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Why use a READ UNCOMMITTED isolation level?

- by Kip Birgen

In plan English what are the disadvanges and advantages of using SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED in query for .NET applications and reporting services application?

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Dynamic Jasper Report

- by pramod

Hi, i need to create dynamic jasper report . my scenario is i have nearly 60 tables in database,so i can't create 60 jasper reports.i want a template jasper report which should be modified automatically by program.The data will come dynamically from the database and will be stored in an arraylist. iterating the arraylist i need to upload the data to jasper report. is that possible in java + jasper Reports. if so please give an example or any idea. thanks pramod

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SSRS Broken Embedded Image

- by CodeGrue

I have a SQL Server Reporting Services report with an embedded image in the header. It works fine in preview mode and if I inspect the RDL file, it has the encoded image stream in there. However, when I deploy the report to the server and view the report in the Report Manager, the image shows with a broken X icon. Has anyone experienced this?

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PHP Doctrine frustration: loading models doesn't work..?

- by ropstah

I'm almost losing it, i really hope someone can help me out! I'm using Doctrine with CodeIgniter. Everything is setup correctly and works until I generate the classes and view the website. Fatal error: Class 'BaseObjecten' not found in /var/www/vhosts/domain.com/application/models/Objecten.php on line 13 I'm using the following bootstrapper (as CodeIgniter plugin): <?php // system/application/plugins/doctrine_pi.php // load Doctrine library require_once BASEPATH . '/plugins/Doctrine/lib/Doctrine.php'; // load database configuration from CodeIgniter require_once APPPATH.'/config/database.php'; // this will allow Doctrine to load Model classes automatically spl_autoload_register(array('Doctrine', 'autoload')); // we load our database connections into Doctrine_Manager // this loop allows us to use multiple connections later on foreach ($db as $connection_name => $db_values) { // first we must convert to dsn format $dsn = $db[$connection_name]['dbdriver'] . '://' . $db[$connection_name]['username'] . ':' . $db[$connection_name]['password']. '@' . $db[$connection_name]['hostname'] . '/' . $db[$connection_name]['database']; Doctrine_Manager::connection($dsn,$connection_name); } // CodeIgniter's Model class needs to be loaded require_once BASEPATH.'/libraries/Model.php'; // telling Doctrine where our models are located Doctrine::loadModels(APPPATH.'/models'); // (OPTIONAL) CONFIGURATION BELOW // this will allow us to use "mutators" Doctrine_Manager::getInstance()->setAttribute( Doctrine::ATTR_AUTO_ACCESSOR_OVERRIDE, true); // this sets all table columns to notnull and unsigned (for ints) by default Doctrine_Manager::getInstance()->setAttribute( Doctrine::ATTR_DEFAULT_COLUMN_OPTIONS, array('notnull' => true, 'unsigned' => true)); // set the default primary key to be named 'id', integer, 4 bytes Doctrine_Manager::getInstance()->setAttribute( Doctrine::ATTR_DEFAULT_IDENTIFIER_OPTIONS, array('name' => 'id', 'type' => 'integer', 'length' => 4)); ?> Anyone? p.s. I also tried adding the following right after // (OPTIONAL CONFIGURATION) Doctrine_Manager::getInstance()->setAttribute(Doctrine::ATTR_MODEL_LOADING, Doctrine::MODEL_LOADING_CONSERVATIVE); spl_autoload_register(array('Doctrine', 'modelsAutoload'));

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Winforms connection strings from App.config

