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• Use currently logged-in user in query

  - by Degan

  I am using VisualWebDeveloperExpress2008 with Access as the membership provider. I have some cases where I want users to edit their own data. This would involve a query where the UserId should equal the UserID of the user who is using the site. I am expecting to use WHERE UserId = ?, but I have not found out where to direct "?". The IDE gives several choices, but I am uncertain which to choose. This, while it looks promising does not work: <SelectParameters> <asp:ProfileParameter Name="UserID" PropertyName="UserId" Type="Int32" /> </SelectParameters> What is best to use for the Select Parameter?

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• Struts 2: redirect-action ? From on page to another and back again.

  - by Stephan

  Hello, i have a jsp page that has a submit button. This button is linked with another jsp page. So lets assume my stuts file looks like this: B.jsp So now the submit button being on page "A.jsp" will take me to B.jsp. This works. The problem is that i want to do the following: press on the submit button on page A.jsp , go to B.jsp where i will press again a button and go back to A.jsp . The problem is that to page B.jsp go many pages, so B.jsp has to know when pressing the submit button to which page will take me back , in this case A.jsp again. So in a few words, B.jsp has to know from which page i came from so that i can go back again by pressing a submit button (this could be a parameter that would be sent back to A.jsp again, but does not really matter at the current point) A.jsp - B.jsp - A.jsp C.jsp - B.jsp - C.jsp

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• Constructors + Dependency Injection

  - by Sunny

  If I am writing up a class with more than 1 constructor parameter like: class A{ public A(Dependency1 d1, Dependency2 d2, ...){} } I usually create a "argument holder"-type of class like: class AArgs{ public Dependency1 d1 { get; private set; } public Dependency2 d2 { get; private set; } ... } and then: class A{ public A(AArgs args){} } Typically, using a DI-container I can configure the constructor for dependencies & resolve them & so there is minimum impact when the constructors need to change. Is this considered an anti-pattern and/or any arguments against doing this?

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• Serialze an Object to a String

  - by Vaccano

  I have the following method to save an Object to a file: // Save an object out to the disk public static void SerializeObject<T>(this T toSerialize, String filename) { XmlSerializer xmlSerializer = new XmlSerializer(toSerialize.GetType()); TextWriter textWriter = new StreamWriter(filename); xmlSerializer.Serialize(textWriter, toSerialize); textWriter.Close(); } I confess I did not write it (I only converted it to a extension method that took a type parameter). Now I need it to give the xml back to me as a string (rather than save it to a file). I am looking into it, but I have not figured it out yet. I thought this might be really easy for someone familiar with these objects. If not I will figure it out eventually.

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• How to pass a variable through url and use it inside a controller

  - by anthonypliu

  I have this controller: public ActionResult Details(String UserName) { using (var db = new MatchGamingEntities()) { var Users = from m in db.Users join m2 in db.MyProfiles on m.UserId equals m2.UserId where m.UserName == UserName select new UserViewModel { UserName = m.UserName, LastActivityDate = m.LastActivityDate, Address = m2.Address, City = m2.City, State = m2.State, Zip = m2.Zip }; return View(Users.SingleOrDefault()); } } I type in the url Profiles/Details/hello, but it does not work, if I do Profiles/Details?UserName=hello then it works. I have another ActionResult just like this except taking in an int id as parameter and it works fine with the first url format.

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• how to listen to Enter button when using JOptionPane.showOptionDialog

  - by MemoryLeak

  I use: char[] password = null; JPasswordField jpf = new JPasswordField(30); java.lang.Object [] messageInput = { prompt, jpf }; java.lang.Object [] options = { jpf , "OK", "Cancel"}; int result = JOptionPane.showOptionDialog(null, messageInput, title, JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, ""); JOptionPane.showMessageDialog(null, result); if (result == 1) { password = jpf.getPassword(); } else if(result == JOptionPane.CANCEL_OPTION) { } return password; to get password, but this can not listen to the Enter button. I know if I set the options parameter to null, can make the dialog listen to "enter" button, but if I do that, the dialog don't focus to the textbox when show up. Can someone help me on this ? Thanks in advance !

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• Inferring type from method generics

  - by ng

  I am from a Java background and I am looking from the equivalent in c# for the following. public interface Reader { <T> T read(Class<? extends T> type); } Such that I can do the following, constraining the parameter and inferring the return type. Cat cat = reader.read(Cat.class); Dog dog = reader.read(Dog.class); I was hoping something like this would work in c# but I am not sure it will. public interface Reader { T Read<T>(); } And and do this. public class TypeReader : Reader { public T Read<T>() { Type type = T.GetType(); ... } } Is something like this even possible in c#?

