <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <title>My Cool App - Test Case Builder</title> <link rel="stylesheet" type="text/css" href="../script/yui/fonts/fonts-min.css" /> <link rel="stylesheet" type="text/css" href="../skins/myCoolApp/button/button.css" /> <link rel="stylesheet" type="text/css" href="../script/yui/autocomplete/assets/skins/sam/autocomplete.css" /> <link rel="stylesheet" type="text/css" media="screen" href="../skins/myCoolApp/testcase.css" /> <!-- YUI JAVA SCRIPTS --> <script type="text/javascript" src="../script/yui/yahoo-dom-event/yahoo-dom-event.js"></script> <script type="text/javascript" src="../script/yui/element/element-min.js"></script> <script type="text/javascript" src="../script/yui/button/button-min.js"></script> <script type="text/javascript" src="../script/yui/datasource/datasource-min.js"></script> <script type="text/javascript" src="../script/yui/autocomplete/autocomplete-min.js"></script> <!-- APP JAVA SCRIPTS --> <script type="text/javascript" src="../script/myCoolApp/myCoolApp.js" ></script> <script type="text/javascript" src="../script/myCoolApp/stack.js" ></script> <script type="text/javascript" src="../script/myCoolApp/testcase/testcase.js"></script> <script type="text/javascript" src="../script/myCoolApp/testcase/default-data.js" ></script> <script type="text/javascript" src="../script/myCoolApp/testcase/data-structs.js" ></script> <script type="text/javascript" src="../script/myCoolApp/testcase/ui-elements.js" ></script> </head> <body class="cf010"> <div id="wrap"> <div id="header"> <div id="main-header"> COOL APP </div> </div> <div id="main-body"> <div id="content"> <div class="col main"> <div id="main"> <form method="post" id="testcaseForm" class="typea" action=""> <fieldset> <legend>Test Case Builder</legend> <div id="tk1" class="tabcontrol"> <ul class="tabs"> <li class="first active"> <a href="#"> <span>General</span> </a> </li> <li class="last"> <a href="#"> <span>Parameters</span> </a> </li> </ul> <div id="tab0" class="tc-panel"> <dl class="cls9"> <dt> <label for="scenario">Choose Scenario:</label> </dt> <dd> <input type="text" id="scenario" name="scenario" class="text" /> <span id="scenarioToggle"></span> <div class="auto-complete" id="scenarioContainer"></div> </dd> <dt> <label for="ruleID">Choose Rule ID:</label> </dt> <dd> <input type="text" id="ruleID" name="ruleID" class="text" /> <span id="ruleIDToggle"></span> <div class="auto-complete" id="ruleIDContainer"></div> </dd> <dt> <label for="Test Case Name" accesskey="t"><span class="accesskey">T</span>est Case Name:</label> </dt> <dd> <input type="text" id="testCaseName" name="testCaseName" class="text" /> </dd> </dl> </div> <div id="tab1" class="tc-panel hidden"> <div class="toolbar" id="action-bar"> <ul> <li class="first"> <a title="select all" href="#" id="btmSelectAll" class="button"> <span>select all</span> </a> </li> <li> <a title="remove row" href="#" id="btmRemove" class="button"> <span>remove row</span> </a> </li> <li> <a title="undo last" href="#" id="btmRollBack" class="button disabled"> <span>undo last</span> </a> </li> <li class="last"> <a title="accept row" href="#" id="btmAccept" class="button disabled"> <span>accept row</span> </a> </li> </ul> </div> <div id="param.list" class="gridclip"> <table id='param.list.tbl' class='grid modela' > <caption>Test Case Summary</caption> <col/><col/><col/> <thead> <tr> <th class='hl center first'> <input class='grid-select-all' type='checkbox' /> <th> <th scope='col'>Row</th> <th scope='col'>Parameter</th> <th scope='col' class='last'>Value</th> </tr> </thead> <tfoot> <tr> <th scope='row'>Total</th> <td colspan='3'>2 parameters as Test Case input</td> </tr> </tfoot> <tbody id='param.list.tbl.body'> <tr class='odd'> <td class='rowcheck center first'> <input value='param1###value1' id='cb1' name='SelectedRows' class='grid-select-row' type='checkbox'/> </td> <td class='id'>1</td> <td>param1</td> <td class='last'>value1</td> </tr> <tr class='even'> <td class='rowcheck center first'> <input value='param2###value2' id='cb1' name='SelectedRows' class='grid-select-row' type='checkbox'/> </td> <td class='id'>2</td> <td>param2</td> <td class='last'>value2</td> </tr> <tr class='odd'> <td class='rowcheck center first' /> <td class='id'><em>new</em></td> <td> <dl class='clsTable'> <dt> <input type='text' id='param' name='param' class='text paramInput' /> </dt> <dd> <span id='paramToggle' /> </dd> <div class='auto-complete' id='paramContainer' /> </dl> </td> <td class='last'> <dl class='clsTable'> <dt> <input type='text' id='value' name='value' class='text valueInput' /> </dt> </dl> </td> </tr> </tbody> </table> </div> </div> </div> <!-- tabcontrol --> </fieldset> <div class="submit-box"> <input type="submit" name="formRun" id="formRun" class="form-save" value="Execute" accesskey="x" title="Run: Press Alt + [Shift] + x" /> <input type="submit" name="formSave" id="formSave" value="Save" accesskey="s" title="Save: Press Alt + [Shift] + s" /> <input type="submit" name="formLoad" id="formLoad" value="Load" accesskey="l" title="Load: Press Alt + [Shift] + l" /> <input type="submit" name="formCancel" id="formCancel" class="form-cancel" value="Cancel" accesskey="c" title="Cancel: Press Alt + [Shift] + c" /> </div> </form> </div> </div> </div> </div> </div> </body> </html> As you can see the following is pretty much a duplicate: <tr class='odd'> <td class='rowcheck center first'> <input value='param1###value1' id='cb1' name='SelectedRows' class='grid-select-row' type='checkbox'/> </td> <td class='id'>1</td> <td>param1</td> <td class='last'>value1</td> </tr> <tr class='even'> <td class='rowcheck center first'> <input value='param2###value2' id='cb1' name='SelectedRows' class='grid-select-row' type='checkbox'/> </td> <td class='id'>2</td> <td>param2</td> <td class='last'>value2</td> </tr> The relevant part of my stuts-config.xml file is: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"> <struts-config> <data-sources /> <form-beans> <form-bean name="TestCaseForm" type="com.blahblah.mycoolapp.forms.TestCaseForm" /> </form-beans> <action-mappings> <action path="/pages/SaveTestCase" name="TestCaseForm" type="org.springframework.web.struts.DelegatingActionProxy" scope="request"> </action> </action-mappings> <message-resources parameter="MessageResources" /> </struts-config> I also use spring 2.56 (The relevant part being): <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <bean name="/pages/SaveTestCase" class="com.blahblah.mycoolapp.actions.TestCaseBuilderSaveAction" /> </beans> My Java ActionForm class (from what I had learned off the net) is: package com.blahblah.mycoolapp.forms; import java.util.ArrayList; import java.util.List; import org.apache.struts.action.ActionForm; public class TestCaseForm extends ActionForm { private static final long serialVersionUID = 2352146257739099766L; private String scenario; private String ruleID; private String testCaseName; private List<String> SelectedRows = new ArrayList<String>() ; public String getScenario() { return scenario; } public void setScenario(String scenario) { this.scenario = scenario; } public String getRuleID() { return ruleID; } public void setRuleID(String ruleID) { this.ruleID = ruleID; } public String getTestCaseName() { return testCaseName; } public void setTestCaseName(String testCaseName) { this.testCaseName = testCaseName; } public List<String> getSelectedRows() { return SelectedRows; } public void setSelectedRows(int index, String value) { this.SelectedRows.add(value); } } The question is why do I get an empty SelectedRows in my TestCaseBuilderSave Action? Thanks all who have the patience to read such a long question... and (hopefully) thanks to all you potential saviors :)

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• How to compile a C++ source code written for Linux/Unix on Windows Vista (code given)

  - by HTMZ

  I have a c++ source code that was written in linux/unix environment by some other author. It gives me errors when i compile it in windows vista environment. I am using Bloodshed Dev C++ v 4.9. please help. #include <iostream.h> #include <map> #include <vector> #include <string> #include <string.h> #include <strstream> #include <unistd.h> #include <stdlib.h> using namespace std; template <class T> class PrefixSpan { private: vector < vector <T> > transaction; vector < pair <T, unsigned int> > pattern; unsigned int minsup; unsigned int minpat; unsigned int maxpat; bool all; bool where; string delimiter; bool verbose; ostream *os; void report (vector <pair <unsigned int, int> > &projected) { if (minpat > pattern.size()) return; // print where & pattern if (where) { *os << "<pattern>" << endl; // what: if (all) { *os << "<freq>" << pattern[pattern.size()-1].second << "</freq>" << endl; *os << "<what>"; for (unsigned int i = 0; i < pattern.size(); i++) *os << (i ? " " : "") << pattern[i].first; } else { *os << "<what>"; for (unsigned int i = 0; i < pattern.size(); i++) *os << (i ? " " : "") << pattern[i].first << delimiter << pattern[i].second; } *os << "</what>" << endl; // where *os << "<where>"; for (unsigned int i = 0; i < projected.size(); i++) *os << (i ? " " : "") << projected[i].first; *os << "</where>" << endl; *os << "</pattern>" << endl; } else { // print found pattern only if (all) { *os << pattern[pattern.size()-1].second; for (unsigned int i = 0; i < pattern.size(); i++) *os << " " << pattern[i].first; } else { for (unsigned int i = 0; i < pattern.size(); i++) *os << (i ? " " : "") << pattern[i].first << delimiter << pattern[i].second; } *os << endl; } } void project (vector <pair <unsigned int, int> > &projected) { if (all) report(projected); map <T, vector <pair <unsigned int, int> > > counter; for (unsigned int i = 0; i < projected.size(); i++) { int pos = projected[i].second; unsigned int id = projected[i].first; unsigned int size = transaction[id].size(); map <T, int> tmp; for (unsigned int j = pos + 1; j < size; j++) { T item = transaction[id][j]; if (tmp.find (item) == tmp.end()) tmp[item] = j ; } for (map <T, int>::iterator k = tmp.begin(); k != tmp.end(); ++k) counter[k->first].push_back (make_pair <unsigned int, int> (id, k->second)); } for (map <T, vector <pair <unsigned int, int> > >::iterator l = counter.begin (); l != counter.end (); ) { if (l->second.size() < minsup) { map <T, vector <pair <unsigned int, int> > >::iterator tmp = l; tmp = l; ++tmp; counter.erase (l); l = tmp; } else { ++l; } } if (! all && counter.size () == 0) { report (projected); return; } for (map <T, vector <pair <unsigned int, int> > >::iterator l = counter.begin (); l != counter.end(); ++l) { if (pattern.size () < maxpat) { pattern.push_back (make_pair <T, unsigned int> (l->first, l->second.size())); project (l->second); pattern.erase (pattern.end()); } } } public: PrefixSpan (unsigned int _minsup = 1, unsigned int _minpat = 1, unsigned int _maxpat = 0xffffffff, bool _all = false, bool _where = false, string _delimiter = "/", bool _verbose = false): minsup(_minsup), minpat (_minpat), maxpat (_maxpat), all(_all), where(_where), delimiter (_delimiter), verbose (_verbose) {}; ~PrefixSpan () {}; istream& read (istream &is) { string line; vector <T> tmp; T item; while (getline (is, line)) { tmp.clear (); istrstream istrs ((char *)line.c_str()); while (istrs >> item) tmp.push_back (item); transaction.push_back (tmp); } return is; } ostream& run (ostream &_os) { os = &_os; if (verbose) *os << transaction.size() << endl; vector <pair <unsigned int, int> > root; for (unsigned int i = 0; i < transaction.size(); i++) root.push_back (make_pair (i, -1)); project (root); return *os; } void clear () { transaction.clear (); pattern.clear (); } }; int main (int argc, char **argv) { extern char *optarg; unsigned int minsup = 1; unsigned int minpat = 1; unsigned int maxpat = 0xffffffff; bool all = false; bool where = false; string delimiter = "/"; bool verbose = false; string type = "string"; int opt; while ((opt = getopt(argc, argv, "awvt:M:m:L:d:")) != -1) { switch(opt) { case 'a': all = true; break; case 'w': where = true; break; case 'v': verbose = true; break; case 'm': minsup = atoi (optarg); break; case 'M': minpat = atoi (optarg); break; case 'L': maxpat = atoi (optarg); break; case 't': type = string (optarg); break; case 'd': delimiter = string (optarg); break; default: cout << "Usage: " << argv[0] << " [-m minsup] [-M minpat] [-L maxpat] [-a] [-w] [-v] [-t type] [-d delimiter] < data .." << endl; return -1; } } if (type == "int") { PrefixSpan<unsigned int> prefixspan (minsup, minpat, maxpat, all, where, delimiter, verbose); prefixspan.read (cin); prefixspan.run (cout); }else if (type == "short") { PrefixSpan<unsigned short> prefixspan (minsup, minpat, maxpat, all, where, delimiter, verbose); prefixspan.read (cin); prefixspan.run (cout); } else if (type == "char") { PrefixSpan<unsigned char> prefixspan (minsup, minpat, maxpat, all, where, delimiter, verbose); prefixspan.read (cin); prefixspan.run (cout); } else if (type == "string") { PrefixSpan<string> prefixspan (minsup, minpat, maxpat, all, where, delimiter, verbose); prefixspan.read (cin); prefixspan.run (cout); } else { cerr << "Unknown Item Type: " << type << " : choose from [string|int|short|char]" << endl; return -1; } return 0; }

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• Nullpointerexcption & abrupt IOStream closure with inheritence and subclasses