- by Geo Ego

I have a Winforms app that I am developing in C# that will serve as a frontend for a SQL Server 2005 database. I rolled the executable out to a test machine and ran it. It worked perfectly fine on the test machine up until the last round of changes that I made. However, now on the test machine, it throws the following exception immediately upon opening: System.NullReferenceException: Object reference not set to an instance of an object. at PSRD_Specs_Database_Administrat.mainMenu.mainMenu_Load(Object sender, EventArgs e) at System.Windows.Forms.Form.OnLoad(EventArgs e) at System.Windows.Forms.Form.OnCreateControl() at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl() at System.Windows.Forms.Control.WmShowWindow(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ScrollableControl.WndProc(Message& m) at System.Windows.Forms.ContainerControl.WndProc(Message& m) at System.Windows.Forms.Form.WmShowWindow(Message& m) at System.Windows.Forms.Form.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) The only thing that I changed in this version that pertains to mainMenu_Load is the way that the connection string to the database is called. Previously, I had set a string with the connection string on every form that I needed to call it from, like: string conString = "Data Source = SHAREPOINT;Trusted_Connection = yes;" + "database = CustomerDatabase;connection timeout = 15"; As my app grew and I added forms to it, I decided to add an App.config to the project. I defined the connection string in it: <connectionStrings> <add name="conString" providerName="System.Data.SqlClient" connectionString="Data Source = SHAREPOINT;Trusted_Connection = yes;database = CustomerDatabase;connection timeout = 15" /> </connectionStrings> I then created a static string that would return the conString: public static string GetConnectionString(string conName) { string strReturn = string.Empty; if (!(string.IsNullOrEmpty(conName))) { strReturn = ConfigurationManager.ConnectionStrings[conName].ConnectionString; } else { strReturn = ConfigurationManager.ConnectionStrings["conString"].ConnectionString; } return strReturn; } I removed the conString variable and now call the connection string like so: PublicMethods.GetConnectionString("conString").ToString() It appears that this is giving me the error. I changed these instances to directly call the connection string from App.config without using GetConnectionString. For instance, in a SQLConnection: using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conString"].ConnectionString)) This also threw the exception. However, when I went back to using the conString variable on each form, I had no issues. What I don't understand is why all three methods work fine on my development machine, while using the App.config directly or via the static string I created throw exceptions.

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PHP: How to find connections between users so I can create a closed friend circle?

- by CuSS

Hi all, First of all, I'm not trying to create a social network, facebook is big enough! (comic) I've chosen this question as example because it fits exactly on what I'm trying to do. Imagine that I have in MySQL a users table and a user_connections table with 'friend requests'. If so, it would be something like this: Users Table: userid username 1 John 2 Amalia 3 Stewie 4 Stuart 5 Ron 6 Harry 7 Joseph 8 Tiago 9 Anselmo 10 Maria User Connections Table: userid_request userid_accepted 2 3 7 2 3 4 7 8 5 6 4 5 8 9 4 7 9 10 6 1 10 7 1 2 Now I want to find circles between friends and create a structure array and put that circle on the database (none of the arrays can include the same friends that another has already). Return Example: // First Circle of Friends Circleid => 1 CircleStructure => Array( 1 => 2, 2 => 3, 3 => 4, 4 => 5, 5 => 6, 6 => 1, ) // Second Circle of Friends Circleid => 2 CircleStructure => Array( 7 => 8, 8 => 9, 9 => 10, 10 => 7, ) I'm trying to think of an algorithm to do that, but I think it will take a lot of processing time because it would randomly search the database until it 'closes' a circle. PS: The minimum structure length of a circle is 3 connections and the limit is 100 (so the daemon doesn't search the entire database) EDIT: I've think on something like this: function browse_user($userget='random',$users_history=array()){ $user = user::get($userget); $users_history[] = $user['userid']; $connections = user::connection::getByUser($user['userid']); foreach($connections as $connection){ $userid = ($connection['userid_request']!=$user['userid']) ? $connection['userid_request'] : $connection['userid_accepted']; // Start the circle array if(in_array($userid,$users_history)) return array($user['userid'] => $userid); $res = browse_user($userid, $users_history); if($res!==false){ // Continue the circle array return $res + array($user['userid'] => $userid); } } return false; } while(true){ $res = browse_user(); // Yuppy, friend circle found! if($res!==false){ user::circle::create($res); } // Start from scratch again! } The problem with this function is that it could search the entire database without finding the biggest circle, or the best match.

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HTML Encoding Blocks - Invalid expression term ':'

- by Jamie Dixon

Hey everyone, I'm developing a new ASP.NET MVC 2.0 application and wanting to use the new ASP.NET 4 encoding blocks. My View code contains <%: Model.ActivityName %> however Visual Studio is reporting: Unexpected toke at the position of the : (colon). When I run the application I get the following compilation error: Compiler Error Message: CS1525: Invalid expression term ':' What am i missing? Cheers for any help/advice.

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Data Processing in Business Intelligence Applications

- by Manoj

Is data processing a part of business intelligence tools? If no how else is it done or if yes can you give a few examples. My use case: I am using pentaho reporting to generate tables and graphs of my test data. Now I want to compare the data against the spec and see if it passes or fails and report the same. The spec is also in the database. How best to do it?

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ADO.net, Check if ObjectContext is writeable

- by user287107

I have an embedded database in an asp.net mvc project. If I try to write to the file, I sometimes get a write failed exception because the SQL Server can't write to the file. How can I check an ObjectContext, if its writeable, without actually writing something to the database?