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• How to pass a const unsigned char * from c++ to c#

  - by tzup

  So I have a function in unmanaged c++ that gets called when some text happens to have "arrived": #using <MyParser.dll> ... void dump_body(const unsigned char *Body, int BodyLen) { // Need to pass the body to DumpBody, but as what type? ... lMyParser::Parser::DumpBody(???); } DumpBody is a function defined in a C# DLL that should take one parameter of type? Body holds an array of characters (text) of length BodyLen. There's obviously some marshalling to be done here but I have no idea how. Please help.

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• How to update (append to) an href in jquery?

  - by John Isaacks

  I have a list of links that all go to a google maps api. the links already have the daddr (destination) parameter in them as static. I am using Geo-Location to find the users position and I want to add the saddr (source address) to the links once I get the data. so basically I will need to add something like &saddr=50.1234567,-50.03452 at the tail end of all the links pointing to google maps All the links have a class called directions-link and from this page I have figured out how to change them: $("a.directions-link").attr("href", "http://www.google.com/"); However I only want to append my value to the end of the href without changing what the href already is. How can I do that? Thanks!!

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• receive a responseText in ajax but without div tag

  - by kawtousse

  Hi everyone I want to know if there is any other way whithout using a div tag to receive response html when sending parameter whith ajax. I'am asking because when iam building the select in other servlet and returning the result to jsp it receive the responsehtml in a div tag when we use the famous: x = xhr.responseText; document.getElementById('param').innerHTML = x; with param is the id of div tag. Note: this works fine when populating ddl but its constraint are multiple for my case. Thinks.

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• Beginner C++ Question

  - by Donal Rafferty

  I have followed the code example here toupper c++ example And implemented it in my own code as follows void CharString::MakeUpper() { char* str[strlen(m_pString)]; int i=0; str[strlen(m_pString)]=m_pString; char* c; while (str[i]) { c=str[i]; putchar (toupper(c)); i++; } } But this gives me the following compiler error CharString.cpp: In member function 'void CharString::MakeUpper()': CharString.cpp:276: error: invalid conversion from 'char*' to 'int' CharString.cpp:276: error: initializing argument 1of 'int toupper(int)' CharString.cpp: In member function 'void CharString::MakeLower()': This is line 276 putchar (toupper(c)); I understand that toupper is looking for int as a parameter and returns an int also, is that the problem? If so how does the example work?

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• Drop down list population fails after validation fails

  - by sarah

  Hi All, I am polpulating data in drop down reading from request scope,i am doing validaiton of fe w field after submission i wont get data in drop down i am using struts and the corresponding form bean defn is like <action path="/userProcess" name="userForm" type="com.actions.UserManagementAction" parameter="method" input="/views/AddUsers.jsp" scope="request" > <forward name="success" path="/views/User_Management.jsp" /> </action> and the drop down listing is <select name="roleName"> <c:forEach items="${roleNames}" var="role"> <option value="${role}">${role}</option> </c:forEach> </select> how should i handle this ?

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• How do I make a multiple file upload?

  - by Bluemagica

  I am trying to make a multiple image uploader. The file upload fields are being added in the form dynamically using jquery. I tried making an array of the fields since I don't want to have a hidden field. so my generated upload fields look like <input type="file" id="img0" name="img[]"/> <input type="file" id="img1" name="img[]"/> <input type="file" id="img2" name="img[]"/> ..... .. And on the php side I did something like if(isset($_FILES['img'])) { foreach($_FILES['img'] as $k=>$v) { if($v!="") { uploadImage($k,0,0,0,"content/gallery/"); } } } Now I know I am way too wrong, since in that code I am looping through the 'img' file's properties instead of all images....but I have no idea how to fix this. PS: uploadImage is a function I wrote which expects the file input field's name as the first parameter.

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• Can I use a single instance of a delegate to start multiple Asynchronous Requests?

