dbgrid如何在最左边的列上显示行序号

procedure TForm1.Table1CalcFields(DataSet:   TDataSet);
begin
table1.FieldValues['no']:=table1.RecNo;
end;

//聲明全局變量i
procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject; const Rect: TRect;
  DataCol: Integer; Column: TColumn; State: TGridDrawState);
begin
  with DBGrid1.DataSource.DataSet do
  begin
    if DataCol =  then                           //設置在第一列
    begin
      if state<>dsInsert  then i:= recno;           //這句是關鍵。。。
      DBGrid1.Canvas.TextRect(Rect, Rect.Left + , Rect.Top + , IntToStr(i));
      inc(i);                  //將i加1
    end;
  end;
end; 

procedure TForm1.DataSource1StateChange(Sender: TObject);
begin                                            //狀態改變時將i置為1
  i:=;
end; 

        問題完美解決了，代碼也很簡單，只是加了一個中間變量 i 。
        到目前為為止，網上還未見到此種解決方案，如有雷同，純屬巧合。   

以上方法後來證明還是有點問題，修正如下：
var
  Form1: TForm1;
  i:integer;
  bflag,bflag2:boolean; 

implementation 

{$R *.dfm} 

procedure TForm1.Button1Click(Sender: TObject);
begin
  adoquery1.Open;
end; 

procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject; const Rect: TRect;
  DataCol: Integer; Column: TColumn; State: TGridDrawState);
  var
    rect1:TRect;
    sValue :string;
    ss:boolean;
begin
  if DataCol =  then                           //設置在第一列
  begin
    if DBGrid1.DataSource.DataSet.state<>dsInsert  then
      i:= DBGrid1.DataSource.DataSet.recno; 

    Rect1 := Rect;
    with dbgrid1 do
    begin
      Canvas.Brush.Color := clBtnFace;
      sValue := IntToStr(i);
      Canvas.FillRect(Rect1);
      Canvas.Pen.Width := ;
      Canvas.Pen.Color := clWhite;
      Canvas.MoveTo(Rect1.Left, Rect1.Bottom);
      Canvas.LineTo(Rect1.Left, Rect1.Top);
      Canvas.LineTo(Rect1.right, Rect1.Top);
      Canvas.Pen.Color := clBtnShadow;
      Canvas.LineTo(Rect1.right, Rect1.Bottom - );
      Canvas.LineTo(Rect1.Left, Rect1.Bottom - );
      Rect1.Top := Rect1.Top +;
      if State = [gdSelected, gdFocused] then
      begin
        if bflag=true then
        begin
          sValue:=inttostr(datasource.DataSet.RecordCount +);
          i:=datasource.DataSet.RecordCount +;
            ss:=true;
        end;
      Canvas.Font.Color := clred;
      end
      else
      begin
        Canvas.Font.Color := clgreen;
      end;
      DrawText(Canvas.Handle, PChar(sValue), Length(sValue), Rect1, DT_CENTER);
    end;
    if i<=dbgrid1.DataSource.DataSet.RecordCount then
    begin
      inc(i);
    end
    else
    begin
    if (ss<>true) then
      i:=dbgrid1.DataSource.DataSet.RecordCount+ -TDrawGrid(DBgrid1).RowCount ;
    end;
  end
  else bflag2:=false;
end; 

procedure TForm1.DataSource1StateChange(Sender: TObject);
begin
  if dbgrid1.DataSource.DataSet.State <>dsbrowse then
  begin
    i:=dbgrid1.DataSource.DataSet.RecordCount+ -TDrawGrid(DBgrid1).RowCount ;
    bflag := true;
  end
  else
    bflag:=false;
end; 

procedure TForm1.DBGrid1ColEnter(Sender: TObject);
begin
 if (bflag=true)and (dbgrid1.SelectedField.FieldNo <>) then
 begin
  i:=dbgrid1.DataSource.DataSet.RecordCount+ -TDrawGrid(DBgrid1).RowCount;
  dbgrid1.Refresh;
 end;
end; 

procedure TForm1.DBGrid1ColExit(Sender: TObject);
begin
  if (bflag=true)and (dbgrid1.SelectedField.FieldNo =) then
 begin
  i:=dbgrid1.DataSource.DataSet.RecordCount+;
  dbgrid1.Refresh;
 end;
end; 

end.