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LINQ InsertOnSubmit Required Fields needed for debugging

- by Derek Hunziker

Hi All, I've been using the ADO.NET Strogly-Typed DataSet model for about 2 years now for handling CRUD and stored procedure executions. This past year I built my first MVC app and I really enjoyed the ease and flexibility of LINQ. Perhaps the biggest selling point for me was that with LINQ I didn't have to create "Insert" stored procedures that would return the SCOPE_IDENTITY anymore (The auto-generated insert statements in the DataSet model were not capable of this without modification). Currently, I'm using LINQ with ASP.NET 3.5 WebForms. My inserts are looking like this: ProductsDataContext dc = new ProductsDataContext(); product p = new product { Title = "New Product", Price = 59.99, Archived = false }; dc.products.InsertOnSubmit(p); dc.SubmitChanges(); int productId = p.Id; So, this product example is pretty basic, right, and in the future, I'll probably be adding more fields to the database such as "InStock", "Quantity", etc... The way I understand it, I will need to add those fields to the database table and then delete and re-add the tables to the LINQ to SQL Class design view in order to refresh the DataContext. Does that sound right? The problem is that any new fields that are non-null are NOT caught by the ASP.NET build processes. For example, if I added a non-null field of "Quantity" to the database, the code above would still build. In the DataSet model, the stored procedure method would accept a certain amount of parameters and would warn me that my Insert would fail if I didn't include a quantity value. The same goes for LINQ stored procedure methods, however, to my knowledge, LINQ doesn't offer a way to auto generate the insert statements and that means I'm back to where I started. The bottom line is if I used insert statements like the one above and I add a non-null field to my database, it would break my app in about 10-20 places and there would be no way for me to detect it. Is my only option to do a solution-side search for the keyword "products.InsertOnSubmit" and make sure the new field is getting assigned? Is there a better way? Thanks!

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C# / asp.net: What are your views on .net email components/suites out there?

- by Mark Redman

Found two libraries Rebex (www.rebex.net) and QuikSoft (www.quiksoft.com) any comments on these based on experience or other ones I havent not found? Looking for components that will use SMTP to send a lot of emails for general email notificatins and bulk mailshots. Built in templating would be nice. Also need to receive emails from various accounts. Having the ability to validate and check bounce backs etc would be good for reporting (appreciating that this isnt 100% effective)

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Using OpenID as the only authentication method

- by iconiK

I have read the other questions and they mostly talk about the security of doing so. That's not entirely my concern, mostly because the website is question is a browser-based game. However, the larger issue is the user - not every user is literate enough to understand OpenID. Sure RPX makes this pretty easy, which is what I'll use, but what if the user does not have an account at Google or Facebook or whatever, or does not trust the system to log in with an existing account? They'd have to get an account at another provide - I'm sure most will know how to do it, let alone be bothered to do it. There is also the problem of how to manage it in the application. A user might want to use multiple identities with a single account, so it's not as simple as username + password to deal with. How do I store the OpenID identities of a user in the database? Using OpenID gives me a benefit too: RPX can provide extensive profile information, so I can just prefill the profile form and ask the user to edit as required. I currently have this: UserID Email ------ --------------- 86000 [email protected] 86001 [email protected] UserOpenID OpenID ---------- ------ 86000 16733 86001 16839 86002 19361 OpenID Provider Identifier ------ -------- ---------------- 16733 Yahoo https:\\me.yahoo.com\bob#d36bd 16839 Yahoo https:\\me.yahoo.com\bigbobby#x75af 19361 Yahoo https:\\me.yahoo.com\alice#c19fd Is that the right way to store OpenID identifiers in the database? How would I match the identifier RPX gave me with one in the database to log in the user (if the identifier is known). So here are concrete questions: How would I make it accessible to users not having an OpenID or not wanting to use one? (security concerns over say, logging in with their Google account for example) How do I store the identifier in the database? (I'm not sure if the tables above are right) What measures do I need to take in order to prevent someone from logging in as another user and happily doing anything with their account? (as I understand RPX sends the identifier via HTTP, so what anyone would have to do is to just somehow grab it then enter it in the "OpenID" field) What else do I need to be aware of when using OpenID?

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Configuring NHibernate to use multiple databases in .net

- by Miral

I am using c#.net and we are using nhibernate. It was fine until i was connecting to a single database. Now in the same project i am suppose to use multiple database, how can this be achived.

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MySQL Backup: Can I copying individual MyISAM table files to another server with different MySQL ver

- by Komputer

I means copying individual MyISAM table files is: (shut down mysqld and copy the .frm, .myd, and .myi files from one database folder to another) Question: (a) can I use this way to backup MySQL database folder from one server to another server with different MySQL version? (b) can this backup files moved to different OS? (example: debian to centos) thanks in advance.

