System.NullReferenceException: When double clicking on Index column

System.NullReferenceException: When double clicking on Index column

Posted by: hemangc on 19 September 2017, 10:52 am EST

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  hemangc

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  Posted 19 September 2017, 10:52 am EST

  Team,

  I am facing very weird issue while grouping implemented. When I double click on index column (left most column which appears before any grid column) and that too for grouped row I am getting below error. If grid is in readonly mode then this issue does not appears. It only appears when readonly is false and when I click on group header row and index column cell. Please suggest what wrong I am doing or this is bug .

  I have highlighted cell with red box which needs to be double clicked in attached file.

  System.NullReferenceException: Object reference not set to an instance of an object.

  at C1.WPF.DataGrid.DataGridRowHeaderPresenter.#0Zj(Object sender, MouseButtonEventArgs e)

  at C1.WPF.DataGrid.DataGridRowHeaderPresenter.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.RouteItem.InvokeHandler(RoutedEventArgs routedEventArgs)

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

  at System.Windows.EventRoute.ReInvokeHandlers(Object source, RoutedEventArgs args)

  at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)

  at System.Windows.UIElement.CrackMouseButtonEventAndReRaiseEvent(DependencyObject sender, MouseButtonEventArgs e)

  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.RouteItem.InvokeHandler(RoutedEventArgs routedEventArgs)

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

  at System.Windows.EventRoute.InvokeHandlers(Object source, RoutedEventArgs args)

  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)
  
  

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  reeva

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  Posted 19 September 2017, 10:52 am EST

  Hello,

  Unfortunately, I am unable to replicate the issue at my end using installed ‘DataGridSamples’ sample of Studio for WPF with the latest 352 build given below:-

  http://prerelease.componentone.com/dotnet30/c1wpflibrary/2013-t2/C1WPFBasicLibrary_3.0.20132.352.zip
  
  http://prerelease.componentone.com/dotnet40/c1wpflibrary/2013-t2/C1WPFBasicLibrary.4_4.0.20132.352.zip

  Could you please clarify which build are you using and how grouping is done at your end?

  Please send across your sample replicating the issue so that we could proceed further on this.

  Thanks,
  
  Reeva