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GridViewRowIsExpandedChanging Event
Occurs when GridViewRow is about to change its IsExpanded state.

Namespace: Telerik.Windows.Controls.GridView
Assembly: Telerik.Windows.Controls.GridView (in Telerik.Windows.Controls.GridView.dll) Version: 2017.3.913.40 (2017.3.913.40)
Syntax
public event EventHandler<CancelRoutedEventArgs> IsExpandedChanging

Value

Type: SystemEventHandlerCancelRoutedEventArgs
See Also