  - by user1401652

  A brief background before so we can communicate on the same wave length. I've had about 8-10 university courses on programming from data structure, to one on all languages, to specific ones such as java & c++. I'm a bit rusty because i usually take 2-3 month breaks from coding. This is a personal project that I started thinking of two years back. Okay down to the details, and a specific question, I'm having problems with my mutator functions. It seems to be that I am trying to access a private variable incorrectly. The question is, am I nesting my classes too much and trying to mutate a base class variable the incorrect way. If so point me in the way of the correct literature, or confirm this is my problem so I can restudy this information. Thanks package GroceryReceiptProgram; import java.io.*; import java.util.Vector; public class Date { private int hour, minute, day, month, year; Date() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What's the hour? (Use 1-24 military notation"); hour = Integer.parseInt(keyboard.readLine()); System.out.println("what's the minute? "); minute = Integer.parseInt(keyboard.readLine()); System.out.println("What's the day of the month?"); day = Integer.parseInt(keyboard.readLine()); System.out.println("Which month of the year is it, use an integer"); month = Integer.parseInt(keyboard.readLine()); System.out.println("What year is it?"); year = Integer.parseInt(keyboard.readLine()); keyboard.close(); } catch (IOException e) { System.out.println("Yo houston we have a problem"); } } public void setHour(int hour) { this.hour = hour; } public void setHour() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What hour, use military notation?"); this.hour = Integer.parseInt(keyboard.readLine()); keyboard.close(); } catch (NumberFormatException e) { System.out.println(e.toString() + ":doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString()); } } public int getHour() { return hour; } public void setMinute(int minute) { this.minute = minute; } public void setMinute() { try (BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in))) { System.out.println("What minute?"); this.minute = Integer.parseInt(keyboard.readLine()); } catch (NumberFormatException e) { System.out.println(e.toString() + ": doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString() + ": minute shall not cooperate"); } catch (NullPointerException e) { System.out.println(e.toString() + ": in the setMinute function of the Date class"); } } public int getMinute() { return minute; } public void setDay(int day) { this.day = day; } public void setDay() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What day 0-6?"); this.day = Integer.parseInt(keyboard.readLine()); keyboard.close(); } catch (NumberFormatException e) { System.out.println(e.toString() + ":doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString()); } } public int getDay() { return day; } public void setMonth(int month) { this.month = month; } public void setMonth() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What month 0-11?"); this.month = Integer.parseInt(keyboard.readLine()); keyboard.close(); } catch (NumberFormatException e) { System.out.println(e.toString() + ":doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString()); } } public int getMonth() { return month; } public void setYear(int year) { this.year = year; } public void setYear() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What year?"); this.year = Integer.parseInt(keyboard.readLine()); keyboard.close(); } catch (NumberFormatException e) { System.out.println(e.toString() + ":doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString()); } } public int getYear() { return year; } public void set() { setMinute(); setHour(); setDay(); setMonth(); setYear(); } public Vector<Integer> get() { Vector<Integer> holder = new Vector<Integer>(5); holder.add(hour); holder.add(minute); holder.add(month); holder.add(day); holder.add(year); return holder; } }; That is the Date class obviously, next is the other base class Location. package GroceryReceiptProgram; import java.io.*; import java.util.Vector; public class Location { String streetName, state, city, country; int zipCode, address; Location() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What is the street name"); streetName = keyboard.readLine(); System.out.println("Which state?"); state = keyboard.readLine(); System.out.println("Which city?"); city = keyboard.readLine(); System.out.println("Which country?"); country = keyboard.readLine(); System.out.println("Which zipcode?");//if not u.s. continue around this step zipCode = Integer.parseInt(keyboard.readLine()); System.out.println("What address?"); address = Integer.parseInt(keyboard.readLine()); } catch (IOException e) { System.out.println(e.toString()); } } public void setZipCode(int zipCode) { this.zipCode = zipCode; } public void setZipCode() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What zipCode?"); this.zipCode = Integer.parseInt(keyboard.readLine()); keyboard.close(); } catch (NumberFormatException e) { System.out.println(e.toString() + ":doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString()); } } public void set() { setAddress(); setCity(); setCountry(); setState(); setStreetName(); setZipCode(); } public int getZipCode() { return zipCode; } public void setAddress(int address) { this.address = address; } public void setAddress() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What minute?"); this.address = Integer.parseInt(keyboard.readLine()); keyboard.close(); } catch (NumberFormatException e) { System.out.println(e.toString() + ":doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString()); } } public int getAddress() { return address; } public void setStreetName(String streetName) { this.streetName = streetName; } public void setStreetName() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What minute?"); this.streetName = keyboard.readLine(); keyboard.close(); } catch (IOException e) { System.out.println(e.toString()); } } public String getStreetName() { return streetName; } public void setState(String state) { this.state = state; } public void setState() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What minute?"); this.state = keyboard.readLine(); keyboard.close(); } catch (IOException e) { System.out.println(e.toString()); } } public String getState() { return state; } public void setCity(String city) { this.city = city; } public void setCity() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What minute?"); this.city = keyboard.readLine(); keyboard.close(); } catch (IOException e) { System.out.println(e.toString()); } } public String getCity() { return city; } public void setCountry(String country) { this.country = country; } public void setCountry() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What minute?"); this.country = keyboard.readLine(); keyboard.close(); } catch (IOException e) { System.out.println(e.toString()); } } public String getCountry() { return country; } }; their parent(What is the proper name?) class package GroceryReceiptProgram; import java.io.*; public class FoodGroup { private int price, count; private Date purchaseDate, expirationDate; private Location location; private String name; public FoodGroup() { try { setPrice(); setCount(); expirationDate.set(); purchaseDate.set(); location.set(); } catch (NullPointerException e) { System.out.println(e.toString() + ": in the constructor of the FoodGroup class"); } } public void setPrice(int price) { this.price = price; } public void setPrice() { try (BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in))) { System.out.println("What Price?"); price = Integer.parseInt(keyboard.readLine()); } catch (NumberFormatException e) { System.out.println(e.toString() + ":doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString() + ": in the FoodGroup class, setPrice function"); } catch (NullPointerException e) { System.out.println(e.toString() + ": in FoodGroup class. SetPrice()"); } } public int getPrice() { return price; } public void setCount(int count) { this.count = count; } public void setCount() { try (BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in))) { System.out.println("What count?"); count = Integer.parseInt(keyboard.readLine()); } catch (NumberFormatException e) { System.out.println(e.toString() + ":doesnt seem to be a number"); } catch (IOException e) { System.out.println(e.toString() + ": in the FoodGroup class, setCount()"); } catch (NullPointerException e) { System.out.println(e.toString() + ": in FoodGroup class, setCount"); } } public int getCount() { return count; } public void setName(String name) { this.name = name; } public void setName() { try { BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in)); System.out.println("What minute?"); this.name = keyboard.readLine(); } catch (IOException e) { System.out.println(e.toString()); } } public String getName() { return name; } public void setLocation(Location location) { this.location = location; } public Location getLocation() { return location; } public void setPurchaseDate(Date purchaseDate) { this.purchaseDate = purchaseDate; } public void setPurchaseDate() { this.purchaseDate.set(); } public Date getPurchaseDate() { return purchaseDate; } public void setExpirationDate(Date expirationDate) { this.expirationDate = expirationDate; } public void setExpirationDate() { this.expirationDate.set(); } public Date getExpirationDate() { return expirationDate; } } and finally the main class, so I can get access to all of this work. package GroceryReceiptProgram; public class NewMain { public static void main(String[] args) { FoodGroup test = new FoodGroup(); } } If anyone is further interested, here is a link the UML for this. https://www.dropbox.com/s/1weigjnxih70tbv/GRP.dia

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• CodePlex Daily Summary for Wednesday, February 17, 2010

  CodePlex Daily Summary for Wednesday, February 17, 2010New ProjectsAcademic Success Accounting System: The system is intended to use by school teacher to set marks to students and estimate their academic success and possibilities. The client applicat...Access.PowerTools: Access PowerTools is currently a sample MS Access add-in project to try & test features of Add-in Express™ 2009 for Microsoft® Office and .net (ht...AntoonCms: AntoonCms makes it easy to maintain a simple website with it's builtin administration pages. It's developed in C# on target Framework 2.0 The CMS...ASP.NET MVC Mehr Lib: Mehr Lib makes it easier for ASP.NET MVC developers to do develop projects. It's developed in C#. This version currently include Ajax master detail...BCryptTool: Developer tool that calculates BCrypt hash codes for strings. BCrypt is an implementation of the Blowfish cipher and a computationally-expensive ha...Coronasoft Cryostasis scripting engine: A scripting engine that allows you to dynamically load plugins from just about any supported .NET language. Its written in C#. Languages supported ...Critical Point Search: Critical Point Searchcritical points: critical pointsFont Family Name Retrieval: This library helps developer to retrieve the font family name from the TTF, OTF and TTC font files, so that developer can display the font without ...jQuery Form Input Hints Plugin: Automatically display hints on input textboxes in your forms using this jQuery plugin. I wrote this code to be as simple and as easy to use as pos...Kojax: kojax projectKronRetro: KronRetro! Making a Habbo Retro just got easier! Powered by PHP & MySQL you can make a Habbo Retro site fast!MVVM Wrapper Kit: MVVM Wrapper Kit makes it easier for View Model programmers to wrap their business objects and collections while preserving change notification and...ObjectCartographer: ObjectCartographer is an object to object mapper and object factory. It's developed in C#.PE-file Reader Writer API (PERWAPI): PERWAPI is a reader writer module for .NET program executables. It has been used as back-end for progamming language compilers such as Gardens Poi...Pinger: A simple Pinger, pings an address until you press a buttonQPV: 0.1: QPV aka Que pelicula es una aplicacion que consiste crear una base de datos potente de peliculas, criticas e informacion para poder filtrar pelicul...SIMD Detector: This SIMD class helps developers to detect the types of SIMD instruction available on users' processor. It supports Intel and AMD CPUs. It is writt...StackOverflow Test Project: Following Andrew Siemer's StackOverflow Knowledge Exchange Project.WeBlog: A blogging platform built on the MVC framework The project will showcase current technologies such as MVC 2, Silverlight 4 and jQuery 1.4. Data pro...Webmedia: this is my webmedia projectWindows Azure RSS Reader: This is and online RSS reader based on the Windows Azure platformWordEditor. A Word Editor for Windows, and an extended RichTextBox control.: This is a word editor that can be used as a stand alone word processor, or added to an existing project.Домашняя Бухгалтерия: Программа для ведения домашнего бухгалтерского учета финансов. New ReleasesAccess.PowerTools: Access PowerTools Add-In Community Edition v.0.0.1: Access PowerTools Add-In Community Edition v.0.0.1 is a sample MS Access add-in project to try & test Add-in Express™ 2009 for Microsoft® Office an...Active CSS: ActiveCSS-0.1.1: revision for version 0.1ASP.NET: Microsoft Ajax Minifier 4.0: The Microsoft Ajax Minifier enables you to improve the performance of your Ajax applications by reducing the size of your Cascading Style Sheet and...ASP.NET MVC Mehr Lib: V1.0: Mehr Lib V1.0 This version currently include ajax master detail combo facilities.ASP.net Ribbon: Version 1.2: New controls : Expandable gallery Color Picker Multi color File Menu Some JS modifications. Some CSS modifications. Includes some functionna...ASP.NET Web Forms Model-View-Presenter (MVP) Contrib: WebForms MVP Contrib CTP6: This is a release of the WebForms MVP Contrib project for WebForms MVP CTP6. 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• SQL SERVER – Securing TRUNCATE Permissions in SQL Server

