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Error Rendering Control - Designtime

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Gary
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Gary asked on 14 Sep 2011, 06:52 PM
I have a ASP.NET site which we are upgrading from .net framework 3.5 to 4.0 and everything seems to be working fine. I also upgraded from telerik dll from 2010.2.929.20 to 2011.1.315.40.

The only problem that I am having is the telerik controls placed in User Control which then placed on aspx page is not rendering in Visual Studio 2010. The user controls is displayed as error -

System.NotSupportedException:Specified method is not supported at System.Web.UI.Design.UserControlDesign.Dummy.RootDesigner.DummyWebFormsReferenceManager.RegisterTahPrefix(Type objectType) at ....(please see complete error in attached file)

I removed the old reference of telerik dlls and added them back again with the new dll..

Versions :
- Visual Studio 2010 Professional
- Telerik Control - 2011.1.315.40
- .net framework 4.0

Please advise.

Thanks.

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Andrey
Telerik team
answered on 19 Sep 2011, 04:23 PM
Hello Gary,

Please, confirm that you have added Telerik.Web.Design.dll to your bin folder. This assembly is responsible for rendering controls Design time. Also, beside these errors, do you experience any problems while running the project?

Regards,
Andrey
the Telerik team
Browse the vast support resources we have to jump start your development with RadControls for ASP.NET AJAX. See how to integrate our AJAX controls seamlessly in SharePoint 2007/2010 visiting our common SharePoint portal
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James
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answered on 21 Oct 2013, 03:16 PM
Hello Support,

I am experiencing a situation with the Telerik Grid not rendering correctly with Visual Studio 2013. In VS 2012, it was working just fine. Is this because the version of the Telerik.Web.UI.dll (2013.1.403.40) not supported in VS 2013 yet?  Do I have to upgrade to the latest version of the Telerik controls?  I also have Telerik.Web.Design.dll and Telerik.Web.UI.Skins.dll in my bin folder.

Thanks for your help in advance!
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James
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answered on 21 Oct 2013, 08:20 PM
Workaround found:

http://blogs.telerik.com/aspnet-ajax/posts/13-07-17/q2-2013-sp1-of-radcontrols-for-asp.net-ajax-is-available-and-vs13-ready

Provided is support for Visual Studio 2013.

Note that there is a well known issue of VS13, which is already reported to Microsoft Connect here and here. The problem is that any call to WebResource.axd returns an empty response, which breaks RadControls. The VS13 development team has promised to fix it, but until that there are a few workarounds that can be used to avoid the bug:

  • Disable VS13 Browser Link feature by clicking on the Browser Link combo button on the Standard toolbar and unchecking "Enable Browser Link"
  • Or disable the debugging <compilation debug="false"> 
  • Or use RadStyleSheetManager.
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