'宣言 Protected Overridable Sub OnDataSourceChanged( _ ByVal newDataSource As Infragistics.Olap.IOlapViewModel, _ ByVal oldDataSource As Infragistics.Olap.IOlapViewModel _ )
protected virtual void OnDataSourceChanged( Infragistics.Olap.IOlapViewModel newDataSource, Infragistics.Olap.IOlapViewModel oldDataSource )