Wpf userContorl Multiple Select

[wenyue]

when I MultipleSelect userContorl   or RadGridView Multiple Select rows  is   error  System.NullReferenceException

please help me : 
error message

"   in System.Windows.Automation.Peers.AutomationPeer.EnsureChildren()\r\n 
in System.Windows.Automation.Peers.AutomationPeer.GetChildren()\r\n  
in System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n 
in System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n 
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n 
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n 
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n 
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n 
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.isDescendantOf(AutomationPeer parent)\r\n 
在 System.Windows.Automation.Peers.AutomationPeer.ValidateConnected(AutomationPeer connectedPeer)\r\n
在 System.Windows.Automation.Peers.AutomationPeer.AutomationPeerFromInputElement(IInputElement focusedElement)\r\n 
在 System.Windows.Automation.Peers.AutomationPeer.RaiseFocusChangedEventHelper(IInputElement newFocus)\r\n
在 System.Windows.Input.KeyboardDevice.ChangeFocus(DependencyObject focus, Int32 timestamp)\r\n
在 System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)\r\n
在 System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew)\r\n
在 System.Windows.Input.KeyboardDevice.Focus(IInputElement element)\r\n 
在 System.Windows.UIElement.Focus()\r\n 
在 Telerik.Windows.Controls.GridView.EditContext.OnCellMouseDown(GridViewCell cell)
位置 c:\\Builds\\WPF_Scrum\\Release_WPF\\Sources\\Development\\Controls\\GridView\\GridView\\GridView\\Editing\\EditContext.cs
:line 292\r\n
在 Telerik.Windows.Controls.GridView.GridViewCell.OnMouseLeftButtonDown(MouseButtonEventArgs e)
位置 c:\\Builds\\WPF_Scrum\\Release_WPF\\Sources\\Development\\Controls\\GridView\\GridView\\GridView\\Cells\\GridViewCell.cs:行号 370\r\n
在 System.Windows.UIElement.OnMouseLeftButtonDownThunk(Object sender, MouseButtonEventArgs e)\r\n
在 System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)\r\n
在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)\r\n
在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)\r\n
在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)\r\n
在 System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)\r\n 
在 System.Windows.UIElement.CrackMouseButtonEventAndReRaiseEvent(DependencyObject sender, MouseButtonEventArgs e)\r\n 
在 System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)\r\n
在 System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)\r\n
在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)\r\n 
在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)\r\n
在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)\r\n
在 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)\r\n
在 System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)\r\n
在 System.Windows.Input.InputManager.ProcessStagingArea()\r\n 
在 System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)\r\n
在 System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)\r\n
在 System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)\r\n 
在 System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)\r\n  
在 System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)\r\n
在 MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)\r\n
在 MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)\r\n
在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)\r\n
在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)\r\n 
在 System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)\r\n 
在 System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)\r\n  
在 System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)\r\n 
在 MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)\r\n  
在 MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)\r\n 
在 System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)\r\n
在 System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)\r\n
在 System.Windows.Threading.Dispatcher.Run()\r\n 
在 System.Windows.Application.RunDispatcher(Object ignore)\r\n 

[Vlad]

Hello,

 Can you post more info about the grid version?

Kind regards,
Vlad
the Telerik team

[wenyue]

thank you for  answer me .


I think is UserControl error

in a  warpPanel  add  ten UserControl , when I  select Tow or more  UserControl   the Error  Display  : 
isn't  display  everyTime
 please  help  me

[Yordanka]

Hello wenyue,

Unfortunately, we are unable to reproduce the described exception. We may suggest you to try several things that can help us to identify the problem:
1. Download our latest internal build (version .1022) and check with it.
2. Verify that TabletPCInputService is stopped. If it is started, you can try  to stop it and then to test your application.
If the exception is available after you examine both steps, please send us your sample application and specify the version of the Telerik controls so, we will be able to debug the problem.

Kind regards,
Yordanka
the Telerik team