  - by pinaldave

  Download the Script of this article from here. On December 11, 2010, Vinod Kumar, a Databases & BI technology evangelist from Microsoft Corporation, graced Ahmedabad by spending some time with the Community during the Community Tech Days (CTD) event. As he was running through a few demos, Vinod asked the audience one of the most fundamental and common interview questions – “What is the difference between a DELETE and TRUNCATE?“ Ahmedabad SQL Server User Group Expert Nakul Vachhrajani has come up with excellent solutions of the same. I must congratulate Nakul for this excellent solution and as a encouragement to User Group member, I am publishing the same article over here. Nakul Vachhrajani is a Software Specialist and systems development professional with Patni Computer Systems Limited. He has functional experience spanning legacy code deprecation, system design, documentation, development, implementation, testing, maintenance and support of complex systems, providing business intelligence solutions, database administration, performance tuning, optimization, product management, release engineering, process definition and implementation. He has comprehensive grasp on Database Administration, Development and Implementation with MS SQL Server and C, C++, Visual C++/C#. He has about 6 years of total experience in information technology. Nakul is an member of the Ahmedabad and Gandhinagar SQL Server User Groups, and actively contributes to the community by actively participating in multiple forums and websites like SQLAuthority.com, BeyondRelational.com, SQLServerCentral.com and many others. Please note: The opinions expressed herein are Nakul own personal opinions and do not represent his employer’s view in anyway. All data from everywhere here on Earth go through a series of  four distinct operations, identified by the words: CREATE, READ, UPDATE and DELETE, or simply, CRUD. Putting in Microsoft SQL Server terms, is the process goes like this: INSERT, SELECT, UPDATE and DELETE/TRUNCATE. Quite a few interesting responses were received and evaluated live during the session. To summarize them, the most important similarity that came out was that both DELETE and TRUNCATE participate in transactions. The major differences (not all) that came out of the exercise were: DELETE: DELETE supports a WHERE clause DELETE removes rows from a table, row-by-row Because DELETE moves row-by-row, it acquires a row-level lock Depending upon the recovery model of the database, DELETE is a fully-logged operation. Because DELETE moves row-by-row, it can fire off triggers TRUNCATE: TRUNCATE does not support a WHERE clause TRUNCATE works by directly removing the individual data pages of a table TRUNCATE directly occupies a table-level lock. (Because a lock is acquired, and because TRUNCATE can also participate in a transaction, it has to be a logged operation) TRUNCATE is, therefore, a minimally-logged operation; again, this depends upon the recovery model of the database Triggers are not fired when TRUNCATE is used (because individual row deletions are not logged) Finally, Vinod popped the big homework question that must be critically analyzed: “We know that we can restrict a DELETE operation to a particular user, but how can we restrict the TRUNCATE operation to a particular user?” After returning home and having a nice cup of coffee, I noticed that my gray cells immediately started to work. Below was the result of my research. As what is always said, the devil is in the details. Upon looking at the Permissions section for the TRUNCATE statement in Books On Line, the following jumps right out: “The minimum permission required is ALTER on table_name. TRUNCATE TABLE permissions default to the table owner, members of the sysadmin fixed server role, and the db_owner and db_ddladmin fixed database roles, and are not transferable. However, you can incorporate the TRUNCATE TABLE statement within a module, such as a stored procedure, and grant appropriate permissions to the module using the EXECUTE AS clause.“ Now, what does this mean? Unlike DELETE, one cannot directly assign permissions to a user/set of users allowing or revoking TRUNCATE rights. However, there is a way to circumvent this. It is important to recall that in Microsoft SQL Server, database engine security surrounds the concept of a “securable”, which is any object like a table, stored procedure, trigger, etc. Rights are assigned to a principal on a securable. Refer to the image below (taken from the SQL Server Books On Line). urable”, which is any object like a table, stored procedure, trigger, etc. Rights are assigned to a principal on a securable. Refer to the image below (taken from the SQL Server Books On Line). SETTING UP THE ENVIRONMENT – (01A_Truncate Table Permissions.sql) Script Provided at the end of the article. By the end of this demo, one will be able to do all the CRUD operations, except the TRUNCATE, and the other will only be able to execute the TRUNCATE. All you will need for this test is any edition of SQL Server 2008. (With minor changes, these scripts can be made to work with SQL 2005.) We begin by creating the following: 1.       A test database 2.        Two database roles: associated logins and users 3.       Switch over to the test database and create a test table. Then, add some data into it. I am using row constructors, which is new to SQL 2008. Creating the modules that will be used to enforce permissions 1.       We have already created one of the modules that we will be assigning permissions to. That module is the table: TruncatePermissionsTest 2.       We will now create two stored procedures; one is for the DELETE operation and the other for the TRUNCATE operation. Please note that for all practical purposes, the end result is the same – all data from the table TruncatePermissionsTest is removed Assigning the permissions Now comes the most important part of the demonstration – assigning permissions. A permissions matrix can be worked out as under: To apply the security rights, we use the GRANT and DENY clauses, as under: That’s it! We are now ready for our big test! THE TEST (01B_Truncate Table Test Queries.sql) Script Provided at the end of the article. I will now need two separate SSMS connections, one with the login AllowedTruncate and the other with the login RestrictedTruncate. Running the test is simple; all that’s required is to run through the script – 01B_Truncate Table Test Queries.sql. What I will demonstrate here via screen-shots is the behavior of SQL Server when logged in as the AllowedTruncate user. There are a few other combinations than what are highlighted here. I will leave the reader the right to explore the behavior of the RestrictedTruncate user and these additional scenarios, as a form of self-study. 1.       Testing SELECT permissions 2.       Testing TRUNCATE permissions (Remember, “deny by default”?) 3.       Trying to circumvent security by trying to TRUNCATE the table using the stored procedure Hence, we have now proved that a user can indeed be assigned permissions to specifically assign TRUNCATE permissions. I also hope that the above has sparked curiosity towards putting some security around the probably “destructive” operations of DELETE and TRUNCATE. I would like to wish each and every one of the readers a very happy and secure time with Microsoft SQL Server. (Please find the scripts – 01A_Truncate Table Permissions.sql and 01B_Truncate Table Test Queries.sql that have been used in this demonstration. Please note that these scripts contain purely test-level code only. These scripts must not, at any cost, be used in the reader’s production environments). 01A_Truncate Table Permissions.sql /* ***************************************************************************************************************** Developed By          : Nakul Vachhrajani Functionality         : This demo is focused on how to allow only TRUNCATE permissions to a particular user How to Use            : 1. Run through, step-by-step through the sequence till Step 08 to create a test database 2. Switch over to the "Truncate Table Test Queries.sql" and execute it step-by-step in two different SSMS windows, one where you have logged in as 'RestrictedTruncate', and the other as 'AllowedTruncate' 3. Come back to "Truncate Table Permissions.sql" 4. Execute Step 10 to cleanup! Modifications         : December 13, 2010 - NAV - Updated to add a security matrix and improve code readability when applying security December 12, 2010 - NAV - Created ***************************************************************************************************************** */ -- Step 01: Create a new test database CREATE DATABASE TruncateTestDB GO USE TruncateTestDB GO -- Step 02: Add roles and users to demonstrate the security of the Truncate operation -- 2a. Create the new roles CREATE ROLE AllowedTruncateRole; GO CREATE ROLE RestrictedTruncateRole; GO -- 2b. Create new logins CREATE LOGIN AllowedTruncate WITH PASSWORD = 'truncate@2010', CHECK_POLICY = ON GO CREATE LOGIN RestrictedTruncate WITH PASSWORD = 'truncate@2010', CHECK_POLICY = ON GO -- 2c. Create new Users using the roles and logins created aboave CREATE USER TruncateUser FOR LOGIN AllowedTruncate WITH DEFAULT_SCHEMA = dbo GO CREATE USER NoTruncateUser FOR LOGIN RestrictedTruncate WITH DEFAULT_SCHEMA = dbo GO -- 2d. Add the newly created login to the newly created role sp_addrolemember 'AllowedTruncateRole','TruncateUser' GO sp_addrolemember 'RestrictedTruncateRole','NoTruncateUser' GO -- Step 03: Change over to the test database USE TruncateTestDB GO -- Step 04: Create a test table within the test databse CREATE TABLE TruncatePermissionsTest (Id INT IDENTITY(1,1), Name NVARCHAR(50)) GO -- Step 05: Populate the required data INSERT INTO TruncatePermissionsTest VALUES (N'Delhi'), (N'Mumbai'), (N'Ahmedabad') GO -- Step 06: Encapsulate the DELETE within another module CREATE PROCEDURE proc_DeleteMyTable WITH EXECUTE AS SELF AS DELETE FROM TruncateTestDB..TruncatePermissionsTest GO -- Step 07: Encapsulate the TRUNCATE within another module CREATE PROCEDURE proc_TruncateMyTable WITH EXECUTE AS SELF AS TRUNCATE TABLE TruncateTestDB..TruncatePermissionsTest GO -- Step 08: Apply Security /* *****************************SECURITY MATRIX*************************************** =================================================================================== Object                   | Permissions |                 Login |             | AllowedTruncate   |   RestrictedTruncate |             |User:NoTruncateUser|   User:TruncateUser =================================================================================== TruncatePermissionsTest  | SELECT,     |      GRANT        |      (Default) | INSERT,     |                   | | UPDATE,     |                   | | DELETE      |                   | -------------------------+-------------+-------------------+----------------------- TruncatePermissionsTest  | ALTER       |      DENY         |      (Default) -------------------------+-------------+----*/----------------+----------------------- proc_DeleteMyTable | EXECUTE | GRANT | DENY -------------------------+-------------+-------------------+----------------------- proc_TruncateMyTable | EXECUTE | DENY | GRANT -------------------------+-------------+-------------------+----------------------- *****************************SECURITY MATRIX*************************************** */ /* Table: TruncatePermissionsTest*/ GRANT SELECT, INSERT, UPDATE, DELETE ON TruncateTestDB..TruncatePermissionsTest TO NoTruncateUser GO DENY ALTER ON TruncateTestDB..TruncatePermissionsTest TO NoTruncateUser GO /* Procedure: proc_DeleteMyTable*/ GRANT EXECUTE ON TruncateTestDB..proc_DeleteMyTable TO NoTruncateUser GO DENY EXECUTE ON TruncateTestDB..proc_DeleteMyTable TO TruncateUser GO /* Procedure: proc_TruncateMyTable*/ DENY EXECUTE ON TruncateTestDB..proc_TruncateMyTable TO NoTruncateUser GO GRANT EXECUTE ON TruncateTestDB..proc_TruncateMyTable TO TruncateUser GO -- Step 09: Test --Switch over to the "Truncate Table Test Queries.sql" and execute it step-by-step in two different SSMS windows: --    1. one where you have logged in as 'RestrictedTruncate', and --    2. the other as 'AllowedTruncate' -- Step 10: Cleanup sp_droprolemember 'AllowedTruncateRole','TruncateUser' GO sp_droprolemember 'RestrictedTruncateRole','NoTruncateUser' GO DROP USER TruncateUser GO DROP USER NoTruncateUser GO DROP LOGIN AllowedTruncate GO DROP LOGIN RestrictedTruncate GO DROP ROLE AllowedTruncateRole GO DROP ROLE RestrictedTruncateRole GO USE MASTER GO DROP DATABASE TruncateTestDB GO 01B_Truncate Table Test Queries.sql /* ***************************************************************************************************************** Developed By          : Nakul Vachhrajani Functionality         : This demo is focused on how to allow only TRUNCATE permissions to a particular user How to Use            : 1. Switch over to this from "Truncate Table Permissions.sql", Step #09 2. Execute this step-by-step in two different SSMS windows a. One where you have logged in as 'RestrictedTruncate', and b. The other as 'AllowedTruncate' 3. Return back to "Truncate Table Permissions.sql" 4. Execute Step 10 to cleanup! Modifications         : December 12, 2010 - NAV - Created ***************************************************************************************************************** */ -- Step 09A: Switch to the test database USE TruncateTestDB GO -- Step 09B: Ensure that we have valid data SELECT * FROM TruncatePermissionsTest GO -- (Expected: Following error will occur if logged in as "AllowedTruncate") -- Msg 229, Level 14, State 5, Line 1 -- The SELECT permission was denied on the object 'TruncatePermissionsTest', database 'TruncateTestDB', schema 'dbo'. --Step 09C: Attempt to Truncate Data from the table without using the stored procedure TRUNCATE TABLE TruncatePermissionsTest GO -- (Expected: Following error will occur) --  Msg 1088, Level 16, State 7, Line 2 --  Cannot find the object "TruncatePermissionsTest" because it does not exist or you do not have permissions. -- Step 09D:Regenerate Test Data INSERT INTO TruncatePermissionsTest VALUES (N'London'), (N'Paris'), (N'Berlin') GO -- (Expected: Following error will occur if logged in as "AllowedTruncate") -- Msg 229, Level 14, State 5, Line 1 -- The INSERT permission was denied on the object 'TruncatePermissionsTest', database 'TruncateTestDB', schema 'dbo'. --Step 09E: Attempt to Truncate Data from the table using the stored procedure EXEC proc_TruncateMyTable GO -- (Expected: Will execute successfully with 'AllowedTruncate' user, will error out as under with 'RestrictedTruncate') -- Msg 229, Level 14, State 5, Procedure proc_TruncateMyTable, Line 1 -- The EXECUTE permission was denied on the object 'proc_TruncateMyTable', database 'TruncateTestDB', schema 'dbo'. -- Step 09F:Regenerate Test Data INSERT INTO TruncatePermissionsTest VALUES (N'Madrid'), (N'Rome'), (N'Athens') GO --Step 09G: Attempt to Delete Data from the table without using the stored procedure DELETE FROM TruncatePermissionsTest GO -- (Expected: Following error will occur if logged in as "AllowedTruncate") -- Msg 229, Level 14, State 5, Line 2 -- The DELETE permission was denied on the object 'TruncatePermissionsTest', database 'TruncateTestDB', schema 'dbo'. -- Step 09H:Regenerate Test Data INSERT INTO TruncatePermissionsTest VALUES (N'Spain'), (N'Italy'), (N'Greece') GO --Step 09I: Attempt to Delete Data from the table using the stored procedure EXEC proc_DeleteMyTable GO -- (Expected: Following error will occur if logged in as "AllowedTruncate") -- Msg 229, Level 14, State 5, Procedure proc_DeleteMyTable, Line 1 -- The EXECUTE permission was denied on the object 'proc_DeleteMyTable', database 'TruncateTestDB', schema 'dbo'. --Step 09J: Close this SSMS window and return back to "Truncate Table Permissions.sql" Thank you Nakul to take up the challenge and prove that Ahmedabad and Gandhinagar SQL Server User Group has talent to solve difficult problems. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Best Practices, Pinal Dave, Readers Contribution, Readers Question, SQL, SQL Authority, SQL Query, SQL Scripts, SQL Security, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• Windows Phone 7 development: reading RSS feeds

  - by DigiMortal

  One limitation on Windows Phone 7 is related to System.Net namespace classes. There is no convenient way to read data from web. There is no WebClient class. There is no GetResponse() method – we have to do it all asynchronously because compact framework has limited set of classes we can use in our applications to communicate with internet. In this posting I will show you how to read RSS-feeds on Windows Phone 7. NB! This is my draft code and it may contain some design flaws and some questionable solutions. This code is intended to use as test-drive for Windows Phone 7 CTP developer tools and I don’t suppose you are going to use this code in production environment. Current state of my RSS-reader Currently my RSS-reader for Windows Phone 7 is very simple, primitive and uses almost all defaults that come out-of-box with Windows Phone 7 CTP developer tools. My first goal before going on with nicer user interface design was making RSS-reading work because instead of convenient classes from .NET Framework we have to use very limited classes from .NET Framework CE. This is why I took the reading of RSS-feeds as my first task. There are currently more things to solve regarding user-interface. As I am pretty new to all this Silverlight stuff I am not very sure if I can modify default controls easily or should I write my own controls that have better look and that work faster. The image on right shows you how my RSS-reader looks like right now. Upper side of screen is filled with list that shows headlines from this blog. The bottom part of screen is used to show description of selected posting. You can click on the image to see it in original size. In my next posting I will show you some improvements of my RSS-reader user interface that make it look nicer. But currently it is nice enough to make sure that RSS-feeds are read correctly. FeedItem class As this is most straight-forward part of the following code I will show you RSS-feed items class first. I think we have to stop on it because it is simple one. public class FeedItem {     public string Title { get; set; }     public string Description { get; set; }     public DateTime PublishDate { get; set; }     public List<string> Categories { get; set; }     public string Link { get; set; }       public FeedItem()     {         Categories = new List<string>();     } } RssClient RssClient takes feed URL and when asked it loads all items from feed and gives them back to caller through ItemsReceived event. Why it works this way? Because we can make responses only using asynchronous methods. I will show you in next section how to use this class. Although the code here is not very good but it works like expected. I will refactor this code later because it needs some more efforts and investigating. But let’s hope I find excellent solution. :) public class RssClient {     private readonly string _rssUrl;       public delegate void ItemsReceivedDelegate(RssClient client, IList<FeedItem> items);     public event ItemsReceivedDelegate ItemsReceived;       public RssClient(string rssUrl)     {         _rssUrl = rssUrl;     }       public void LoadItems()     {         var request = (HttpWebRequest)WebRequest.Create(_rssUrl);         var result = (IAsyncResult)request.BeginGetResponse(ResponseCallback, request);     }       void ResponseCallback(IAsyncResult result)     {         var request = (HttpWebRequest)result.AsyncState;         var response = request.EndGetResponse(result);           var stream = response.GetResponseStream();         var reader = XmlReader.Create(stream);         var items = new List<FeedItem>(50);           FeedItem item = null;         var pointerMoved = false;           while (!reader.EOF)         {             if (pointerMoved)             {                 pointerMoved = false;             }             else             {                 if (!reader.Read())                     break;             }               var nodeName = reader.Name;             var nodeType = reader.NodeType;               if (nodeName == "item")             {                 if (nodeType == XmlNodeType.Element)                     item = new FeedItem();                 else if (nodeType == XmlNodeType.EndElement)                     if (item != null)                     {                         items.Add(item);                         item = null;                     }                   continue;             }               if (nodeType != XmlNodeType.Element)                 continue;               if (item == null)                 continue;               reader.MoveToContent();             var nodeValue = reader.ReadElementContentAsString();             // we just moved internal pointer             pointerMoved = true;               if (nodeName == "title")                 item.Title = nodeValue;             else if (nodeName == "description")                 item.Description =  Regex.Replace(nodeValue,@"<(.|\n)*?>",string.Empty);             else if (nodeName == "feedburner:origLink")                 item.Link = nodeValue;             else if (nodeName == "pubDate")             {                 if (!string.IsNullOrEmpty(nodeValue))                     item.PublishDate = DateTime.Parse(nodeValue);             }             else if (nodeName == "category")                 item.Categories.Add(nodeValue);         }           if (ItemsReceived != null)             ItemsReceived(this, items);     } } This method is pretty long but it works. Now let’s try to use it in Windows Phone 7 application. Using RssClient And this is the fragment of code behing the main page of my application start screen. You can see how RssClient is initialized and how items are bound to list that shows them. public MainPage() {     InitializeComponent();       SupportedOrientations = SupportedPageOrientation.Portrait | SupportedPageOrientation.Landscape;     listBox1.Width = Width;       var rssClient = new RssClient("http://feedproxy.google.com/gunnarpeipman");     rssClient.ItemsReceived += new RssClient.ItemsReceivedDelegate(rssClient_ItemsReceived);     rssClient.LoadItems(); }   void rssClient_ItemsReceived(RssClient client, IList<FeedItem> items) {     Dispatcher.BeginInvoke(delegate()     {         listBox1.ItemsSource = items;     });            } Conclusion As you can see it was not very hard task to read RSS-feed and populate list with feed entries. Although we are not able to use more powerful classes that are part of full version on .NET Framework we can still live with limited set of classes that .NET Framework CE provides.

