NullReferenceException by adding row

2 posts, 0 answers
  1. Ates
    Ates avatar
    15 posts
    Member since:
    Nov 2010

    Posted 15 Oct 2015 Link to this post

    Hello

    I am using the radgridview and when adding a row I receive sometimes the following error message:

    System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
       bei Telerik.Windows.Controls.GridView.GridViewDataControl.<ShowInsertRowIfNeeded>b__3f(FrameworkElement f)
       bei Telerik.Windows.Controls.GridView.GridViewDataControl.<>c__DisplayClass84.<CallbackAction>b__83(FrameworkElement f)
       bei Telerik.Windows.Controls.GridView.GridViewDataControl.FlatLayoutStrategy.<>c__DisplayClassfa.<ScrollRowIndexIntoView>b__f5()
       bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       bei System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
       bei System.Windows.Threading.DispatcherOperation.InvokeImpl()
       bei System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
       bei System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       bei System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       bei System.Windows.Threading.DispatcherOperation.Invoke()
       bei System.Windows.Threading.Dispatcher.ProcessQueue()
       bei System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       bei MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       bei MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
       bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       bei System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
       bei System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       bei MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       bei MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
       bei System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       bei System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
       bei System.Windows.Window.ShowHelper(Object booleanBox)
       bei System.Windows.Window.Show()
       bei System.Windows.Window.ShowDialog()
       bei Telerik.Windows.Controls.InternalWindow.WindowWithNoChromeWindowHost.Open(Boolean isModal)
       bei Telerik.Windows.Controls.WindowBase.ShowWindow(Boolean isModal)...


    Do you know what the source of this error message is? And even better how can I solve this or find a solution without this error message?

    Note - we have been able to narrow it down to the following scenarios (at current time):
    - the error occurs if I add very quickly in succession new rows to the grid
    - the error occurs if the computer hard drive is maxed out and I add rows normally (not fast)

     

    Sincerly,

    Kasar

  2. Stefan X1
    Admin
    Stefan X1 avatar
    523 posts

    Posted 20 Oct 2015 Link to this post

    Hello Ates,

    I have already replied you in the support thread you opened regarding this issue. In order to avoid double posting, I would kindly ask you to continue any further communication regarding this case in it.

    Regards,
    Stefan
    Telerik
    Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Feedback Portal and vote to affect the priority of the items
  3. UI for WPF is Visual Studio 2017 Ready
Back to Top