cxGrid 显示行号及行号列列名

cxGrid默认不显示行号，但是可以通过cxGrid1DBTableView1CustomDrawIndicatorCell事件来重绘行号

选中cxGrid1DBTableView1，在OnCustomDrawIndicatorCell事件中，输入以下代码：

procedure TForm1.cxGrid1DBTableView1CustomDrawIndicatorCell(
  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;

SetRowNumber函数声明（注意函数声明的摆放位置，此处不在Form内）：

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

SetRowNumber函数实现代码：

procedure 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;

最后将cxGrid1DBTableView1中的OptionView中的Indicator设为True， IndicatorWidth设为适合值即可。