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Where is the future of databases?

- by Danny

I'm a bit frustrated with my MySQL database at the moment, so I've been thinking about all the things I'd like to see in the database of the future. But I thought it would be fun to hear other people's thoughts too--I'm not a pro by any means.

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How to format this string in c#

- by Rohit

I have a setting stored in database which has a value .jpg|.gif|.png . I want to display it on frontend as ".jpg",".gif" and ".png" in a single string. for example Allowed formats are ".jpg",".gif" and ".png" I was able to seperate it using string fileTypes = String.Join(",", supportedFileTypes.Split('|')) How to specify and clause before the last string. It has to be dynamic. For example if we have .jpg|.gif in database, it should be Allowed formats are ".jpg" and ".gif".

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Has there been a Firefox update recently?

- by Rob Nicholson

Has there been an update to Firefox recently? Users are reporting they are unable to use my web application when using Firefox (can't enter text into Infragistics grid). I've not changed anything recently and it works when I try with Firefox. So more of a general "Has there been an significant upgrade recently?" kind of question. Thanks, Rob.

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Oracle Enterprise Server SOAP/Servlet/SoapRouter

- by JACK

Does anyone know any sample Oracle SOAP XML requests that that queries the database? For example, the url: http://myoracle:7778/oracle/soap/soaprouter/ I'd like to program xml requests and get return xml database. But I have no idea on the Oracle SOAP format. Please provide an example.

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NSIS Vs WiX Vs AnyOther Installation Package

- by Sandeep Jindal

Hi, Need to create a Installation Package that would need to a) install a Database, b) create database and tables, c) installed already created installable in Visual Studio, d) create ODBC datasource, e) copy files. f) create shortcuts, etc Can you please suggestion which one to use? To simplify following would be my criteria(Descending Order) Stable Fullfill all my needs. Easy to learn Can you please suggest? Sandeep Jindal

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Extracting the source code of a facebook page with JavaScript

- by Hafizi Vilie

If I write code in the JavaScript console of Chrome, I can retrieve the whole HTML source code by entering: var a = document.body.InnerHTML; alert(a); For fb_dtsg on Facebook, I can easily extract it by writing: var fb_dtsg = document.getElementsByName('fb_dtsg')[0].value; Now, I am trying to extract the code "h=AfJSxEzzdTSrz-pS" from the Facebook Page. The h value is especially useful for Facebook reporting. How can I get the h value for reporting? I don't know what the h value is; the h value is totally different when you communicate with different users. Without that h correct value, you can not report. Actually, the h value is AfXXXXXXXXXXX (11 character values after 'Af'), that is what I know. Do you have any ideas for getting the value or any function to generate on Facebook page. The Facebook Source snippet is below, you can view source on facebook profile, and search h=Af, you will get the value: <code class="hidden_elem" id="ukftg4w44">  </code> Please guide me. How can extract the value exactly? I tried with following code, but the comment block prevent me to extract the code. How can extract the value which is inside comment block? var a = document.getElementsByClassName('hidden_elem')[3].innerHTML;alert(a);

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Recursive Query Help

- by Josh

I have two tables in my database schema that represent an entity having a many-to-many relationship with itself. Role --------------------- +RoleID +Name RoleHasChildRole --------------------- +ParentRoleID +ChildRoleID Essentially, I need to to be able to write a query such that: Given a set of roles, return the unique set of all related roles recursively. This is an MSSQL 2008 Database.

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Using Excel to work with SQL data (read/write)

- by Tyler Brock

I have a ton of data in a sql database which I would like to be able to import and display in excel (I can already do this) and additionally modify or append to the dataset within excel and write the changes/additions back to the database. What is the best way to go about doing something like this? Please let me know, thanks!

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how to Implement Cruise Control with QTP?

- by gurdevqa

I would like to integrate QTP with Cruise Control, which I have done so far, i'm stuck at the reporting part. I would like to somehow report back to Cruise Control with the results, how can I accomplish this? Please help?

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PostgreSQL cross server query?

- by AlexRednic

Is there a way that I might query a database located on "Server 2" and get my data in "Server 1" ? That is return a set of records from a remote server to my local one. PS: Not cross database query on same server because I know how to do that with dblink.

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Using gcc compiler flag in Xcode

- by tech74

Hi, Shark has identified a area of code to be improved - Unaligned loop start and recommends adding -falign-loops=16 (gcc compiler flag). I've added this to Other C flags in iphone Xcode both to the dependant project and top level project. However it still does not seem to affect the performance and Shark is still reporting the same problem so it appears it didn't work. Am i doing this correctly?

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