public class MasterRowCanExpandEventArgs : CustomMasterRowEventArgs
Public Class MasterRowCanExpandEventArgs Inherits CustomMasterRowEventArgs
The GridView.MasterRowExpanding and GridView.MasterRowCollapsing events fire when attempting to expand or collapse a master row. MasterRowCanExpandEventArgs class properties allow you to identify the master row whose expanded state is about to be changed and the relation index specifying which detail's visible state is affected. You can analyze these values to specify whether the action is allowed. To prohibit changing the master row's expanding state, set the MasterRowCanExpandEventArgs.Allow property to false.