cxgrid汇总数是零显示空白

TcxDataSummaryItem.OnGetText

procedure TApportionDeptCost.cxgrdbndtblvwDBBandedTableView1TcxGridDBDataControllerTcxDataSummaryFooterSummaryItems0GetText(
  Sender: TcxDataSummaryItem; const AValue: Variant; AIsFooter: Boolean;
  var AText: string);
begin
  inherited;
  Sender.SummaryItems.Summary.Options := [soNullIgnore];
end;