Error on load of ComboBox

[Jonathan]

Hi..

I'm getting the following error onLoad() -

Any idea?  Help!  thx

 

Unable to cast object of type 'System.Windows.Automation.Peers.TextBoxAutomationPeer' to type 'System.Windows.Automation.Peers.SelectorItemAutomationPeer'.     at Telerik.Windows.Controls.RadComboBoxAutomationPeer.RaiseSelectionEvents(SelectionChangedEventArgs e)
   at Telerik.Windows.Controls.RadComboBox.SelectItemDelayedSelectionChanged(Object item)

[Jonathan]

Here's more detail

 

Unable to cast object of type 'System.Windows.Automation.Peers.TextBoxAutomationPeer' to type 'System.Windows.Automation.Peers.SelectorItemAutomationPeer'.     at Telerik.Windows.Controls.RadComboBoxAutomationPeer.RaiseSelectionEvents(SelectionChangedEventArgs e)
   at Telerik.Windows.Controls.RadComboBox.SelectItemDelayedSelectionChanged(Object item)
   at Telerik.Windows.Controls.RadComboBox.NotifyComboBoxItemMouseUp(RadComboBoxItem comboBoxItem)
   at Telerik.Windows.Controls.RadComboBoxItem.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

[Sia]

Hello Jonathan,

Could you please provide more details on the exact action steps you take prior to getting the exception as well as more information on your specific setup so that I can better assist you with this? Ideally, would it be possible for you to send over a small sample project with instructions on how to replicate the issue?

Also I need to know whether you use the latest version of Telerik controls or a different one?

Thank you in advance for your cooperation on the matter. I look forward to your reply.

Regards,
Sia
Progress Telerik