UnauthorizedAccessException: Invalid cross-thread access.

Damir Dobric Posts

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When working with WCF DataServices in Silverlight 3 your callback methods have been executed on the UI-thread.
Here is one example which works in Silverlight 3.0.


   private void onOperationCompleted(IAsyncResult result)
DataServiceQuery<View> ctx = result.AsyncState as DataServiceQuery< View >;

     ViewData.Result = ctx.EndExecute(result);


When this is migrated to Silverlight 4.0 following exception is thrown:


The solution for this looks like:

  private void onOperationCompleted(IAsyncResult result)
     Deployment.Current.Dispatcher.BeginInvoke(() =>
DataServiceQuery<View> ctx = result.AsyncState as DataServiceQuery<View>;

IEnumerable< View > stations = ctx.EndExecute(result);

ViewData.Result = ctx.EndExecute(result);


Posted Apr 22 2010, 04:36 PM by Damir Dobric
Filed under: ,


Klin wrote re: UnauthorizedAccessException: Invalid cross-thread access.
on 06-03-2010 8:56


it's works!!!

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