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• Load and Web Performance Testing using Visual Studio Ultimate 2010-Part 3

  - by Tarun Arora

  Welcome back once again, in Part 1 of Load and Web Performance Testing using Visual Studio 2010 I talked about why Performance Testing the application is important, the test tools available in Visual Studio Ultimate 2010 and various test rig topologies, in Part 2 of Load and Web Performance Testing using Visual Studio 2010 I discussed the details of web performance & load tests as well as why it’s important to follow a goal based pattern while performance testing your application. In part 3 I’ll be discussing Test Result Analysis, Test Result Drill through, Test Report Generation, Test Run Comparison, Asp.net Profiler and some closing thoughts. Test Results – I see some creepy worms! In Part 2 we put together a web performance test and a load test, lets run the test to see load test to see how the Web site responds to the load simulation. While the load test is running you will be able to see close to real time analysis in the Load Test Analyser window. You can use the Load Test Analyser to conduct load test analysis in three ways: Monitor a running load test - A condensed set of the performance counter data is maintained in memory. To prevent the results memory requirements from growing unbounded, up to 200 samples for each performance counter are maintained. This includes 100 evenly spaced samples that span the current elapsed time of the run and the most recent 100 samples.         After the load test run is completed - The test controller spools all collected performance counter data to a database while the test is running. Additional data, such as timing details and error details, is loaded into the database when the test completes. The performance data for a completed test is loaded from the database and analysed by the Load Test Analyser. Below you can see a screen shot of the summary view, this provides key results in a format that is compact and easy to read. You can also print the load test summary, this is generated after the test has completed or been stopped.         Analyse the load test results of a previously run load test – We’ll see this in the section where i discuss comparison between two test runs. The performance counters can be plotted on the graphs. You also have the option to highlight a selected part of the test and view details, drill down to the user activity chart where you can hover over to see more details of the test run.   Generate Report => Test Run Comparisons The level of reports you can generate using the Load Test Analyser is astonishing. You have the option to create excel reports and conduct side by side analysis of two test results or to track trend analysis. The tools also allows you to export the graph data either to MS Excel or to a CSV file. You can view the ASP.NET profiler report to conduct further analysis as well. View Data and Diagnostic Attachments opens the Choose Diagnostic Data Adapter Attachment dialog box to select an adapter to analyse the result type. For example, you can select an IntelliTrace adapter, click OK and open the IntelliTrace summary for the test agent that was used in the load test.   Compare results This creates a set of reports that compares the data from two load test results using tables and bar charts. I have taken these screen shots from the MSDN documentation, I would highly recommend exploring the wealth of knowledge available on MSDN. Leaving Thoughts While load testing the application with an excessive load for a longer duration of time, i managed to bring the IIS to its knees by piling up a huge queue of requests waiting to be processed. This clearly means that the IIS had run out of threads as all the threads were busy processing existing request, one easy way of fixing this is by increasing the default number of allocated threads, but this might escalate the problem. The better suggestion is to try and drill down to the actual root cause of the problem. When ever the garbage collection runs it stops processing any pages so all requests that come in during that period are queued up, but realistically the garbage collection completes in fraction of a a second. To understand this better lets look at the .net heap, it is divided into large heap and small heap, anything greater than 85kB in size will be allocated to the Large object heap, the Large object heap is non compacting and remember large objects are expensive to move around, so if you are allocating something in the large object heap, make sure that you really need it! The small object heap on the other hand is divided into generations, so all objects that are supposed to be short-lived are suppose to live in Gen-0 and the long living objects eventually move to Gen-2 as garbage collection goes through.  As you can see in the picture below all < 85 KB size objects are first assigned to Gen-0, when Gen-0 fills up and a new object comes in and finds Gen-0 full, the garbage collection process is started, the process checks for all the dead objects and assigns them as the valid candidate for deletion to free up memory and promotes all the remaining objects in Gen-0 to Gen-1. So in the future when ever you clean up Gen-1 you have to clean up Gen-0 as well. When you fill up Gen – 0 again, all of Gen – 1 dead objects are drenched and rest are moved to Gen-2 and Gen-0 objects are moved to Gen-1 to free up Gen-0, but by this time your Garbage collection process has started to take much more time than it usually takes. Now as I mentioned earlier when garbage collection is being run all page requests that come in during that period are queued up. Does this explain why possibly page requests are getting queued up, apart from this it could also be the case that you are waiting for a long running database process to complete.      Lets explore the heap a bit more… What is really a case of crisis is when the objects are living long enough to make it to Gen-2 and then dying, this is definitely a high cost operation. But sometimes you need objects in memory, for example when you cache data you hold on to the objects because you need to use them right across the user session, which is acceptable. But if you wanted to see what extreme caching can do to your server then write a simple application that chucks in a lot of data in cache, run a load test over it for about 10-15 minutes, forcing a lot of data in memory causing the heap to run out of memory. If you get to such a state where you start running out of memory the IIS as a mode of recovery restarts the worker process. It is great way to free up all your memory in the heap but this would clear the cache. The problem with this is if the customer had 10 items in their shopping basket and that data was stored in the application cache, the user basket will now be empty forcing them either to get frustrated and go to a competitor website or if the customer is really patient, give it another try! How can you address this, well two ways of addressing this; 1. Workaround – A x86 bit processor only allows a maximum of 4GB of RAM, this means the machine effectively has around 3.4 GB of RAM available, the OS needs about 1.5 GB of RAM to run efficiently, the IIS and .net framework also need their share of memory, leaving you a heap of around 800 MB to play with. Because Team builds by default build your application in ‘Compile as any mode’ it means the application is build such that it will run in x86 bit mode if run on a x86 bit processor and run in a x64 bit mode if run on a x64 but processor. The problem with this is not all applications are really x64 bit compatible specially if you are using com objects or external libraries. So, as a quick win if you compiled your application in x86 bit mode by changing the compile as any selection to compile as x86 in the team build, you will be able to run your application on a x64 bit machine in x86 bit mode (WOW – By running Windows on Windows) and what that means is, you could use 8GB+ worth of RAM, if you take away everything else your application will roughly get a heap size of at least 4 GB to play with, which is immense. If you need a heap size of more than 4 GB you have either build a software for NASA or there is something fundamentally wrong in your application. 2. Solution – Now that you have put a workaround in place the IIS will not restart the worker process that regularly, which means you can take a breather and start working to get to the root cause of this memory leak. But this begs a question “How do I Identify possible memory leaks in my application?” Well i won’t say that there is one single tool that can tell you where the memory leak is, but trust me, ‘Performance Profiling’ is a great start point, it definitely gets you started in the right direction, let’s have a look at how. Performance Wizard - Start the Performance Wizard and select Instrumentation, this lets you measure function call counts and timings. Before running the performance session right click the performance session settings and chose properties from the context menu to bring up the Performance session properties page and as shown in the screen shot below, check the check boxes in the group ‘.NET memory profiling collection’ namely ‘Collect .NET object allocation information’ and ‘Also collect the .NET Object lifetime information’.    Now if you fire off the profiling session on your pages you will notice that the results allows you to view ‘Object Lifetime’ which shows you the number of objects that made it to Gen-0, Gen-1, Gen-2, Large heap, etc. Another great feature about the profile is that if your application has > 5% cases where objects die right after making to the Gen-2 storage a threshold alert is generated to alert you. Since you have the option to also view the most expensive methods and by capturing the IntelliTrace data you can drill in to narrow down to the line of code that is the root cause of the problem. Well now that we have seen how crucial memory management is and how easy Visual Studio Ultimate 2010 makes it for us to identify and reproduce the problem with the best of breed tools in the product. Caching One of the main ways to improve performance is Caching. Which basically means you tell the web server that instead of going to the database for each request you keep the data in the webserver and when the user asks for it you serve it from the webserver itself. BUT that can have consequences! Let’s look at some code, trust me caching code is not very intuitive, I define a cache key for almost all searches made through the common search page and cache the results. The approach works fine, first time i get the data from the database and second time data is served from the cache, significant performance improvement, EXCEPT when two users try to do the same operation and run into each other. But it is easy to handle this by adding the lock as you can see in the snippet below. So, as long as a user comes in and finds that the cache is empty, the user locks and starts to get the cache no more concurrency issues. But lets say you are processing 10 requests per second, by the time i have locked the operation to get the results from the database, 9 other users came in and found that the cache key is null so after i have come out and populated the cache they will still go in to get the results again. The application will still be faster because the next set of 10 users and so on would continue to get data from the cache. BUT if we added another null check after locking to build the cache and before actual call to the db then the 9 users who follow me would not make the extra trip to the database at all and that would really increase the performance, but didn’t i say that the code won’t be very intuitive, may be you should leave a comment you don’t want another developer to come in and think what a fresher why is he checking for the cache key null twice !!! The downside of caching is, you are storing the data outside of the database and the data could be wrong because the updates applied to the database would make the data cached at the web server out of sync. So, how do you invalidate the cache? Well if you only had one way of updating the data lets say only one entry point to the data update you can write some logic to say that every time new data is entered set the cache object to null. But this approach will not work as soon as you have several ways of feeding data to the system or your system is scaled out across a farm of web servers. The perfect solution to this is Micro Caching which means you cache the query for a set time duration and invalidate the cache after that set duration. The advantage is every time the user queries for that data with in the time span for which you have cached the results there are no calls made to the database and the data is served right from the server which makes the response immensely quick. Now figuring out the appropriate time span for which you micro cache the query results really depends on the application. Lets say your website gets 10 requests per second, if you retain the cache results for even 1 minute you will have immense performance gains. You would reduce 90% hits to the database for searching. Ever wondered why when you go to e-bookers.com or xpedia.com or yatra.com to book a flight and you click on the book button because the fare seems too exciting and you get an error message telling you that the fare is not valid any more. Yes, exactly => That is a cache failure! These travel sites or price compare engines are not going to hit the database every time you hit the compare button instead the results will be served from the cache, because the query results are micro cached, its a perfect trade-off, by micro caching the results the site gains 100% performance benefits but every once in a while annoys a customer because the fare has expired. But the trade off works in the favour of these sites as they are still able to process up to 30+ page requests per second which means cater to the site traffic by may be losing 1 customer every once in a while to a competitor who is also using a similar caching technique what are the odds that the user will not come back to their site sooner or later? Recap   Resources Below are some Key resource you might like to review. I would highly recommend the documentation, walkthroughs and videos available on MSDN. You can always make use of Fiddler to debug Web Performance Tests. Some community test extensions and plug ins available on Codeplex might also be of interest to you. The Road Ahead Thank you for taking the time out and reading this blog post, you may also want to read Part I and Part II if you haven’t so far. If you enjoyed the post, remember to subscribe to http://feeds.feedburner.com/TarunArora. Questions/Feedback/Suggestions, etc please leave a comment. Next ‘Load Testing in the cloud’, I’ll be working on exploring the possibilities of running Test controller/Agents in the Cloud. See you on the other side! Thank You!   Share this post : CodeProject

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• Windows Phone 7: Building a simple dictionary web client

