error in rendering control

[tcl4p]

I made a change to the property AllowCustomText setting it to false and when I did I received the following message where the control was on the page. "There was an error rendering the control.  Unable to cast object of type telerik.web.control.radcombobx to telerik.web.control.radcombobox.  What does this mean and how do I correct it?

[Veselin Vasilev]

Hello tcl4p,

I suppose this is a design-time error.

If the Telerik.Web.UI.dll assembly is updated while a page using RadControl(s) is in Design-Time, VisualStudio creates two different versions of the assembly, hence two different versions of the same RadControl(s) are available.

Suggested solution:

Restart Visual Studio.

Best wishes,
Veselin Vasilev
the Telerik team

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[tcl4p]

Thanks for the reply, but restarting Visual Studio did not work.  Every time I change a property for the combo box, I get the same error.

Tom

[Veselin Vasilev]

Hello,

Let us know the exact version of the Visual studio, any service packs installed?
What is the target framework and the exact version of the RadControls.
Do you have the Telerik.Web.Design assembly in the GAC?

Sincerely yours,
Veselin Vasilev
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

[tcl4p]

I'm using visual studio 2008 with all of the latest service packs version3.5 sp1. I have installed Q2 2008 controls.  I'm not sure what your referring to with the Telerik.Web.Design assembly in the GAC, but I do not see any such item in my program references.

Thanks,
Tom

[Simon]

Hello tcl4p,

Please try the following:

1. Remove all references to the Telerik.Web.UI assembly.
2. Close all Design-time VS documents.
3. Close VS and delete the ASP.NET cache of your Web Site/Project located in DRIVE:\Windows\Microsoft.NET\Framework\v[...]\Temporary ASP.NET Files
4. Open VS and add the Telerik.Web.UI reference.

Does this help?

All the best,
Simon
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

[tcl4p]

Thanks, that did it.

Tom