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• wcf callback exception after updating to .net 4.0

  - by James

  I have a wcf service that uses callbacks with DualHttpBindings. The service pushes back a datatable of search results the client (for a long running search) as it finds them. This worked fine in .Net 3.5. Since I updated to .Net 4.0, it bombs out with a System.Runtime.FatalException that actually kills the IIS worker process. I have no idea how…

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• ASP.NET ViewState Tips and Tricks #2

  - by João Angelo

  If you need to store complex types in ViewState DO implement IStateManager to control view state persistence and reduce its size. By default a serializable object will be fully stored in view state using BinaryFormatter. A quick comparison for a complex type with two integers and one string property produces the following results measured using…

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• Employee Info Starter Kit - Visual Studio 2010 and .NET 4.0 Version (4.0.0) Available

  - by Mohammad Ashraful Alam

  Employee Info Starter Kit is a ASP.NET based web application, which includes very simple user requirements, where we can create, read, update and delete (crud) the employee info of a company. Based on just a database table, it explores and solves most of the major problems in web development architectural space.  This open…

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• Adding page title to each page while creating a PDF file using itextsharp in VB.NET

  - by Snowy

  I have recently started using itextsharp and gradually learning it. So far I created a PDF file and it seems great. I have added a table and some subtables as the first table cells to hold data. It is done using two for loops. The first one loops through all data and the second one is each individual data displayed in columns. The html…

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• Loading any MVC page fails with the error "An item with the same key has already been added."

  - by MajorRefactoring

  I am having an intermittent issue that is appearing on one server only, and is causing all MVC pages to fail to load with the error "An item with the same key has already been added." Restarting the application pool fixes the issue, but until then, loading any mvc page throws the following exception: Event code: 3005 Event message:…

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• Issues integrating NCover with CC.NET, .NET framework 4.0 and MsTest

  - by Nikhil

  I'm implementing continuous integration with CruiseControl.NET, .NET 4.0, NCover and MsTest. On the build server I'm unable to run code coverage from the Ncover explorer or NCover console. When I run where vstesthost.exe from the Ncover console it returns the Visual Studio 9.0 path and does not seem to pick up .net framework 4.0. I've…

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• Parallelism in .NET – Part 16, Creating Tasks via a TaskFactory

  - by Reed

  The Task class in the Task Parallel Library supplies a large set of features.  However, when creating the task, and assigning it to a TaskScheduler, and starting the Task, there are quite a few steps involved.  This gets even more cumbersome when multiple tasks are involved.  Each task must be constructed, duplicating…

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• how to call web form in vb.net using (asp.net)

  - by maisara

  I am beginer to ASP.Net. Can u tell how to call new page from the existing page. In VB.net by executing the statement "Form2.show()", New page will be loaded. In the same way how to load new page in ASP.Net ?

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• Parallelism in .NET – Part 8, PLINQ’s ForAll Method

  - by Reed

  Parallel LINQ extends LINQ to Objects, and is typically very similar.  However, as I previously discussed, there are some differences.  Although the standard way to handle simple Data Parellelism is via Parallel.ForEach, it’s possible to do the same thing via PLINQ. PLINQ adds a new method unavailable in standard LINQ…

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• Parallelism in .NET – Part 17, Think Continuations, not Callbacks

  - by Reed

  In traditional asynchronous programming, we’d often use a callback to handle notification of a background task’s completion.  The Task class in the Task Parallel Library introduces a cleaner alternative to the traditional callback: continuation tasks. Asynchronous programming methods typically required callback…

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• MVC : Does Code to save data in cache or session belongs in controller?

  - by newbie

  I'm a bit confused if saving the information to session code below, belongs in the controller action as shown below or should it be part of my Model? I would add that I have other controller methods that will read this session value later. public ActionResult AddFriend(FriendsContext viewModel) { if…

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• add c# user control to existing asp.net vb.net project

  - by Fidel

  Hello, I've got an existing asp.net project written in vb.net. Another person has written a user control in c#. Could you please let me know the steps for adding that C# user control to the vb.net app? I've tried copying them to the folder and using "Add existing item", however it doesn't compile the code…

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• An Unusual UpdatePanel

  - by João Angelo

  The code you are about to see was mostly to prove a point, to myself, and probably has limited applicability. Nonetheless, in the remote possibility this is useful to someone here it goes… So this is a control that acts like a normal UpdatePanel where all child controls are registered as postback triggers…

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• ASP.NET AND ASP.NET MVC difference

  - by Guru

  I've heard so many times about ASP.NET and ASP.NET MVC. I've worked on some ASP.NET Webforms projects but I'm still not cleared about the difference between both of them.