  - by TechTwaddle

  Like I mentioned in this post a while back, I came across a dictionary web service called Aonaware that serves up word definitions from various dictionaries and is really easy to use. The services page on their website, http://services.aonaware.com/DictService/DictService.asmx, lists all the operations that are supported by the dictionary service. Here they are, Word Dictionary Web Service The following operations are supported. For a formal definition, please review the Service Description. Define Define given word, returning definitions from all dictionaries DefineInDict Define given word, returning definitions from specified dictionary DictionaryInfo Show information about the specified dictionary DictionaryList Returns a list of available dictionaries DictionaryListExtended Returns a list of advanced dictionaries (e.g. translating dictionaries) Match Look for matching words in all dictionaries using the given strategy MatchInDict Look for matching words in the specified dictionary using the given strategy ServerInfo Show remote server information StrategyList Return list of all available strategies on the server Follow the links above to get more information on each API. In this post we will be building a simple windows phone 7 client which uses this service to get word definitions for words entered by the user. The application will also allow the user to select a dictionary from all the available ones and look up the word definition in that dictionary. So of all the apis above we will be using only two, DictionaryList() to get a list of all supported dictionaries and DefineInDict() to get the word definition from a particular dictionary. Before we get started, a note to you all; I would have liked to implement this application using concepts from data binding, item templates, data templates etc. I have a basic understanding of what they are but, being a beginner, I am not very comfortable with those topics yet so I didn’t use them. I thought I’ll get this version out of the way and maybe in the next version I could give those a try. A somewhat scary mock-up of the what the final application will look like, Select Dictionary is a list picker control from the silverlight toolkit (you need to download and install the toolkit if you haven’t already). Below it is a textbox where the user can enter words to look up and a button beside it to fetch the word definition when clicked. Finally we have a textblock which occupies the remaining area and displays the word definition from the selected dictionary. Create a silverlight application for windows phone 7, AonawareDictionaryClient, and add references to the silverlight toolkit and the web service. From the solution explorer right on References and select Microsoft.Phone.Controls.Toolkit from under the .NET tab, Next, add a reference to the web service. Again right click on References and this time select Add Service Reference In the resulting dialog paste the service url in the Address field and press go, (url –> http://services.aonaware.com/DictService/DictService.asmx) once the service is discovered, provide a name for the NameSpace, in this case I’ve called it AonawareDictionaryService. Press OK. You can now use the classes and functions that are generated in the AonawareDictionaryClient.AonawareDictionaryService namespace. Let’s get the UI done now. In MainPage.xaml add a namespace declaration to use the toolkit controls, xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit" the content of LayoutRoot is changed as follows, (sorry, no syntax highlighting in this post) <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,5,0,5">     <TextBlock x:Name="ApplicationTitle" Text="AONAWARE DICTIONARY CLIENT" Style="{StaticResource PhoneTextNormalStyle}"/>     <!--<TextBlock x:Name="PageTitle" Text="page name" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>--> </StackPanel> <!--ContentPanel - place additional content here--> <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">     <Grid.RowDefinitions>         <RowDefinition Height="Auto"/>         <RowDefinition Height="Auto"/>         <RowDefinition Height="*"/>     </Grid.RowDefinitions>     <toolkit:ListPicker Grid.Column="1" x:Name="listPickerDictionaryList"                         Header="Select Dictionary :">     </toolkit:ListPicker>     <Grid Grid.Row="1" Margin="0,5,0,0">         <Grid.ColumnDefinitions>             <ColumnDefinition Width="*"/>             <ColumnDefinition Width="Auto" />         </Grid.ColumnDefinitions>         <TextBox x:Name="txtboxInputWord" Grid.Column="0" GotFocus="OnTextboxInputWordGotFocus" />         <Button x:Name="btnGo" Grid.Column="1" Click="OnButtonGoClick" >             <Button.Content>                 <Image Source="/images/button-go.png"/>             </Button.Content>         </Button>     </Grid>     <ScrollViewer Grid.Row="2" x:Name="scrollViewer">         <TextBlock  Margin="12,5,12,5"  x:Name="txtBlockWordMeaning" HorizontalAlignment="Stretch"                    VerticalAlignment="Stretch" TextWrapping="Wrap"                    FontSize="26" />     </ScrollViewer> </Grid> I have commented out the PageTitle as it occupies too much valuable space, and the ContentPanel is changed to contain three rows. First row contains the list picker control, second row contains the textbox and the button, and the third row contains a textblock within a scroll viewer. The designer will now be showing the final ui, Now go to MainPage.xaml.cs, and add the following namespace declarations, using Microsoft.Phone.Controls; using AonawareDictionaryClient.AonawareDictionaryService; using System.IO.IsolatedStorage; A class called DictServiceSoapClient would have been created for you in the background when you added a reference to the web service. This class functions as a wrapper to the services exported by the web service. All the web service functions that we saw at the start can be access through this class, or more precisely through an object of this class. Create a data member of type DictServiceSoapClient in the Mainpage class, and a function which initializes it, DictServiceSoapClient DictSvcClient = null; private DictServiceSoapClient GetDictServiceSoapClient() {     if (null == DictSvcClient)     {         DictSvcClient = new DictServiceSoapClient();     }     return DictSvcClient; } We have two major tasks remaining. First, when the application loads we need to populate the list picker with all the supported dictionaries and second, when the user enters a word and clicks on the arrow button we need to fetch the word’s meaning. Populating the List Picker In the OnNavigatingTo event of the MainPage, we call the DictionaryList() api. This can also be done in the OnLoading event handler of the MainPage; not sure if one has an advantage over the other. Here’s the code for OnNavigatedTo, protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e) {     DictServiceSoapClient client = GetDictServiceSoapClient();     client.DictionaryListCompleted += new EventHandler<DictionaryListCompletedEventArgs>(OnGetDictionaryListCompleted);     client.DictionaryListAsync();     base.OnNavigatedTo(e); } Windows Phone 7 supports only async calls to web services. When we added a reference to the dictionary service, asynchronous versions of all the functions were generated automatically. So in the above function we register a handler to the DictionaryListCompleted event which will occur when the call to DictionaryList() gets a response from the server. Then we call the DictionaryListAsynch() function which is the async version of the DictionaryList() api. The result of this api will be sent to the handler OnGetDictionaryListCompleted(), void OnGetDictionaryListCompleted(object sender, DictionaryListCompletedEventArgs e) {     IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;     Dictionary[] listOfDictionaries;     if (e.Error == null)     {         listOfDictionaries = e.Result;         PopulateListPicker(listOfDictionaries, settings);     }     else if (settings.Contains("SavedDictionaryList"))     {         listOfDictionaries = settings["SavedDictionaryList"] as Dictionary[];         PopulateListPicker(listOfDictionaries, settings);     }     else     {         MessageBoxResult res = MessageBox.Show("An error occured while retrieving dictionary list, do you want to try again?", "Error", MessageBoxButton.OKCancel);         if (MessageBoxResult.OK == res)         {             GetDictServiceSoapClient().DictionaryListAsync();         }     }     settings.Save(); } I have used IsolatedStorageSettings to store a few things; the entire dictionary list and the dictionary that is selected when the user exits the application, so that the next time when the user starts the application the current dictionary is set to the last selected value. First we check if the api returned any error, if the error object is null e.Result will contain the list (actually array) of Dictionary type objects. If there was an error, we check the isolated storage settings to see if there is a dictionary list stored from a previous instance of the application and if so, we populate the list picker based on this saved list. Note that in this case there are chances that the dictionary list might be out of date if there have been changes on the server. Finally, if none of these cases are true, we display an error message to the user and try to fetch the list again. PopulateListPicker() is passed the array of Dictionary objects and the settings object as well, void PopulateListPicker(Dictionary[] listOfDictionaries, IsolatedStorageSettings settings) {     listPickerDictionaryList.Items.Clear();     foreach (Dictionary dictionary in listOfDictionaries)     {         listPickerDictionaryList.Items.Add(dictionary.Name);     }     settings["SavedDictionaryList"] = listOfDictionaries;     string savedDictionaryName;     if (settings.Contains("SavedDictionary"))     {         savedDictionaryName = settings["SavedDictionary"] as string;     }     else     {         savedDictionaryName = "WordNet (r) 2.0"; //default dictionary, wordnet     }     foreach (string dictName in listPickerDictionaryList.Items)     {         if (dictName == savedDictionaryName)         {             listPickerDictionaryList.SelectedItem = dictName;             break;         }     }     settings["SavedDictionary"] = listPickerDictionaryList.SelectedItem as string; } We first clear all the items from the list picker, add the dictionary names from the array and then create a key in the settings called SavedDictionaryList and store the dictionary list in it. We then check if there is saved dictionary available from a previous instance, if there is, we set it as the selected item in the list picker. And if not, we set “WordNet ® 2.0” as the default dictionary. Before returning, we save the selected dictionary in the “SavedDictionary” key of the isolated storage settings. Fetching word definitions Getting this part done is very similar to the above code. We get the input word from the textbox, call into DefineInDictAsync() to fetch the definition and when DefineInDictAsync completes, we get the result and display it in the textblock. Here is the handler for the button click, private void OnButtonGoClick(object sender, RoutedEventArgs e) {     txtBlockWordMeaning.Text = "Please wait..";     IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;     if (txtboxInputWord.Text.Trim().Length <= 0)     {         MessageBox.Show("Please enter a word in the textbox and press 'Go'");     }     else     {         Dictionary[] listOfDictionaries = settings["SavedDictionaryList"] as Dictionary[];         string selectedDictionary = listPickerDictionaryList.SelectedItem.ToString();         string dictId = "wn"; //default dictionary is wordnet (wn is the dict id)         foreach (Dictionary dict in listOfDictionaries)         {             if (dict.Name == selectedDictionary)             {                 dictId = dict.Id;                 break;             }         }         DictServiceSoapClient client = GetDictServiceSoapClient();         client.DefineInDictCompleted += new EventHandler<DefineInDictCompletedEventArgs>(OnDefineInDictCompleted);         client.DefineInDictAsync(dictId, txtboxInputWord.Text.Trim());     } } We validate the input and then select the dictionary id based on the currently selected dictionary. We need the dictionary id because the api DefineInDict() expects the dictionary identifier and not the dictionary name. We could very well have stored the dictionary id in isolated storage settings too. Again, same as before, we register a event handler for the DefineInDictCompleted event and call the DefineInDictAsync() method passing in the dictionary id and the input word. void OnDefineInDictCompleted(object sender, DefineInDictCompletedEventArgs e) {     WordDefinition wd = e.Result;     scrollViewer.ScrollToVerticalOffset(0.0f);     if (wd.Definitions.Length == 0)     {         txtBlockWordMeaning.Text = String.Format("No definitions were found for '{0}' in '{1}'", txtboxInputWord.Text.Trim(), listPickerDictionaryList.SelectedItem.ToString().Trim());     }     else     {         foreach (Definition def in wd.Definitions)         {             string str = def.WordDefinition;             str = str.Replace("  ", " "); //some formatting             txtBlockWordMeaning.Text = str;         }     } } When the api completes, e.Result will contain a WordDefnition object. This class is also generated in the background while adding the service reference. We check the word definitions within this class to see if any results were returned, if not, we display a message to the user in the textblock. If a definition was found the text on the textblock is set to display the definition of the word. Adding final touches, we now need to save the current dictionary when the application exits. A small but useful thing is selecting the entire word in the input textbox when the user selects it. This makes sure that if the user has looked up a definition for a really long word, he doesn’t have to press ‘clear’ too many times to enter the next word, protected override void OnNavigatingFrom(System.Windows.Navigation.NavigatingCancelEventArgs e) {     IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;     settings["SavedDictionary"] = listPickerDictionaryList.SelectedItem as string;     settings.Save();     base.OnNavigatingFrom(e); } private void OnTextboxInputWordGotFocus(object sender, RoutedEventArgs e) {     TextBox txtbox = sender as TextBox;     if (txtbox.Text.Trim().Length > 0)     {         txtbox.SelectionStart = 0;         txtbox.SelectionLength = txtbox.Text.Length;     } } OnNavigatingFrom() is called whenever you navigate away from the MainPage, since our application contains only one page that would mean that it is exiting. I leave you with a short video of the application in action, but before that if you have any suggestions on how to make the code better and improve it please do leave a comment. Until next time…

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• Windows Azure Service Bus Scatter-Gather Implementation

