NullReferenceException

[Giorgio Galante]

RadTreeListView is blowing up my extremely simple app right after I expand a collapsed node...  Come on Telerik - you're QA has been pretty #!$$ poor this release.  I've tried using your stuff at work and at home (separate licenses) and there are show-stopper bugs in both projects, different controls (RadTileView at work...ticket submitted, and now RadTreeListView at home) and yes I've tried the latest internal builds.  No Joy.  This is frustrating.  I'm probably dumping telerik for my home projects when my support contract expires in September.  My current client has purchased 7 licenses in the past week on my recommendations.  This doesn't make me look good.

Object reference not set to an instance of an object.   at Telerik.Windows.Controls.GridView.Automation.GridViewVirtualizingPanelAutomationPeer.GetChildrenCore() in c:\Builds\WPF_Scrum\Release_WPF_2010_Q2\Sources\Development\Controls\GridView\GridView\GridView\Automation\GridViewVirtualizingPanelAutomationPeer.cs:line 79

   at System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()

   at System.Windows.Automation.Peers.AutomationPeer.GetChildren()

   at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)

   at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)

   at System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)

   at System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(AutomationPeer connectedPeer)

   at System.Windows.Automation.Peers.AutomationPeer.AutomationPeerFromInputElement(IInputElement focusedElement)

   at System.Windows.Automation.Peers.AutomationPeer.RaiseFocusChangedEventHelper(IInputElement newFocus)

   at System.Windows.Input.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp)

   at System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)

   at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)

   at System.Windows.Input.KeyboardDevice.Focus(IInputElement element)

   at System.Windows.UIElement.Focus()

   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonDown(MouseButtonEventArgs e)

   at System.Windows.UIElement.OnMouseLeftButtonDownThunk(Object sender, MouseButtonEventArgs e)

   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

   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.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)

   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)

   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)

   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

   at System.Windows.UIElement.RaiseTrustedEvent(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, WindowMessage 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, Int32 numArgs)

   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

   at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)

   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)

   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)

   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)

   at System.Windows.Threading.Dispatcher.Run()

   at System.Windows.Application.RunDispatcher(Object ignore)

   at System.Windows.Application.RunInternal(Window window)

   at System.Windows.Application.Run(Window window)

   at System.Windows.Application.Run()

   at ADD2Do.WPFClient.App.Main() in C:\sandbox\ADD2Do\trunk\ADD2Do.WPFClient\obj\x86\Debug\App.g.cs:line 0

   at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)

   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)

   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()

   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)

   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

   at System.Threading.ThreadHelper.ThreadStart()

[Vlad]

Hi,

 I'm sorry to hear that you have problems with our products however we will need a bit more info on all these in order to provide you fix if necessary. Can you reproduce this issue on our examples or you get this only in your project? Can you post more info about your environment? We fixed similar problem recently related to Tablet PC service -  can you try to turn this off temporary to make sure if the problem again is related to this or not?

Let me know how it goes!

Regards,
Vlad
the Telerik team