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• .NET Regex: Howto extract IPv6 address parts

  - by Quandary

  Question: How does the .NET regex string to extract IPv6 addresses look like ? I can get it to extract a simple IPv6 address like "1050:0:0:0:5:600:300c:326b" but not the colon format ("ff06::c3"); My problem is, it should extract a 0 for every omitted value between the :: How do I do that? Below my…

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• .net 2.0 accessing .net 4.0 dll via assembly bindings

  - by Gauls

  Hi, I have a .net 2.0 webservices using .net 2.0 librarys (dll). My config uses assembly binding to use the latest builds,Now the .net2.0 will be migrated to .net 4.0, does this mean i have to move my service to 4.0 as well? Thanks Gauls

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• What's the diffrence btw System property and system environment variable

  - by khue

  Hi all I am not clear about this. When I run a java App or run an Applet in applet viewer,( in the IDE environment), System.getProperty("java.class.path") give me the same as System.getenv("CLASSPATH"), which is the CLASSPATH env variable defined. But when I deploy my applet to webserver and access…

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• Ftp throws WebException only in .NET 4.0

  - by Trakhan

  I have following c# code. It runs just fine when compiled against .NET framework 3.5 or 2.0 (I did not test it against 3.0, but it will most likely work too). The problem is, that it fails when built against .NET framework 4.0. FtpWebRequest Ftp = (FtpWebRequest)FtpWebRequest.Create(Url_ +…

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• Using JSON.NET for dynamic JSON parsing

  - by Rick Strahl

  With the release of ASP.NET Web API as part of .NET 4.5 and MVC 4.0, JSON.NET has effectively pushed out the .NET native serializers to become the default serializer for Web API. JSON.NET is vastly more flexible than the built in DataContractJsonSerializer or the older JavaScript serializer. The…

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• Parallelism in .NET – Part 2, Simple Imperative Data Parallelism

  - by Reed

  In my discussion of Decomposition of the problem space, I mentioned that Data Decomposition is often the simplest abstraction to use when trying to parallelize a routine.  If a problem can be decomposed based off the data, we will often want to use what MSDN refers to as Data Parallelism as…

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• A DirectoryCatalog class for Silverlight MEF (Managed Extensibility Framework)

  - by Dixin

  In the MEF (Managed Extension Framework) for .NET, there are useful ComposablePartCatalog implementations in System.ComponentModel.Composition.dll, like: System.ComponentModel.Composition.Hosting.AggregateCatalog System.ComponentModel.Composition.Hosting.AssemblyCatalog …

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• What I saw at TechEd North America 2014

  - by Brian Schroer

  Originally posted on: http://geekswithblogs.net/brians/archive/2014/05/19/teched-north-america-2014.aspxI was thrilled to be able to attend TechEd North America 2014 in Houston last week. I got to go to Orlando in 2008, and since then I’ve had to settle for watching the sessions…

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• How do you handle EF Data Contexts combined with asp.net custom membership/role providers

  - by KallDrexx

  I can't seem to get my head around how to implement a custom membership provider with Entity Framework data contexts into my asp.net MVC application. I understand how to create a custom membership/role provider by itself (using this as a reference). Here's my current setup: …

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• ASP.Net 4.0 - Response required in SiteMap building?

  - by Nick Craver

  I'm running into an issue upgrading a project to .Net 4.0...and having trouble finding any reason for the issue (or at least, the change causing it). Given the freshness of 4.0, not a lot of blogs out there for issues yet, so I'm hoping someone here has an idea. Preface:…

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• ASP.NET: Custom MembershipProvider with a custom user table

  - by blahblah

  I've recently started tinkering with ASP.NET MVC, but this question should apply to classic ASP.NET as well. For what it's worth, I don't know very much about forms authentication and membership providers either. I'm trying to write my own MembershipProvider which will be…

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