  - by RobV

  Just wondered if someone could clarify the use of BeginInvoke on an instance of some delegate when you want to make multiple asynchronous calls since the MSDN documentation doesn't really cover/mention this at all. What I want to do is something like the following: MyDelegate d = new MyDelegate(this.TargetMethod); List<IAsyncResult> results = new List<IAsyncResult>(); //Start multiple asynchronous calls for (int i = 0; i < 4; i++) { results.Add(d.BeginInvoke(someParams, null, null)); } //Wait for all my calls to finish WaitHandle.WaitAll(results.Select(r => r.AsyncWaitHandle).ToArray()); //Process the Results The question is can I do this with one instance of the delegate or do I need an instance of the delegate for each individual call? Given that EndInvoke() takes an IAsyncResult as a parameter I would assume that the former is correct but I can't see anything in the documentation to indicate either way.

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• Open URL with Safari no matter what system browser is set to

  - by Mark

  In my objective-c program, I need to open a URL in Safari no matter what the system's default browser is. That means that this won't work, because it could launch Firefox or whatever other browser: NSWorkspace * ws = [NSWorkspace sharedWorkspace]; [ws openURL: url]; I think I'm close with this: [ws launchAppWithBundleIdentifier: @"com.apple.Safari" options: NSWorkspaceLaunchWithoutActivation additionalEventParamDescriptor: NULL launchIdentifier: nil]; only need to figure out how to pass in the URL as parameter... Is there an easier way? Thanks!

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• Problem with passing folder path string to web service function via jQuery.ajax

  - by the_V

  Hello, I need to perform asp.net web-service function call via jQuery and pass asp.net application path to it. That's the way I'm trying to do it (code is located within asp.net page, e.g. aspx file): var d = "{'str':'<%=System.DateTime.Now.ToString() %>', 'applicationPath':'<%=GetApplicationPath() %>'}"; $.ajax({ type: "POST", url: "http://localhost/testwebsite/TestWebService.asmx/Test", data: d, contentType: "application/json; charset=utf-8", dataType: "json", error: function (xhr, status, error) { var err = eval("(" + xhr.responseText + ")"); alert(err.Message); }, success: function (msg) { } }); That's what GetApplicationPath method looks like: protected string GetApplicationPath() { return HttpUtility.HtmlEncode(Request.PhysicalApplicationPath); } And here is a header of web-service function which I'm trying to call: public void Test(string str, string applicationPath) Function call works well, but applicationPath parameter doesn't passed correctly. When I debug it I see that backslashes are removed, function gets "C:ProjectsSamplesmytestwebsite" instead of "'C:\Projects\Samples\mytestwebsite\'". How can I overcome this?

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• Is there a way in C# 4.0 to have a method take a delegate with the parameters baked in?

  - by Rob Packwood

  I have this code for reporting on a simple demo app I am writing: private static void ReportOnTimedProcess(Action process) { var stopwatch = new Stopwatch(); stopwatch.Start(); process(); stopwatch.Stop(); Console.WriteLine("Process took {0} seconds", stopwatch.ElapsedMilliseconds*1000); } I basically want to track the time of any process. I am trying to have this method take a delegate as a parameter that can have any number of varying parameters. Is there some way an Expression can do this?

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• LINQ Expression help with Func TEntity,TType

  - by Chris Conway

  I have a repository method that accepts an order by parameter in the form: public IEnumerable<TEntity> Get<TEntity>(Expression<Func<TEntity,string>> orderBy) Now that works fine when trying to sort by a property of type string, var entities = rep.Get(x => x.Name); but what if i want to sort by double or int or any other type. Doing something like var entities = rep.Get(x => x.Price); obviously throws a compile error saying I can't convert double to string. How can I make this more generic so I can sort by any property in my entity, or at least the properties where the type implements IComparable or something similar?

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• Elegant way to distinct Path or Entry key

  - by sum1stolemyname

  I have an application loading CAD data (Custom format), either from the local filesystem specifing an absolute path to a drawing or from a database. Database access is realized through a library function taking the drawings identifier as a parameter. the identifiers have a format like ABC 01234T56-T, while my paths a typical windows Paths (eg x:\Data\cadfiles\cadfile001.bin). I would like to write a wrapper function Taking a String as an argument which can be either a path or an identifier which calls the appropriate functions to load my data. Like this: Function CadLoader(nameOrPath : String):TCadData; My Question: How can I elegantly decide wether my string is an idnetifier or a Path to a file? Use A regexp? Or just search for '\' and ':', which are not appearing in the Identifiers?

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• An invalid character was found in text content.'

