Hi,

I am using Licensed Xceed grid from long time. 

I have a parent grid and Child grid which are related to each other. Based on the selected row in parent grid, child grid columns will be changing.

So I am dynamically adding and removing columns in child grid (in selection Changed event of parent ).

When i am trying to removing columns in child grid, some times it is crashing with object reference error with stack trace

   at Xceed.Wpf.DataGrid.Views.VirtualizingFixedCellSubPanel.MeasureOverride(Size constraint)

   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

   at System.Windows.UIElement.Measure(Size availableSize)

   at System.Windows.ContextLayoutManager.UpdateLayout()

   at Xceed.Wpf.DataGrid.Views.FixedCellPanel.Xceed.Wpf.DataGrid.Views.IVirtualizingCellsHost.BringIntoView(Cell cell)

   at Xceed.Wpf.DataGrid.VirtualizingCellCollection.OnCellRequestBringIntoView(Object sender, RequestBringIntoViewEventArgs e)

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

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

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

   at System.Windows.FrameworkElement.BringIntoView(Rect targetRectangle)

   at System.Windows.FrameworkElement.BringIntoView()

   at Xceed.Wpf.DataGrid.DataGridContext.SetCurrent(Object item, Row containerRow, Nullable`1 sourceDataItemIndex, ColumnBase column, Boolean forceFocus, Boolean isCancelable, Boolean synchronizeSelectionWithCurrent)

   at Xceed.Wpf.DataGrid.DataGridContext.SetCurrentColumnCore(ColumnBase column, Boolean isCancelable, Boolean synchronizeSelectionWithCurrent)

   at Xceed.Wpf.DataGrid.DataGridContext.HandleMasterColumnsCollectionChanged(NotifyCollectionChangedEventArgs e)

   at Xceed.Wpf.DataGrid.DataGridContext.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type managerType, Object sender, EventArgs e)

   at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)

   at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)

   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

   at Xceed.Wpf.DataGrid.ColumnCollection.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

   at Xceed.Wpf.DataGrid.ColumnCollection.RemoveItem(Int32 index)

   at System.Collections.ObjectModel.Collection`1.Remove(T item)

   at Aveva.Mars.Core.Controls.DataGrid.SynchronizeColumnsDown(IList newItems, IList oldItems) in D:\Development\10.2\erm\net\Aveva.Mars.Core\Source\Controls\DataGrid\DataGrid.Columns.cs:line 86

   at Aveva.Mars.Core.Controls.DataGrid.ColumnsCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e) in D:\Development\10.2\erm\net\Aveva.Mars.Core\Source\Controls\DataGrid\DataGrid.Columns.cs:line 64

   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)

   at System.Collections.ObjectModel.Collection`1.Remove(T item)

Can some one  help me regarding  this.(what might be the cause behind this crash)

Hi Sai Sunil,

Which version of the component are you currently using? If it is not the latest one (build 12267), please download the latest one from our updates center to test with to see if that resolves the issue.

 Updates Center: www.xceed.com/updates

If the issue is still there, then we would need a small stand-alone test project that reproduces the issue in order to investigate further. Please send it to support@xceed.com with a link to this forum thread for reference. Thank you.