An unhandled exception of type 'System.NullReferenceException' occurred in Telerik.WinControls.GridView.dll

4 posts, 0 answers
  1. Jo
    Jo avatar
    1 posts
    Member since:
    Jul 2013

    Posted 27 Jan 2014 Link to this post

    Greetings,
    I am getting the following exception when touch quickly different editable rows in the grid. The Telerik version is 2012.1.321.40.


    System.NullReferenceException: Object reference not set to an instance of an object.
       at Telerik.WinControls.UI.GridViewEditManager.BeginEdit()
       at Telerik.WinControls.UI.GridViewEditManager.OnPositionChanged(PositionChangedEventArgs args)
       at Telerik.WinControls.UI.GridViewEditManager.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
       at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
       at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
       at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
       at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
       at Telerik.WinControls.UI.GridViewSynchronizationService.RaiseCurrentChanged(GridViewTemplate template, GridViewRowInfo row, GridViewColumn column, Boolean user)
       at Telerik.WinControls.UI.BaseGridNavigator.SelectCore(GridViewRowInfo row, GridViewColumn column)
       at Telerik.WinControls.UI.BaseGridNavigator.Select(GridViewRowInfo row, GridViewColumn column)
       at Telerik.WinControls.UI.GridRowBehavior.SelectPositionOnMouseDownLeft(MouseEventArgs e, GridRowElement rowElement, GridCellElement cellElement)
       at Telerik.WinControls.UI.GridRowBehavior.OnMouseDownLeft(MouseEventArgs e)
       at Telerik.WinControls.UI.GridRowBehavior.OnMouseDown(MouseEventArgs e)
       at Telerik.WinControls.UI.BaseGridBehavior.OnMouseDown(MouseEventArgs e)
       at Telerik.WinControls.UI.RadGridView.OnMouseDown(MouseEventArgs e)
       at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       at Telerik.WinControls.RadControl.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
  2. George
    Admin
    George avatar
    500 posts

    Posted 30 Jan 2014 Link to this post

    Hello Jo,

    Thank you for contacting us.

    I am not able to determine the what the problem may be from the provided information. I would like to kindly ask you to send me some additional details along with steps which will reproduce the issue.

    Looking forward to your response.

    Regards,
    George
    Telerik
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  4. Supriya
    Supriya avatar
    1 posts
    Member since:
    Nov 2013

    Posted 24 Mar 2015 in reply to George Link to this post

    Hi ,
    I am getting same error after I upgraded Telerik from 2012 Q2 to 2013 Q3 using VS 2013.

    An unhandled exception of type 'System.NullReferenceException' occurred in Telerik.Windows.Controls.FixedDocumentViewers.dll

    Please advise?
  5. Dess
    Admin
    Dess avatar
    1609 posts

    Posted 25 Mar 2015 Link to this post

    Hello Supriya,

    Thank you for writing.

    The provided information is not enough for me to reproduce the error on my end. Without a reproducible scenario or a sample code snippet replicating the issue we can make only conjectures what is causing the problem. That is why I would kindly ask you to specify the exact steps how to reproduce the problem or give us some code snippet which leads to the described error. Alternatively, you can open a support ticket where you can attach a sample project so I can investigate the precise case and assist you further. Thank you in advance.

    I am looking forward to your reply.

    Regards,
    Dess
    Telerik
     

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