System.Exception: Catastrophic failure

[Mike Gorney]

I have a grid column with the cell template below:

<telerikGridView:GridViewDataColumn.CellTemplate>
                                                <DataTemplate>
                                                    <StackPanel Orientation="Horizontal">
                                                        <Image Source="{Binding HostNameUrl}" Stretch="None"></Image>
                                                        <TextBlock Text="{Binding HostName}"></TextBlock>
                                                    </StackPanel>
                                                </DataTemplate>
                                            </telerikGridView:GridViewDataColumn.CellTemplate>

The HostNameUrl for the Image is a URL to a local resource I set from a property like:

public string HostNameUrl
{
get{
string path = string.empty;

switch(somevariable)
case 1:
return "Icons/FirstIcon.png";
case 2:
return "Icons/SecondIcon.png";
}
}

This works perfect 99% of the time.  Occasionaly I get this exception upon calling GridView.Rebind():

System.Exception: Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))
   at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
   at MS.Internal.XcpImports.FrameworkElement_SetStyleValue(FrameworkElement doh, DependencyProperty property, PropertyInvalidationReason reason)
   at System.Windows.DependencyObject.ClearValueInternal(DependencyProperty dp)
   at System.Windows.DependencyObject.ClearValue(DependencyProperty dp)
   at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.UnlinkContainerFromItem(DependencyObject container, Object item, Boolean isRecycled)
   at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.UnlinkContainerFromItem(DependencyObject container, Object item)
   at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.System.Windows.Controls.Primitives.IItemContainerGenerator.RemoveAll()
   at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.OnRefresh()
   at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
   at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs args)
   at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at Telerik.Windows.Data.DataItemCollection.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at Telerik.Windows.Data.DataItemCollection.Telerik.Windows.Data.IWeakEventListener<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.ReceiveWeakEvent(Object sender, NotifyCollectionChangedEventArgs e)
   at Telerik.Windows.Data.WeakEvent.WeakListener`1.Handler(Object sender, TArgs args)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at Telerik.Windows.Data.QueryableCollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
   at Telerik.Windows.Data.QueryableCollectionView.RefreshAndRaiseCollectionChanged(NotifyCollectionChangedEventArgs args)
   at Telerik.Windows.Data.QueryableCollectionView.Refresh()
   at Telerik.Windows.Controls.DataControl.Rebind()
   at SightMaxSL.MainPage.EndInviteSessionToChat(Boolean success, UiVisitorSession session)

what is strange, is that if i catch this exception, and immediately call Rebind(), it works and displays the proper image.  Any pointers on where I should be looking?

Edit: i should note that it is an ObservableCollection<T> that I am binding the grid to.

[Milan]

Hi Mike Gorney,

This seems like a bug in RadGridView but I am curious why you need to call Rebind. Rebind is usually used to refresh the grid when it is bound to non-observable collection. Could you please try to run your application without calling Rebind? If that is not possible I would like to ask you to send us your application so that we can try to isolate the problem. 

Regards,
Milan
the Telerik team

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[Mike Gorney]

I have to call Rebind() because the value of the property is determined by a another private variables state.  So the collection actually receives no notification that the value of the property has changed.