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[Solved] InvalidCastException whilst grouping on the RadGrid

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Grid

This is a migrated thread and some comments may be shown as answers.

Gordon asked on 12 Feb 2009, 11:22 AM

I have a radgrid which works really well. I've extended the functionality to use grouping, but whenever a column is dragged to the grouping area, or dragged from the grouping area back to the columns; an InvalidCastException occurs.

    
            [InvalidCastException: Unable to cast object of type 'Telerik.Web.UI.RadGrid' to type 'Telerik.Web.UI.GridTableView'.] 
        
               Telerik.Web.UI.RadGrid.RaisePostBackEvent(String eventArgument) +1692 
        
               System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13 
        
               System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +175 
        
               System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565

I've checked my httphandlers section in the webconfig (as a previous thread suggests), but the relevant Telerik.Web.UI.WebResource.axd entry is already present.

    
            <httpHandlers> 
        
                  <remove verb="*" path="*.asmx" /> 
        
                  <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> 
        
                  <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> 
        
                  <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false" /> 
        
                  <add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false" /> 
        
                </httpHandlers> 
        
                <httpModules> 
        
                  <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> 
        
                </httpModules>

Any ideas?

[Solved] InvalidCastException whilst grouping on the RadGrid

2 Answers, 1 is accepted