  - by Alan Smith

  One of the more challenging enterprise integration patterns that developers may wish to implement is the Scatter-Gather pattern. In this article I will show the basic implementation of a scatter-gather pattern using the topic-subscription model of the windows azure service bus. I’ll be using the implementation in demos, and also as a lab in my training courses, and the pattern will also be included in the next release of my free e-book the “Windows Azure Service Bus Developer Guide”. The Scatter-Gather pattern answers the following scenario. How do you maintain the overall message flow when a message needs to be sent to multiple recipients, each of which may send a reply? Use a Scatter-Gather that broadcasts a message to multiple recipients and re-aggregates the responses back into a single message. The Enterprise Integration Patterns website provides a description of the Scatter-Gather pattern here.   The scatter-gather pattern uses a composite of the publish-subscribe channel pattern and the aggregator pattern. The publish-subscribe channel is used to broadcast messages to a number of receivers, and the aggregator is used to gather the response messages and aggregate them together to form a single message. Scatter-Gather Scenario The scenario for this scatter-gather implementation is an application that allows users to answer questions in a poll based voting scenario. A poll manager application will be used to broadcast questions to users, the users will use a voting application that will receive and display the questions and send the votes back to the poll manager. The poll manager application will receive the users’ votes and aggregate them together to display the results. The scenario should be able to scale to support a large number of users.   Scatter-Gather Implementation The diagram below shows the overall architecture for the scatter-gather implementation.       Messaging Entities Looking at the scatter-gather pattern diagram it can be seen that the topic-subscription architecture is well suited for broadcasting a message to a number of subscribers. The poll manager application can send the question messages to a topic, and each voting application can receive the question message on its own subscription. The static limit of 2,000 subscriptions per topic in the current release means that 2,000 voting applications can receive question messages and take part in voting. The vote messages can then be sent to the poll manager application using a queue. The voting applications will send their vote messages to the queue, and the poll manager will receive and process the vote messages. The questions topic and answer queue are created using the Windows Azure Developer Portal. Each instance of the voting application will create its own subscription in the questions topic when it starts, allowing the question messages to be broadcast to all subscribing voting applications. Data Contracts Two simple data contracts will be used to serialize the questions and votes as brokered messages. The code for these is shown below.   [DataContract] public class Question {     [DataMember]     public string QuestionText { get; set; } }     To keep the implementation of the voting functionality simple and focus on the pattern implementation, the users can only vote yes or no to the questions.   [DataContract] public class Vote {     [DataMember]     public string QuestionText { get; set; }       [DataMember]     public bool IsYes { get; set; } }     Poll Manager Application The poll manager application has been implemented as a simple WPF application; the user interface is shown below. A question can be entered in the text box, and sent to the topic by clicking the Add button. The topic and subscriptions used for broadcasting the messages are shown in a TreeView control. The questions that have been broadcast and the resulting votes are shown in a ListView control. When the application is started any existing subscriptions are cleared form the topic, clients are then created for the questions topic and votes queue, along with background workers for receiving and processing the vote messages, and updating the display of subscriptions.   public MainWindow() {     InitializeComponent();       // Create a new results list and data bind it.     Results = new ObservableCollection<Result>();     lsvResults.ItemsSource = Results;       // Create a token provider with the relevant credentials.     TokenProvider credentials =         TokenProvider.CreateSharedSecretTokenProvider         (AccountDetails.Name, AccountDetails.Key);       // Create a URI for the serivce bus.     Uri serviceBusUri = ServiceBusEnvironment.CreateServiceUri         ("sb", AccountDetails.Namespace, string.Empty);       // Clear out any old subscriptions.     NamespaceManager = new NamespaceManager(serviceBusUri, credentials);     IEnumerable<SubscriptionDescription> subs =         NamespaceManager.GetSubscriptions(AccountDetails.ScatterGatherTopic);     foreach (SubscriptionDescription sub in subs)     {         NamespaceManager.DeleteSubscription(sub.TopicPath, sub.Name);     }       // Create the MessagingFactory     MessagingFactory factory = MessagingFactory.Create(serviceBusUri, credentials);       // Create the topic and queue clients.     ScatterGatherTopicClient =         factory.CreateTopicClient(AccountDetails.ScatterGatherTopic);     ScatterGatherQueueClient =         factory.CreateQueueClient(AccountDetails.ScatterGatherQueue);       // Start the background worker threads.     VotesBackgroundWorker = new BackgroundWorker();     VotesBackgroundWorker.DoWork += new DoWorkEventHandler(ReceiveMessages);     VotesBackgroundWorker.RunWorkerAsync();       SubscriptionsBackgroundWorker = new BackgroundWorker();     SubscriptionsBackgroundWorker.DoWork += new DoWorkEventHandler(UpdateSubscriptions);     SubscriptionsBackgroundWorker.RunWorkerAsync(); }     When the poll manager user nters a question in the text box and clicks the Add button a question message is created and sent to the topic. This message will be broadcast to all the subscribing voting applications. An instance of the Result class is also created to keep track of the votes cast, this is then added to an observable collection named Results, which is data-bound to the ListView control.   private void btnAddQuestion_Click(object sender, RoutedEventArgs e) {     // Create a new result for recording votes.     Result result = new Result()     {         Question = txtQuestion.Text     };     Results.Add(result);       // Send the question to the topic     Question question = new Question()     {         QuestionText = result.Question     };     BrokeredMessage msg = new BrokeredMessage(question);     ScatterGatherTopicClient.Send(msg);       txtQuestion.Text = ""; }     The Results class is implemented as follows.   public class Result : INotifyPropertyChanged {     public string Question { get; set; }       private int m_YesVotes;     private int m_NoVotes;       public event PropertyChangedEventHandler PropertyChanged;       public int YesVotes     {         get { return m_YesVotes; }         set         {             m_YesVotes = value;             NotifyPropertyChanged("YesVotes");         }     }       public int NoVotes     {         get { return m_NoVotes; }         set         {             m_NoVotes = value;             NotifyPropertyChanged("NoVotes");         }     }       private void NotifyPropertyChanged(string prop)     {         if(PropertyChanged != null)         {             PropertyChanged(this, new PropertyChangedEventArgs(prop));         }     } }     The INotifyPropertyChanged interface is implemented so that changes to the number of yes and no votes will be updated in the ListView control. Receiving the vote messages from the voting applications is done asynchronously, using a background worker thread.   // This runs on a background worker. private void ReceiveMessages(object sender, DoWorkEventArgs e) {     while (true)     {         // Receive a vote message from the queue         BrokeredMessage msg = ScatterGatherQueueClient.Receive();         if (msg != null)         {             // Deserialize the message.             Vote vote = msg.GetBody<Vote>();               // Update the results.             foreach (Result result in Results)             {                 if (result.Question.Equals(vote.QuestionText))                 {                     if (vote.IsYes)                     {                         result.YesVotes++;                     }                     else                     {                         result.NoVotes++;                     }                     break;                 }             }               // Mark the message as complete.             msg.Complete();         }       } }     When a vote message is received, the result that matches the vote question is updated with the vote from the user. The message is then marked as complete. A second background thread is used to update the display of subscriptions in the TreeView, with a dispatcher used to update the user interface. // This runs on a background worker. private void UpdateSubscriptions(object sender, DoWorkEventArgs e) {     while (true)     {         // Get a list of subscriptions.         IEnumerable<SubscriptionDescription> subscriptions =             NamespaceManager.GetSubscriptions(AccountDetails.ScatterGatherTopic);           // Update the user interface.         SimpleDelegate setQuestion = delegate()         {             trvSubscriptions.Items.Clear();             TreeViewItem topicItem = new TreeViewItem()             {                 Header = AccountDetails.ScatterGatherTopic             };               foreach (SubscriptionDescription subscription in subscriptions)             {                 TreeViewItem subscriptionItem = new TreeViewItem()                 {                     Header = subscription.Name                 };                 topicItem.Items.Add(subscriptionItem);             }             trvSubscriptions.Items.Add(topicItem);               topicItem.ExpandSubtree();         };         this.Dispatcher.BeginInvoke(DispatcherPriority.Send, setQuestion);           Thread.Sleep(3000);     } }       Voting Application The voting application is implemented as another WPF application. This one is more basic, and allows the user to vote “Yes” or “No” for the questions sent by the poll manager application. The user interface for that application is shown below. When an instance of the voting application is created it will create a subscription in the questions topic using a GUID as the subscription name. The application can then receive copies of every question message that is sent to the topic. Clients for the new subscription and the votes queue are created, along with a background worker to receive the question messages. The voting application is set to receiving mode, meaning it is ready to receive a question message from the subscription.   public MainWindow() {     InitializeComponent();       // Set the mode to receiving.     IsReceiving = true;       // Create a token provider with the relevant credentials.     TokenProvider credentials =         TokenProvider.CreateSharedSecretTokenProvider         (AccountDetails.Name, AccountDetails.Key);       // Create a URI for the serivce bus.     Uri serviceBusUri = ServiceBusEnvironment.CreateServiceUri         ("sb", AccountDetails.Namespace, string.Empty);       // Create the MessagingFactory     MessagingFactory factory = MessagingFactory.Create(serviceBusUri, credentials);       // Create a subcription for this instance     NamespaceManager mgr = new NamespaceManager(serviceBusUri, credentials);     string subscriptionName = Guid.NewGuid().ToString();     mgr.CreateSubscription(AccountDetails.ScatterGatherTopic, subscriptionName);       // Create the subscription and queue clients.     ScatterGatherSubscriptionClient = factory.CreateSubscriptionClient         (AccountDetails.ScatterGatherTopic, subscriptionName);     ScatterGatherQueueClient =         factory.CreateQueueClient(AccountDetails.ScatterGatherQueue);       // Start the background worker thread.     BackgroundWorker = new BackgroundWorker();     BackgroundWorker.DoWork += new DoWorkEventHandler(ReceiveMessages);     BackgroundWorker.RunWorkerAsync(); }     I took the inspiration for creating the subscriptions in the voting application from the chat application that uses topics and subscriptions blogged by Ovais Akhter here. The method that receives the question messages runs on a background thread. If the application is in receive mode, a question message will be received from the subscription, the question will be displayed in the user interface, the voting buttons enabled, and IsReceiving set to false to prevent more questing from being received before the current one is answered.   // This runs on a background worker. private void ReceiveMessages(object sender, DoWorkEventArgs e) {     while (true)     {         if (IsReceiving)         {             // Receive a question message from the topic.             BrokeredMessage msg = ScatterGatherSubscriptionClient.Receive();             if (msg != null)             {                 // Deserialize the message.                 Question question = msg.GetBody<Question>();                   // Update the user interface.                 SimpleDelegate setQuestion = delegate()                 {                     lblQuestion.Content = question.QuestionText;                     btnYes.IsEnabled = true;                     btnNo.IsEnabled = true;                 };                 this.Dispatcher.BeginInvoke(DispatcherPriority.Send, setQuestion);                 IsReceiving = false;                   // Mark the message as complete.                 msg.Complete();             }         }         else         {             Thread.Sleep(1000);         }     } }     When the user clicks on the Yes or No button, the btnVote_Click method is called. This will create a new Vote data contract with the appropriate question and answer and send the message to the poll manager application using the votes queue. The user voting buttons are then disabled, the question text cleared, and the IsReceiving flag set to true to allow a new message to be received.   private void btnVote_Click(object sender, RoutedEventArgs e) {     // Create a new vote.     Vote vote = new Vote()     {         QuestionText = (string)lblQuestion.Content,         IsYes = ((sender as Button).Content as string).Equals("Yes")     };       // Send the vote message.     BrokeredMessage msg = new BrokeredMessage(vote);     ScatterGatherQueueClient.Send(msg);       // Update the user interface.     lblQuestion.Content = "";     btnYes.IsEnabled = false;     btnNo.IsEnabled = false;     IsReceiving = true; }     Testing the Application In order to test the application, an instance of the poll manager application is started; the user interface is shown below. As no instances of the voting application have been created there are no subscriptions present in the topic. When an instance of the voting application is created the subscription will be displayed in the poll manager. Now that a voting application is subscribing, a questing can be sent from the poll manager application. When the message is sent to the topic, the voting application will receive the message and display the question. The voter can then answer the question by clicking on the appropriate button. The results of the vote are updated in the poll manager application. When two more instances of the voting application are created, the poll manager will display the new subscriptions. More questions can then be broadcast to the voting applications. As the question messages are queued up in the subscription for each voting application, the users can answer the questions in their own time. The vote messages will be received by the poll manager application and aggregated to display the results. The screenshots of the applications part way through voting are shown below. The messages for each voting application are queued up in sequence on the voting application subscriptions, allowing the questions to be answered at different speeds by the voters.

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• Android - How do I load a contact Photo?

  - by PaulH

  I'm having trouble loading a photo for a contact in Android. I've googled for an answer, but so far have come up empty. Does anyone have an example of querying for a Contact, then loading the Photo? So, given a contactUri which comes from an Activity result called using startActivityForResult(new Intent(Intent.ACTION_PICK,ContactsContract.CommonDataKinds.Phone.CONTENT_URI),PICK_CONTACT_REQUEST) is: content://com.android.contacts/data/1557 The loadContact(..) works fine. However when I call the getPhoto(...) method, I get a null value for the photo InputStream. It is also confusing because the URI values are different. The contactPhotoUri evaluates to: content://com.android.contacts/contacts/1557 See the comments inline in the code below. class ContactAccessor { /** * Retrieves the contact information. */ public ContactInfo loadContact(ContentResolver contentResolver, Uri contactUri) { //contactUri --> content://com.android.contacts/data/1557 ContactInfo contactInfo = new ContactInfo(); // Load the display name for the specified person Cursor cursor = contentResolver.query(contactUri, new String[]{Contacts._ID, Contacts.DISPLAY_NAME, Phone.NUMBER, Contacts.PHOTO_ID}, null, null, null); try { if (cursor.moveToFirst()) { contactInfo.setId(cursor.getLong(0)); contactInfo.setDisplayName(cursor.getString(1)); contactInfo.setPhoneNumber(cursor.getString(2)); } } finally { cursor.close(); } return contactInfo; // <-- returns info for contact } public Bitmap getPhoto(ContentResolver contentResolver, Long contactId) { Uri contactPhotoUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, contactId); // contactPhotoUri --> content://com.android.contacts/contacts/1557 InputStream photoDataStream = Contacts.openContactPhotoInputStream(contentResolver,contactPhotoUri); // <-- always null Bitmap photo = BitmapFactory.decodeStream(photoDataStream); return photo; } public class ContactInfo { private long id; private String displayName; private String phoneNumber; private Uri photoUri; public void setDisplayName(String displayName) { this.displayName = displayName; } public String getDisplayName() { return displayName; } public void setPhoneNumber(String phoneNumber) { this.phoneNumber = phoneNumber; } public String getPhoneNumber() { return phoneNumber; } public Uri getPhotoUri() { return this.photoUri; } public void setPhotoUri(Uri photoUri) { this.photoUri = photoUri; } public long getId() { return this.id; } public void setId(long id) { this.id = id; } } } Clearly, I'm doing something wrong here, but I can't seem to figure out what the problem is. Thanks.

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• AddHandler not working?

