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.
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.
Any ideas?
[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?