CXGRID 增加序号列

private
procedure SetRowNumber(var Sender: TcxGridTableView; var AViewInfo: TcxCustomGridIndicatorItemViewInfo; ACanvas: TcxCanvas; var ADone: boolean);

procedure TfrmMain.SetRowNumber(var Sender: TcxGridTableView; var AViewInfo: TcxCustomGridIndicatorItemViewInfo; ACanvas: TcxCanvas; var ADone: boolean);
var
  AIndicatorViewInfo: TcxGridIndicatorRowItemViewInfo;
  ATextRect: TRect;
  AFont: TFont;
  AFontTextColor, AColor: TColor;

  procedure DrawIndicatorImage(ACanvas: TcxCanvas; const R: TRect; AKind: TcxIndicatorKind);
  var
    X, Y: Integer;
  begin
    if AKind = ikNone then
      Exit;
    X := (R.Left + R.Right - cxLookAndFeelPainters.cxIndicatorImages.Width);
    Y := (R.Top + R.Bottom - cxLookAndFeelPainters.cxIndicatorImages.Height) div 2;
    cxLookAndFeelPainters.cxIndicatorImages.Draw(ACanvas.Canvas, X, Y, Ord(AKind) - 1);
  end;

begin
  try
    AFont := ACanvas.Font;
    AColor := clBtnFace;
    AFontTextColor := clWindowText;
    if (AViewInfo is TcxGridIndicatorHeaderItemViewInfo) then
    begin
      ATextRect := AViewInfo.Bounds;
      InflateRect(ATextRect, -1, -1);
      Sender.LookAndFeelPainter.DrawHeader(ACanvas, AViewInfo.Bounds,
        ATextRect, [], cxBordersAll, cxbsNormal, taCenter, TcxAlignmentVert.vaCenter,
        False, False, '序号', AFont, AFontTextColor, AColor);
      ADone := True;
    end;
    if not (AViewInfo is TcxGridIndicatorRowItemViewInfo) then
      Exit;
    ATextRect := AViewInfo.ContentBounds;
    AIndicatorViewInfo := AViewInfo as TcxGridIndicatorRowItemViewInfo;
    InflateRect(ATextRect, -1, -1);
    if Sender.DataController.RecordCount > 0 then
    begin
      if AIndicatorViewInfo.GridRecord.Selected then
        AFontTextColor := clRed
      else
        AFontTextColor := clWindowText;
    end;
    Sender.LookAndFeelPainter.DrawHeader(ACanvas, AViewInfo.ContentBounds,
      ATextRect, [], [bBottom, bLeft, bRight], cxbsNormal, taCenter, TcxAlignmentVert.vaCenter,
      False, False, IntToStr(AIndicatorViewInfo.GridRecord.Index + 1),
      AFont, AFontTextColor, AColor);
    ADone := True;
  except
  end;
  DrawIndicatorImage(ACanvas, ATextRect, AIndicatorViewInfo.IndicatorKind);
end;

procedure TfrmMain.cxGridPlanBOMDBTableView1CustomDrawIndicatorCell(Sender: TcxGridTableView; ACanvas: TcxCanvas; AViewInfo: TcxCustomGridIndicatorItemViewInfo; var ADone: Boolean);
begin
  SetRowNumber(Sender, AViewInfo, ACanvas, ADone); //调用SetRowNumber函数，函数声明及实现见后
end;

效果图：