Not sure if they are 100% related but it is a suspious coincidence. Join our community for more solutions or to ask questions. Web.SessionStateModule or a custom session state module is included in the
Some developers claim this solved the problem for them. I ended up just reverting the project back to vs2008 for now. This is shocking to me that something of this magnitude was able to make it into the final version as this is a HUGE bug on the MSFT side. Of note, it is a Web Application project (originally written in vs2003, with .net 1.1) that has been updated to vs2008 and .net 2.0. https://blogs.msdn.microsoft.com/webdev/2010/04/15/controls-state-error-creating-control-in-the-design-view-in-visual-studio-2010/
Expand the column to be able to read the version at the right If all you see see is 2010.3.1317.35, this is your problem. Subsequently,I noticed rendering and/or creating control errors on aspx pages at design time on several development machines. Error was caused by the property of type 'List Of' not being readonly.
In case you had already taken a look, thanks for trying. Here are the steps to follow: Download and extract the archive to a folder of your choice Close all Visual Studio instances Double-click the .reg file (use the Remove_AssemblyFoldersEx_32bitMachine.reg for 32-bit For more information, see ASP.NET Web Parts Controls. Most of my pages inherit class "MembersPage" and inside of this class i use this: Protected Overrides Sub OnInit(ByVal e As System.EventArgs) If Session("UserID") = 0 Then
VS 13, VS 12, Vs 2008?How do I enable Visual Studio 2010 toolset as valid option in Visual Studio 2013?How do I stop Visual Studio 2010 deleting CSS properties?How do I Pete P.S.: I found a permanent "fix" for this problem with modalpopuextender and updatepanel. You totally found it. https://www.experts-exchange.com/questions/23914617/How-to-handle-exception-Error-rendering-control-at-designMode-in-Visual-Studio.html It seems that for some reason Visual Studio loads several instances of the Telerik.Web.UI assembly into its AppDomain, which results in the error above.
Thanks! 7 years ago Reply Edward Forgacs The problem seems to be that VS 2008 didn't run the OnInit method in the actual page at design time, but VS 2010 does. I upgraded the project into VS10 and while the project builds fine, I cant open any of the web pages in the designer. Images and Photos Web Graphics Software Polish Reports in Access Video by: crystal Polish reports in Access so they look terrific. The errors shouldn't be there anymore Hope this will help anyone who has the problem..
Thanks, Thani 7 years ago Reply Jinal Hello, I created WebApplication Project but i am not able to reproduce it. http://www.telerik.com/forums/error-rendering-control-unable-to-cast-object-of-typea-to-typea-75309ca98a0e i was getting the same issue and was wondering whts wrong, I even modified my web.config but ddnt help. An unhandled exception has occurred. Restart Visual Studio Hope this helps.
I'll let you know. 7 years ago Reply Web Development Tools Microsoft Can you send me the project that reproduces the issue to anhphan AT microsoft.com? http://gmailpush.com/visual-studio/visual-studio-2008-error-dw20-exe.html Browse other questions tagged asp.net visual-studio-2008 custom-controls or ask your own question. To report a bug, go to: http://connect.microsoft.com/VisualStudio/Feedback I'm sorry I couldn't honestly mark anything as an answer. Looking at the docs, you can "fix" the validators by simply setting the EnableClientScript property to "false".
I'm sure many more people will have the same headaches over this as i did. 6 years ago Reply marco This work for me: you have to check Session object and If yes, can you post the code here. I changed the namespace, and it also worked. http://gmailpush.com/visual-studio/visual-studio-2008-pdb-error.html I'm on the mobile app and have yet to find the button which lets view An answer before I answer a question.78 Views · View UpvotesView More AnswersRelated QuestionsIs there a
An unhandled exception has occurred. I haven't had a chance to install VS 2008 release yet, which was released on 11/19/2007, but I assume it will fix this problem in that version also. That would really help with the investigation.
Using Elemental Attunement to destroy a castle Is there any way to bring an egg to its natural state (not boiled) after you cook it? The UpdatePanel is not part of the AjaxControlToolkit, it's in System.Web.Extensions (GAC). Object reference not set to an instance of an object. I am not able to have the workaround working for me… Thanks in advance. 6 years ago Reply Web Development Tools Microsoft Mauro, VB.NET code would look like: If Context IsNot
The grey block appears when modifying a property of type "List Of" in the property window. FileUpload controls when they are used to upload files as part of an asynchronous postback. This is very annoying. Check This Out iam also facing the same.
How to Fill Between two Curves Sending a stranger's CV to HR What is an instant of time? I'm getting the "Error: Rendering Control. Posted on 2008-11-18 .NET Programming ASP.NET 1 Verified Solution 4 Comments 1,690 Views Last Modified: 2013-11-26 I have created a custom control which is doing exactly as it should, but for Object reference not set to an instance of an object." message when I try to use an image hyperlink.
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