this.gridGroupingControl1.TableControlCurrentCellErrorMessage += new Syncfusion.Windows.Forms.Grid.Grouping.GridTableControlCurrentCellErrorMessageEventHandler(gridGroupingControl1_TableControlCurrentCellErrorMessage);
this.gridGroupingControl1.ExceptionRaised += new Syncfusion.Grouping.ExceptionRaisedEventHandler(gridGroupingControl1_ExceptionRaised);
void gridGroupingControl1_ExceptionRaised(object sender, Syncfusion.Grouping.ExceptionRaisedEventArgs e)
{
e.Cancel = true;
}
void gridGroupingControl1_TableControlCurrentCellErrorMessage(object sender, Syncfusion.Windows.Forms.Grid.Grouping.GridTableControlCurrentCellErrorMessageEventArgs e)
{
e.Inner.Cancel = true;
}