Delphi cxGrid加行号

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

uses cxLookAndFeelPainters; 

procedure SetRowNumber(var ASender: TcxGridTableView; AViewInfo: TcxCustomGridIndicatorItemViewInfo;
  var ACanvas: TcxCanvas; var ADone: boolean);
var
  AIndicatorViewInfo: TcxGridIndicatorRowItemViewInfo;
  ATextRect: TRect;
  AFont: TFont;
  AFontTextColor, AColor: TColor;
begin
  AFont := ACanvas.Font;
  AColor := clBtnFace;
  AFontTextColor := clWindowText ;
if (AViewInfo is TcxGridIndicatorHeaderItemViewInfo) then begin
  ATextRect := AViewInfo.Bounds;
  InflateRect(ATextRect, -, -); 

   ASender.LookAndFeelPainter.DrawHeader(ACanvas, AViewInfo.Bounds,
    ATextRect, [], cxBordersAll, cxbsNormal, taCenter, 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, -, -);
  ASender.LookAndFeelPainter.DrawHeader(ACanvas, AViewInfo.ContentBounds,
    ATextRect, [], [bBottom, bLeft, bRight], cxbsNormal, taCenter, vaCenter,
    False, False, IntToStr(AIndicatorViewInfo.GridRecord.Index + ),
    AFont, AFontTextColor, AColor);
  ADone := True;
ASender.LookAndFeelPainter.DrawIndicatorImage(ACanvas, ATextRect, AIndicatorViewInfo.IndicatorKind);
end;

如果你不要行标志的话,你可以不改控件 
直接注释掉这一行: ASender.LookAndFeelPainter.DrawIndicatorImage(ACanvas, ATextRect, AIndicatorViewInfo.IndicatorKind); 
要标志的话,在DrawIndicatorImage 从这里跟进去(Ctrl+左键单击) 
在 cxLookAndFeelPainters 单元中作如下修改:

class procedure TcxCustomLookAndFeelPainter.DrawIndicatorImage(ACanvas: TcxCanvas;
  const R: TRect; AKind: TcxIndicatorKind);
var
  X, Y: Integer;
begin
  if AKind = ikNone then Exit;
  with cxIndicatorImages, R do
  begin
    X := (Left + Right - Width);              //靠右
    Y := (Top + Bottom - Height) div ;       //居中
  end;
  cxIndicatorImages.Draw(ACanvas.Canvas, X, Y, Ord(AKind) - );
end;

注意,我已注明靠右的那一行, 就是去掉 DIV 2 了, 
还要改一个地方: 
SKIN控件目录下的dxSkinLookAndFeelPainter单元,找到 
TdxSkinLookAndFeelPainter.DrawIndicatorImage 函数 
的 
OffsetRect(ARect, (Left + Right - cx div 2) , (Top + Bottom - cy) div 2); 
这一行,将 (Left + Right - cx div 2) 改为(Left + Right - cx) 也是去掉 div 2 就是靠右; 
修改后: OffsetRect(ARect, (Left + Right - cx) , (Top + Bottom - cy) div 2);

使用

 procedure TForm1.cxGrid1DBTableView1CustomDrawIndicatorCell(
   Sender: TcxGridTableView; ACanvas: TcxCanvas;
   AViewInfo: TcxCustomGridIndicatorItemViewInfo; var ADone: Boolean);
 begin
      SetRowNumber(Sender,AviewInfo,ACanvas,ADone);
 end; 

另外序号列的列宽最好改为35!

效果图: