dataGridView添加行号

private void dgvGoodsInfo_RowPostPaint                              

   (object sender,  DataGridViewRowPostPaintEventArgs e)        

     {  //为数据行加标号               

         using (SolidBrush b = new SolidBrush       

               (dgvGoodsInfo.RowHeadersDefaultCellStyle.ForeColor))

                {                 e.Graphics.DrawString(                    

                    e.RowIndex.ToString(System.Globalization.CultureInfo.CurrentUICulture),                     dgvGoodsInfo.DefaultCellStyle.Font,    

                    b,                     e.RowBounds.Location.X+20,     e.RowBounds.Location.Y+4);            

                  }

         }