[Solved] Error when grouping/sorting and asynchronous

[Ben]

Hello,

I am running into an error using the Q2 2009 release of RadControls for Silverlight.  I currently have a simple SIlverlight application that uses Linq to Sql and a WCF service to retrieve data to populate the RadGridView.  I am able to successfully load the RadGridView with data, but if i try to group or sort, I receive the error below:

Message: Unhandled Error in Silverlight Application
Code: 4004   
Category: ManagedRuntimeError      
Message: System.InvalidCastException: Unable to cast object of type 'Telerik.Windows.Data.DataRecord' to type 'Telerik.Windows.Data.GroupRecord'.
   at Telerik.Windows.Controls.DataControl.FindRecord(Object dataItem)
   at Telerik.Windows.Controls.GridView.GridViewDataControlExtensions.GetContainerFromDataItem(GridViewDataControl dataControl, Object item)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.SetIsCurrent(Object item, Boolean isCurrent)
   at Telerik.Windows.Data.Selection.SelectionHandler.SetCurrentItemCore(Object item)
   at Telerik.Windows.Data.Selection.SelectionHandler.InitializeCurrentItem()
   at Telerik.Windows.Controls.DataControl.InitializeSelection()
   at Telerik.Windows.Controls.GridView.GridViewDataControl.InitializeSelection()
   at Telerik.Windows.Controls.GridView.GridViewDataControl.OnAsyncDataLoadWorkerWorkCompleted(Object sender, RunWorkerCompletedEventArgs e)
   at System.ComponentModel.BackgroundWorker.OnRunWorkerCompleted(RunWorkerCompletedEventArgs e)
   at System.ComponentModel.BackgroundWorker.<OnRun>b__1(Object state)    

Line: 56
Char: 13
Code: 0



Any help would be greatly appreciated,

Ben

 

[Vlad]

Hello Ben,

Do you refer to DataLoadMode="Asynchronous"? If this is the case please turn it off temporary and let me know about the result. Generally for binding with services you do not need this since the service itself is asynchronous and if you want to show the grid loading indicator you can use directly IsBusy property of GridViewDataControl.

Let me know how it goes.

Greetings,
Vlad
the Telerik team

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[Ben]

That fixed it.  Thanks Vlad.

Also, good call with the IsBusy indicator.  Works nicely as well.

Ben