  - by EdenMachine

  I can't figure out why my addhandler is not firing? In the Sub "CreateTagStyle" thd AddHandler is to firing when the LinkButton is clicked Is there some reason that addhandlers can't be adding at certain points of the page lifecycle? <%@ Page Title="" Language="VB" MasterPageFile="~/_Common/Admin.master" %> <script runat="server"> Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) End Sub Protected Sub RadGrid1_NeedDataSource(ByVal source As Object, ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) If Not e.IsFromDetailTable Then Dim forms As New MB.RequestFormPacket() RadGrid1.DataSource = forms.GetPackets() End If End Sub Protected Sub RadGrid1_DetailTableDataBind(ByVal source As Object, ByVal e As Telerik.Web.UI.GridDetailTableDataBindEventArgs) Select Case e.DetailTableView.Name Case "gtvForms" Dim PacketID As Guid = e.DetailTableView.ParentItem.GetDataKeyValue("ID") e.DetailTableView.DataSource = MB.RequestForm.GetRequestForms(PacketID) End Select End Sub Protected Sub RadGrid1_InsertCommand(ByVal source As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) If IsValid Then Select Case TryCast(e.Item.NamingContainer.NamingContainer, GridTableView).Name Case "gtvPackets" Dim rtbName As RadTextBox = TryCast(e.Item.FindControl("rtbName"), RadTextBox) Dim IsActive As Boolean = TryCast(e.Item.FindControl("cbxIsActive"), CheckBox).Checked Dim packet As New MB.RequestFormPacket() packet.Name = rtbName.Text packet.IsActive = IsActive packet.Insert() e.Canceled = True e.Item.OwnerTableView.IsItemInserted = False RadGrid1.Rebind() System.Web.UI.ScriptManager.RegisterStartupScript(Me.Page, Me.GetType(), "ClientMessage", "SuccessMessage('Request Form Packet has been added successfully.');", True) Case "gtvForms" Dim parentItem As GridDataItem = e.Item.OwnerTableView.ParentItem Dim rcbForms As RadComboBox = TryCast(e.Item.FindControl("rcbForms"), RadComboBox) Dim rf As New MB.RequestForm() rf.RequestFormPacketID = CType(parentItem.OwnerTableView.DataKeyValues(parentItem.ItemIndex)("ID"), Guid) rf.FormID = rcbForms.SelectedValue If MB.RequestFormPacket.HasItems(rf.RequestFormPacketID) Then rf.SortOrder = rf.MaxSortOrder + 1 Else rf.SortOrder = 0 End If rf.Insert() e.Canceled = True e.Item.OwnerTableView.IsItemInserted = False TryCast(e.Item.NamingContainer.NamingContainer, GridTableView).Rebind() End Select End If End Sub Protected Sub RadGrid1_UpdateCommand(ByVal source As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) If IsValid Then Select Case TryCast(e.Item.NamingContainer, GridTableView).Name Case "gtvPackets" Dim PacketID As Guid = CType(CType(e.CommandSource, Button).NamingContainer, GridEditFormItem).GetDataKeyValue("ID") Dim Name As String = TryCast(e.Item.FindControl("rtbName"), RadTextBox).Text Dim Tags As String = TryCast(e.Item.FindControl("hdnTags"), HiddenField).Value Dim IsActive As Boolean = TryCast(e.Item.FindControl("cbxIsActive"), CheckBox).Checked Dim rfp As New MB.RequestFormPacket() rfp.Update(PacketID, Name, IsActive) Call MB.RequestFormPacketTag.Insert(PacketID, Tags) e.Item.Edit = False TryCast(e.Item.NamingContainer, GridTableView).Rebind() System.Web.UI.ScriptManager.RegisterStartupScript(Me.Page, Me.GetType(), "ClientMessage", "SuccessMessage('Request Form Packet has been updated successfully.');", True) Case "gtvForms" Dim RequestFormID As Guid = CType(CType(e.CommandSource, Button).NamingContainer, GridEditFormItem).GetDataKeyValue("ID") Dim rcbForms As RadComboBox = TryCast(e.Item.FindControl("rcbForms"), RadComboBox) Dim rf As New MB.RequestForm() rf.Update(RequestFormID, rcbForms.SelectedValue) e.Item.Edit = False TryCast(e.Item.NamingContainer, GridTableView).Rebind() End Select End If End Sub Protected Sub RadGrid1_DeleteCommand(ByVal source As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) Dim editedItem As GridEditableItem = TryCast(e.Item, GridEditableItem) Select Case CType(editedItem.Parent.Parent, GridTableView).Name Case "gtvPackets" Dim ID As Guid = CType(CType(e.CommandSource, ImageButton).NamingContainer, GridDataItem).GetDataKeyValue("ID") MB.RequestFormPacket.Delete(ID) System.Web.UI.ScriptManager.RegisterStartupScript(Me.Page, Me.GetType(), "ClientMessage", "NotifyMessage('Request Form Packet has been deleted.');", True) Case "gtvForms" Dim ID As Guid = CType(CType(e.CommandSource, ImageButton).NamingContainer, GridDataItem).GetDataKeyValue("ID") MB.RequestForm.Delete(ID) System.Web.UI.ScriptManager.RegisterStartupScript(Me.Page, Me.GetType(), "ClientMessage", "NotifyMessage('Request Form has been removed.');", True) End Select End Sub Protected Sub ibnItemUpArrow_Command(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.CommandEventArgs) Dim gtv As GridTableView = CType(CType(sender, ImageButton).NamingContainer.NamingContainer, GridTableView) Dim ID As Guid = New Guid(e.CommandArgument.ToString()) Call MB.RequestForm.MoveUp(ID) gtv.Rebind() End Sub Protected Sub ibnItemDownArrow_Command(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.CommandEventArgs) Dim gtv As GridTableView = CType(CType(sender, ImageButton).NamingContainer.NamingContainer, GridTableView) Dim ID As Guid = New Guid(e.CommandArgument.ToString()) Call MB.RequestForm.MoveDown(ID) gtv.Rebind() End Sub Protected Sub RadGrid1_RowDrop(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridDragDropEventArgs) If String.IsNullOrEmpty(e.HtmlElement) Then If e.DraggedItems(0).OwnerGridID = RadGrid1.ClientID Then If e.DestDataItem IsNot Nothing Then Dim gtv As GridTableView = CType(e.DestDataItem.NamingContainer, GridTableView) For Each gdi As GridDataItem In e.DraggedItems Select Case gtv.Name Case "gtvForms" MB.RequestForm.DragAndDropReorder(gdi.GetDataKeyValue("ID"), e.DestDataItem.GetDataKeyValue("ID"), IIf(e.DropPosition = GridItemDropPosition.Above, True, False)) gtv.Rebind() End Select Next End If End If End If End Sub Protected Sub cbxAllowDragAndDrop_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Dim cbx As CheckBox = CType(sender, CheckBox) If cbx.Checked Then RadGrid1.ClientSettings.AllowRowsDragDrop = True RadGrid1.ClientSettings.Selecting.AllowRowSelect = True RadGrid1.ClientSettings.Selecting.EnableDragToSelectRows = True Else RadGrid1.ClientSettings.AllowRowsDragDrop = False RadGrid1.ClientSettings.Selecting.AllowRowSelect = False RadGrid1.ClientSettings.Selecting.EnableDragToSelectRows = False End If End Sub Protected Sub ibnDisableToggleProcess_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Dim ibn As ImageButton = CType(sender, ImageButton) Dim hdn As HiddenField = CType(ibn.NamingContainer.FindControl("hdnDisableProcessID"), HiddenField) Dim status As Boolean = MB.RequestFormPacket.ActivateToggle(New Guid(hdn.Value)) Dim gtv As GridTableView = CType(ibn.NamingContainer.NamingContainer, GridTableView) gtv.Rebind() System.Web.UI.ScriptManager.RegisterStartupScript(Me.Page, Me.GetType(), "ClientMessage", "SuccessMessage('Process has been " & IIf(status, "Activated", "Deactivated") & ".');", True) End Sub Protected Function DisplayTagList(ByVal tags As IEnumerable(Of MB.RequestFormPacketTag)) As String Dim list As String = "" For Each t As MB.RequestFormPacketTag In tags list += "<span class=""tags"">" & t.Tag.Name & "</span>" Next Return list End Function Protected Sub RadGrid1_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Select Case e.Item.GetType.Name Case "GridEditFormInsertItem" 'do nothing Case "GridEditFormItem" Dim plh As PlaceHolder = CType(e.Item.FindControl("plhTags"), PlaceHolder) Dim hdn As HiddenField = CType(e.Item.FindControl("hdnTags"), HiddenField) If hdn IsNot Nothing Then Dim gefi As GridEditFormItem = e.Item Dim packet As MB.RequestFormPacket = gefi.DataItem For Each pt As MB.RequestFormPacketTag In packet.RequestFormPacketTags Call CreateTagStyle(plh, hdn, pt.Tag.Name) If hdn.Value = "" Then hdn.Value = "|" End If hdn.Value += pt.Tag.Name & "|" Next End If End Select End Sub Protected Sub btnAddTag_Click(ByVal sender As Object, ByVal e As System.EventArgs) Dim btnAddTag As Button = sender Dim rtbTags As RadTextBox = btnAddTag.NamingContainer.FindControl("rtbTags") Dim plhTags As PlaceHolder = btnAddTag.NamingContainer.FindControl("plhTags") Dim hdnTags As HiddenField = btnAddTag.NamingContainer.FindControl("hdnTags") Dim TagExists As Boolean = False rtbTags.Text = rtbTags.Text.ToUpper().Trim() Dim currentTags() As String = Split(hdnTags.Value, "|") For i As Integer = 1 To currentTags.Count - 2 Call CreateTagStyle(plhTags, hdnTags, currentTags(i)) Next If TagExists = False And String.IsNullOrEmpty(rtbTags.Text) = False Then Call CreateTagStyle(plhTags, hdnTags, rtbTags.Text) If String.IsNullOrEmpty(hdnTags.Value) Then hdnTags.Value = "|" End If hdnTags.Value += rtbTags.Text & "|" 'System.Web.UI.ScriptManager.RegisterStartupScript(Me.Page, Me.GetType(), "ClientMessage", "highlightTag('" & lbn.ClientID & "');", True) End If rtbTags.Text = "" rtbTags.Focus() End Sub Public Sub RemoveTag(ByVal sender As Object, ByVal e As EventArgs) Response.End() Dim lbnSender As LinkButton = sender Dim plhTags As PlaceHolder = lbnSender.NamingContainer.FindControl("plhTags") Dim hdnTags As HiddenField = lbnSender.NamingContainer.FindControl("hdnTags") Response.Write(hdnTags.Value) Response.End() Dim TagExists As Boolean = False Dim currentTags() As String = Split(hdnTags.Value, "|") For i As Integer = 1 To currentTags.Count - 2 Call CreateTagStyle(plhTags, hdnTags, currentTags(i)) Next End Sub Protected Sub CreateTagStyle(ByVal plh As PlaceHolder, ByVal hdn As HiddenField, ByVal tagName As String) Dim lbn As New LinkButton() lbn.ID = "lbn_" & hdn.ClientID & "_" & tagName lbn.CssClass = "deleteCreateTag" lbn.Text = "X" AddHandler lbn.Click, AddressOf RemoveTag plh.Controls.Add(New LiteralControl("<div><span class=showTag>" & tagName & "</span>")) plh.Controls.Add(lbn) plh.Controls.Add(New LiteralControl("</div>")) End Sub </script> <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> <style type="text/css"> .tags { border:solid 1px #93AFE5; background-color:#F3F7F8; margin: 0px 2px 0px 2px; padding: 0px 4px 0px 4px; font-family:Verdana; font-size:10px; text-transform:uppercase; } </style> <script type="text/javascript"> function highlightTag(id) { $("#" + id).highlightFade({ color: '#FFFF99', speed: 2000, iterator: 'sinusoidal' }); } </script> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" DefaultLoadingPanelID="RadAjaxLoadingPanel1" EnableAJAX="false"> <AjaxSettings> <telerik:AjaxSetting AjaxControlID="RadGrid1"> <UpdatedControls> <telerik:AjaxUpdatedControl ControlID="RadGrid1" /> </UpdatedControls> </telerik:AjaxSetting> </AjaxSettings> </telerik:RadAjaxManager> <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" /> <telerik:RadTabStrip ID="RadTabStrip1" runat="server" Skin="WebBlue" style="position:relative;top:1px;" ValidationGroup="vgTabs"> <Tabs> <telerik:RadTab Text="Request Form Packets" Selected="true" ImageUrl="~/Admin/Images/Packet2.png" /> <telerik:RadTab Text="Request Forms" NavigateUrl="Forms.aspx" ImageUrl="~/Admin/Images/Forms.png" /> </Tabs> </telerik:RadTabStrip> <asp:ObjectDataSource ID="odsForms" runat="server" TypeName="MB.Form" SelectMethod="GetForms" /> <asp:Panel ID="pnlContent" runat="server" CssClass="ContentPanel"> <telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" AllowSorting="True" GridLines="None" OnNeedDataSource="RadGrid1_NeedDataSource" AllowAutomaticUpdates="true" AllowAutomaticDeletes="true" AllowAutomaticInserts="true" OnInsertCommand="RadGrid1_InsertCommand" OnUpdateCommand="RadGrid1_UpdateCommand" OnDeleteCommand="RadGrid1_DeleteCommand" OnRowDrop="RadGrid1_RowDrop" OnDetailTableDataBind="RadGrid1_DetailTableDataBind" OnItemDataBound="RadGrid1_ItemDataBound"> <%-----------------------------------------------------------%> <%------------------------- PACKETS -------------------------%> <%-----------------------------------------------------------%> <MasterTableView AutoGenerateColumns="False" DataKeyNames="ID" ClientDataKeyNames="ID" ShowHeadersWhenNoRecords="true" Name="gtvPackets" NoMasterRecordsText="There are currently no Request Form Packets" GroupLoadMode="Client" RetrieveNullAsDBNull="true" CommandItemDisplay="Top" AllowAutomaticUpdates="true" AllowAutomaticDeletes="true" AllowAutomaticInserts="true"> <RowIndicatorColumn> <HeaderStyle Width="20px"></HeaderStyle> </RowIndicatorColumn> <ExpandCollapseColumn> <HeaderStyle Width="20px"></HeaderStyle> </ExpandCollapseColumn> <CommandItemTemplate> <table width="100%"> <tr> <td class="AdminGridHeader">&nbsp;<img src="../Admin/Images/Packet2.png" align="absmiddle" width="16" height="16" />&nbsp;&nbsp;Request Form Packets</td> <td width="1%"><asp:CheckBox ID="cbxAllowDragAndDrop" runat="server" AutoPostBack="true" OnCheckedChanged="cbxAllowDragAndDrop_CheckedChanged" /></td> <td width="1%" nowrap="nowrap"><asp:Label AssociatedControlID="cbxAllowDragAndDrop" ID="Label1" runat="server" Text="Enable Drag and Drop Reordering" ToolTip="Drag and Drop Reordering applies only to Forms." /></td> <td align="right" width="1%"><asp:Button ID="btnAddPacket" Text="Create New Packet" runat="server" CommandName="InitInsert" /></td> </tr> </table> </CommandItemTemplate> <EditFormSettings> <EditColumn ButtonType="PushButton" HeaderStyle-Font-Bold="true" UniqueName="EditCommandColumn" /> </EditFormSettings> <EditItemStyle Font-Bold="true" BackColor="#FFFFCC" /> <Columns> <telerik:GridTemplateColumn HeaderText="Packet Name" UniqueName="PacketName" SortExpression="Name"> <ItemTemplate> <img src="../Admin/Images/Packet2.png" align="absmiddle" width="16" height="16" />&nbsp;&nbsp;<%#Eval("Name")%> </ItemTemplate> <EditItemTemplate> <telerik:RadTextBox runat="server" ID="rtbName" Width="300" Text='<%# Bind("Name") %>' /> <asp:RequiredFieldValidator ID="rfvName" runat="server" ErrorMessage="Required" ControlToValidate="rtbName" /> </EditItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn HeaderText="Tags" UniqueName="Tags"> <ItemTemplate> <%#DisplayTagList(Eval("RequestFormPacketTags"))%> </ItemTemplate> <EditItemTemplate> <asp:Panel ID="pnlAddTags" runat="server" DefaultButton="btnAddTag"> <table cellpadding="0" cellspacing="0"> <tr> <td> <telerik:RadTextBox ID="rtbTags" runat="server" Width="200" style="text-transform:uppercase;" /> <asp:RegularExpressionValidator ID="revTags" runat="server" ErrorMessage="Invalid Entry" ControlToValidate="rtbTags" Display="Dynamic" ValidationExpression="^[^<>`~!/@\#}$%:;)(_^{&*=|+]+$" ValidationGroup="vgTags" /> </td> <td> <asp:Button ID="btnAddTag" runat="server" ValidationGroup="vgTags" Text="Add" OnClick="btnAddTag_Click" /> </td> </tr> </table> </asp:Panel> <div id="divTags"> <asp:PlaceHolder id="plhTags" runat="server" /> <asp:HiddenField ID="hdnTags" runat="server" /> </div> </EditItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn HeaderTooltip="Disable" ItemStyle-Width="1%" ItemStyle-HorizontalAlign="Center" SortExpression="IsActive" UniqueName="IsActive" ReadOnly="true"> <ItemTemplate> <asp:ImageButton ID="ibnDisabledProcess" runat="server" ImageUrl="../Images/Icons/Stop.png" Width="16" OnClientClick="return window.confirm('Activate this Process?');" ToolTip="Click to activate this Request for Account use." Visible='<%#IIF(Eval("IsActive"),false,true) %>' OnClick="ibnDisableToggleProcess_Click" /> <asp:ImageButton ID="ibnEnabledProcess" runat="server" ImageUrl="../Images/Icons/Stop_disabled.png" Width="16" OnClientClick="return window.confirm('Deactivate this Process?');" ToolTip="Click to deactivate this Request for Account use." Visible='<%#IIF(Eval("IsActive"),true,false) %>' OnClick="ibnDisableToggleProcess_Click" /> <asp:HiddenField ID="hdnDisableProcessID" runat="server" Value='<%#Eval("ID") %>' /> </ItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn HeaderText="Is Active" UniqueName="IsActiveCheckbox" Display="false"> <EditItemTemplate> <asp:CheckBox ID="cbxIsActive" runat="server" Checked='<%# IIF(Eval("IsActive") Is DbNull.Value OrElse Eval("IsActive") = False,False,True) %>' /> </EditItemTemplate> </telerik:GridTemplateColumn> <telerik:GridEditCommandColumn ButtonType="ImageButton" EditText="Edit Admin" ItemStyle-Width="16" EditImageUrl="~/Images/edit-small.png" /> <telerik:GridButtonColumn ConfirmText="Do you really want to delete this Admin? WARNING: THIS CANNOT BE UNDONE!!" ConfirmDialogType="RadWindow" ConfirmTitle="Delete" ButtonType="ImageButton" CommandName="Delete" Text="Delete Admin" ImageUrl="~/Images/Delete.png" UniqueName="DeleteColumn"> <ItemStyle HorizontalAlign="Center" Width="16" /> </telerik:GridButtonColumn> </Columns> <DetailTables> <%-----------------------------------------------------------%> <%-------------------------- FORMS --------------------------%> <%-----------------------------------------------------------%> <telerik:GridTableView Name="gtvForms" AllowPaging="true" PagerStyle-Position="TopAndBottom" PageSize="20" AutoGenerateColumns="false" DataKeyNames="RequestFormPacketID,ID" runat="server" CommandItemDisplay="Top" Width="100%"> <ParentTableRelation> <telerik:GridRelationFields DetailKeyField="RequestFormPacketID" MasterKeyField="ID" /> </ParentTableRelation> <CommandItemTemplate> <table width="100%" class="AdminGridHeaders"> <tr> <td class="AdminGridHeaders"> &nbsp;<img src="../Admin/Images/Forms.png" align="absmiddle" width="16" height="16" />&nbsp;&nbsp;Forms </td> <td align="right"> <asp:Button ID="ibnAdd" runat="server" Text="Add Form" CommandName="InitInsert" /> </td> </tr> </table> </CommandItemTemplate> <EditFormSettings> <EditColumn ButtonType="PushButton" InsertText="Save" UpdateText="Update" CancelText="Cancel" /> </EditFormSettings> <EditItemStyle Font-Bold="true" BackColor="#FFFFCC" /> <Columns> <telerik:GridTemplateColumn HeaderText="Form Name" UniqueName="FormName"> <ItemTemplate> <img src="../Admin/Images/Forms.png" align="absmiddle" width="16" height="16" style="margin-right:4px;" /> <%#Eval("Form.Name")%> </ItemTemplate> <EditItemTemplate> <telerik:RadComboBox ID="rcbForms" runat="server" DataSourceID="odsForms" AppendDataBoundItems="true" DataTextField="Name" DataValueField="ID" SelectedValue='<%#Bind("FormID")%>'> <Items> <telerik:RadComboBoxItem Text="-- Select a Form --" Value="" /> </Items> </telerik:RadComboBox> <asp:RequiredFieldValidator ID="rfvForms" runat="server" ErrorMessage="Required" ControlToValidate="rcbForms" InitialValue="-- Select a Form --" Display="Dynamic" /> </EditItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn HeaderText="Test" ReadOnly="true" UniqueName="TestForm" HeaderStyle-Width="1%" ItemStyle-HorizontalAlign="Center"> <ItemTemplate> <asp:HyperLink ID="hypTestForm" runat="server" NavigateUrl='<%# "FormsPreview.aspx?fid=" & Eval("FormID").ToString() & "&test=true" %>' Target="_blank"><asp:Image ID="imgTestProcess" runat="server" ImageUrl="~/Admin/Images/Test.png" ImageAlign="AbsMiddle" ToolTip="Test Form" /></asp:HyperLink> </ItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn HeaderText="Header" SortExpression="Header" UniqueName="Header"> <ItemTemplate> <%#Eval("Form.Header")%>&nbsp; </ItemTemplate> </telerik:GridTemplateColumn> <telerik:GridTemplateColumn ReadOnly="true" ItemStyle-HorizontalAlign="Center" HeaderStyle-Width="1%" HeaderStyle-Wrap="false" ItemStyle-Wrap="false" UniqueName="SortOrder"> <ItemTemplate> <asp:ImageButton ID="ibnItemUpArrow" runat="server" Width="16" height="16" ImageUrl="~/Admin/Images/ArrowUp.png" ImageAlign="AbsMiddle" Visible='<%#IIF(Eval("SortOrder") = 0,false,true) %>' CommandArgument='<%#Eval("ID") %>' OnCommand=