  - by Praveen Nambiar

  An invalid character was found in text content.'. Could not find prepared statement with handle 0. sp_xml_removedocument: The value supplied for parameter number 1 is invalid. Below is the xml that i am generating. <NewDataSet> <ControlManagementItems><ControlId>74</ControlId><Value>wqeqe</Value></ControlManagementItems> <ControlManagementItems><ControlId>76</ControlId><Value>Yes</Value></ControlManagementItems> <ControlManagementItems><ControlId>78</ControlId><Value>Consumer Core $100 infinite – Nov 2010</Value></ControlManagementItems> <ControlManagementItems><ControlId>108</ControlId><Value>Samsung Galaxy S 16GB</Value></ControlManagementItems> </NewDataSet>

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• How to use php variables (arrays) in mysql select statements?

  - by davidconn

  Hi everybody, How do you use a php variable (array) inside a mysql select statement? I am designing an auction site and currently working on a page that lets people view a list of all the current bids for an item. I want to display 3 columns: amountbid - the amount each bidder has bid for the item (held in tblbid) bidderid - the id of each bidder who has bid (found in tbluser) total_positivity_feedback - how many users have left positive feedback for the bidder (calculated from tblfeedback) To find the 'amount' and the 'bidderid' columns i pass the essayid URL parameter from the previous page. This works fine. Despite this, i can't display the total_positivity_feedback column for the various users who have made each bid. My mysql query looks like this: select tblbid.bidderid, tblbid.amount, (select count(tblfeedback.feedbackid) from tblfeedback WHERE tblfeedback.writerid = "ARRAY VARIABLE GOES HERE") AS total_positivity_feedback FROM tblbid WHERE tblbid.essayid = $essayid_bids I assume that the only way to accomplish this is to make the variable contain the bidderid's of those people who bid for that particular essay? I can't seem to work out how to do this tho?!? Many thanks for your help

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• Why can't I enforce derived classes to have parameterless constructors?

  - by FrisbeeBen

  I am trying to do the following: public class foo<T> where T : bar, new() { public foo() { _t = new T(); } private T _t; } public abstract class bar { public abstract void someMethod(); // Some implementation } public class baz : bar { public overide someMethod(){//Implementation} } And I am attempting to use it as follows: foo<baz> fooObject = new foo<baz>(); And I get an error explaining that 'T' must be a non-abstract type with a public parameterless constructor in order to use it as parameter 'T' in the generic type or method. I fully understand why this must be, and also understand that I could pass a pre-initialized object of type 'T' in as a constructor argument to avoid having to 'new' it, but is there any way around this? any way to enforce classes that derive from 'bar' to supply parameterless constructors?

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• Why is this consider bad practice? or is it? (ASP.Net)

  - by user318573

  Would this code be considered bad practice: <div id="sidebar"> <% =DisplayMeetings(12) %> </div> This is a snippet of code from the default.aspx of a small web app I have worked on. It works perfectly well, runs very fast, but as always, I am aware of the fact that just because it works, doesn't mean it is OK. Basically, the DisplayMeetings subroutine outputs a bunch of formatted HTML (an unordered list actually), with no formatting, just the requisite html, and then my CSS performs all the necessary formatting. The data for generating the list comes from an SQL server database (the parameter controls how many rows to return) and I am using stored procedures and datareader for fast access. This keeps my front-end extraordinary simple and clean, imho, and lets me do all the work in VB or C# in a separate module. I could of course use a databound repeater (and probably 6 or more other methods) of accomplishing the same thing, but are they any better? Other than loosing the design-time features of VS2010?

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• SEND VALUE TO SERVLET WITH THE JAVASCRIPT

  - by kawtousse

  hi everyone, In my JavaScript function I do like this in order to redirect parameters to servlet: var ids1=document.getElementById("projet").value; document.location.href("http://localhost:8080/Opc_Web_App/ServletAffectation?ids1="+ids1); and in the servlet I do the following to get Value: String idprojet= request.getParameter("ids1"); System.out.println("le projet selectionné est :" +idprojet); the problem that i didn't have the result of System.out.print in my screen; so in other terms the servlet didn't get the parameter. I can not see the problem until now. Please help. Thank you.

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• Apache mod_rewrite replace characters in REQUEST_URI

  - by frio80

  I'm trying to write some .htaccess rules that replace certain characters in the REQUEST_URI parameter. Specifically, I want to replace the following: "<" = &lt; "" = &gt; "'" = &apos; '"' = &#x22; ")" = &#x29; "(" = &#x28; Example URL could be http://www.example.com/?<script>alert(1)</script>&q=")("<script') I've tried a whole bunch of methods with no success. Can someone point me in the right direction? Thanks.

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