[Solved] There's something wrong with GridViewGroupRow?

[hvduc]

I'm using your RadGridView control and group data by 1 property that isn't binded in grid by code-behind (after loaded data completely). Sometime I encounter a error that make my browser clear (application die). IE's error message as below:

Message: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
  at System.ThrowHelper.ThrowArgumentOutOfRangeException()
  at System.Collections.Generic.List`1.get_Item(Int32 index)
 at Telerik.Windows.Controls.GridView.GridViewGroupRow.OnIsExpandedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at Telerik.Windows.PropertyMetadata.<>c__DisplayClass1.<Create>b__0(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object oldValue, Object newValue)
   at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation)
   at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value, Boolean allowReadOnlySet)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.RestoreItemValue(DependencyObject container, DependencyProperty property, Object item)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.RestoreGroupPropeprties(GridViewGroupRow groupRow)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.PrepareContainerForGroupItemOverride(DependencyObject element, Object item)
   at Telerik.Windows.Controls.GridView.BaseItemsControl.Telerik.Windows.Controls.GridView.IGeneratorHost.PrepareItemContainer(DependencyObject container, Object item)
   at Telerik.Windows.Controls.GridView.GridViewItemContainerGenerator.System.Windows.Controls.Primitives.IItemContainerGenerator.PrepareItemContainer(DependencyObject container)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.InsertContainer(Int32 childIndex, UIElement container, Boolean isRecycled)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.AddContainerFromGenerator(Int32 childIndex, UIElement child, Boolean newlyRealized)
   at Telerik.Windows.Controls.GridView.GridViewVirtualizingPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single inHeight, Single& outWidth, Single& outHeight)

I think there's something wrong with your RadGridView when group by 1 property that not show in columns of gridview. This problem not always show. Can you examine it?

[Vlad]

Hello,

 Can you post more info about the grid version? 

All the best,
Vlad
the Telerik team