Click or drag to resize
RadListElementSelectedIndexChanging Event
This event fires before SelectedIndexChanged and provides a means for cancelling the whole selection operation. Someties this event will not fire since cancelling the change is not possible, for example when the DataSource is set to null.

Namespace: Telerik.WinControls.UI
Assembly: Telerik.WinControls.UI (in Telerik.WinControls.UI.dll) Version: 2017.2.613.40 (2017.2.613.40)
Syntax
public event PositionChangingEventHandler SelectedIndexChanging

Value

Type: Telerik.WinControls.UI.DataPositionChangingEventHandler
See Also