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• NHibernate.MappingException: No persister for:

  - by Sara Chipps

  Now, before you say it I DID google and my hbm.xml file IS an Embedded Resource. Here is the code I am calling: ISession session = GetCurrentSession(); var returnObject = session.Get<T>(Id); Here is my mapping file for the class: <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"> <class name="HQData.Objects.SubCategory, HQData" table="SubCategory" lazy="true"> <id name="ID" column="ID" unsaved-value="0"> <generator class="identity" /> </id> <property name="Name" column="Name" /> <property name="NumberOfBuckets" column="NumberOfBuckets" /> <property name="SearchCriteriaOne" column="SearchCriteriaOne" /> <bag name="_Businesses" cascade="all"> <key column="SubCategoryId"/> <one-to-many class="HQData.Objects.Business, HQData"/> </bag> <bag name="_Buckets" cascade="all"> <key column="SubCategoryId"/> <one-to-many class="HQData.Objects.Bucket, HQData"/> </bag> </class> </hibernate-mapping> Has anyone run to this issue before? I swore that was it after I read it, but no dice. Here is the rest of the error and thanks for your help. MappingException: No persister for: HQData.Objects.SubCategory]NHibernate.Impl.SessionFactoryImpl.GetEntityPersister(String entityName, Boolean throwIfNotFound) in c:\CSharp\NH2.0.0\nhibernate\src\NHibernate\Impl\SessionFactoryImpl.cs:766 NHibernate.Impl.SessionFactoryImpl.GetEntityPersister(String entityName) in c:\CSharp\NH2.0.0\nhibernate\src\NHibernate\Impl\SessionFactoryImpl.cs:752 NHibernate.Event.Default.DefaultLoadEventListener.OnLoad(LoadEvent event, LoadType loadType) in c:\CSharp\NH2.0.0\nhibernate\src\NHibernate\Event\Default\DefaultLoadEventListener.cs:37 NHibernate.Impl.SessionImpl.FireLoad(LoadEvent event, LoadType loadType) in c:\CSharp\NH2.0.0\nhibernate\src\NHibernate\Impl\SessionImpl.cs:2054 NHibernate.Impl.SessionImpl.Get(String entityName, Object id) in c:\CSharp\NH2.0.0\nhibernate\src\NHibernate\Impl\SessionImpl.cs:1029 NHibernate.Impl.SessionImpl.Get(Type entityClass, Object id) in c:\CSharp\NH2.0.0\nhibernate\src\NHibernate\Impl\SessionImpl.cs:1020 NHibernate.Impl.SessionImpl.Get(Object id) in c:\CSharp\NH2.0.0\nhibernate\src\NHibernate\Impl\SessionImpl.cs:985 HQData.DataAccessUtils.NHibernateObjectHelper.LoadDataObject(Int32 Id) in C:\Development\HQChannelRepo\HQ Channel Application\HQChannel\HQData\DataAccessUtils\NHibernateObjectHelper.cs:42 HQWebsite.LocalSearch.get_subCategory() in C:\Development\HQChannelRepo\HQ Channel Application\HQChannel\HQWebsite\LocalSearch.aspx.cs:17 HQWebsite.LocalSearch.Page_Load(Object sender, EventArgs e) in C:\Development\HQChannelRepo\HQ Channel Application\HQChannel\HQWebsite\LocalSearch.aspx.cs:27 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +33 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +47 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1436 I had changed some code and I wasn't adding the Assembly to the config file during runtime. Thanks for your help This has been fixed, I am not F-ing with my NHibernate setup ever again!

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• WIX installer with Custom Actions: "built by a runtime newer than the currently loaded runtime and cannot be loaded."

  - by Rimer

  I have a WIX installer that executes Custom Actions over the course of install. When I run the WIX installer, and it encounters its first Custom Action, the installer fails out, and I receive an error in the MSI log as follows: Action start 12:03:53: LoadBCAConfigDefaults. SFXCA: Extracting custom action to temporary directory: C:\DOCUME~1\ELOY06~1\LOCALS~1\Temp\MSI10C.tmp-\ SFXCA: Binding to CLR version v2.0.50727 Calling custom action WIXCustomActions!WIXCustomActions.CustomActions.LoadBCAConfigDefaults Error: could not load custom action class WIXCustomActions.CustomActions from assembly: WIXCustomActions System.BadImageFormatException: Could not load file or assembly 'WIXCustomActions' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. File name: 'WIXCustomActions' at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.AppDomain.Load(String assemblyString) at Microsoft.Deployment.WindowsInstaller.CustomActionProxy.GetCustomActionMethod(Session session, String assemblyName, String className, String methodName) ... the specific problem from above is "System.BadImageFormatException: Could not load file or assembly 'WIXCustomActions' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded." The wordage of that error seems to indicate something like an incorrectly referenced .NET framework or something (I'm targeting 3.5 in both my custom actions and its dependencies), but I can't figure out where to make a change to address this problem. Any ideas? .... Not sure if this will help but it's the CustomActions package batch file I run to create the .dll package containing the custom action functions: =============== call "C:\Program Files\Microsoft Visual Studio 10.0\VC\vcvarsall.bat" @echo on cd "C:\development\trunk\PortalsDev\csharp\production\Installers\WIX\customactions\PAServicesWIXCustomActions" csc /target:library /r:"C:\program files\windows installer xml v3.6\sdk\microsoft.deployment.windowsinstaller.dll" /r:"C:\development\trunk\PortalsDev\csharp\production\Installers\WIX\customactions\PAServicesWIXCustomActions\bin\Debug\eLoyalty.PortalLib.dll" /out:"C:\development\trunk\PortalsDev\csharp\production\Installers\WIX\customactions\PAServicesWIXCustomActions\bin\Debug\WIXCustomActions.dll" CustomActions.cs cd "C:\Program Files\Windows Installer XML v3.6\SDK" makesfxca "C:\development\trunk\PortalsDev\csharp\production\Installers\WIX\customactions\PAServicesWIXCustomActions\bin\Debug\BatchCustomerAnalysisWIXCustomActionsPackage.dll" "c:\program files\windows installer xml v3.6\sdk\x86\sfxca.dll" "C:\development\trunk\PortalsDev\csharp\production\Installers\WIX\customactions\PAServicesWIXCustomActions\bin\Debug\WIXCustomActions.dll" customaction.config Microsoft.Deployment.WindowsInstaller.dll

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• .Net Intermittent System.Web.Services.Protocols.SoapHeaderException

  - by ScottE

  We have a .net 3.5 web app that consumes third party web services. The proxy was created by adding a web reference to their wsdl. This proxy is not compiled. Our error logging is picking up frequent but intermittent exceptions: An exception of type 'System.Web.Services.Protocols.SoapHeaderException' occurred and was caught If I follow the url to the page that generated the exception, I can't recreate it. Edit: Here is most of the exception - where it bubbled up from Message : Internal Error Type : System.Web.Services.Protocols.SoapHeaderException, System.Web.Services, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a Source : System.Web.Services Help link : Actor : Code : http://schemas.xmlsoap.org/soap/envelope/:Client Detail : Lang : Node : Role : SubCode : Data : System.Collections.ListDictionaryInternal TargetSite : System.Object[] ReadResponse(System.Web.Services.Protocols.SoapClientMessage, System.Net.WebResponse, System.IO.Stream, Boolean) Stack Trace : at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at Vendor.getSearch(getSearchRequest getSearchRequest) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\be43c34e\b09edc7e\App_WebReferences.pww-cf-q.0.cs:line 73 Edit 2: Inner exceptions: I sometimes get the following inner exceptions logged: Message : Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. Type : System.IO.IOException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Source : System Help link : Data : System.Collections.ListDictionaryInternal TargetSite : Int32 Read(Byte[], Int32, Int32) Stack Trace : at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Net.TlsStream.CallProcessAuthentication(Object state) at System.Threading.ExecutionContext.runTryCode(Object userData) at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.ConnectStream.WriteHeaders(Boolean async) And/Or: Message : An existing connection was forcibly closed by the remote host Type : System.Net.Sockets.SocketException, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Source : System Help link : ErrorCode : 10054 SocketErrorCode : ConnectionReset NativeErrorCode : 10054 Data : System.Collections.ListDictionaryInternal TargetSite : Int32 Receive(Byte[], Int32, Int32, System.Net.Sockets.SocketFlags) Stack Trace : at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) Update We're still working on it. Originally there was a route issue, which was resolved. We're still getting the inner exception with socket errors. We had MS support involved today, and they looked at some traces and network captures. The web service host does round-robin DNS, and they may be responding on a different IP address for the syn syn/ack from one ip, and the next from a different ip. This is not good. This is likely quite specific to our situation, but perhaps it applies to others as well. Microsoft Network Monitor and an application trace got us the information we needed.

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