datagridview 設置行號（轉載來息互聯網）

可以在DataGridView的RowPostPaint事件中进行绘制。
代碼如下：

 

 

  private void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
        {
            Rectangle rectangle = new Rectangle(e.RowBounds.Location.X,
                e.RowBounds.Location.Y,
                dataGridView1.RowHeadersWidth - 4,
                e.RowBounds.Height);

            TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(), 
                dataGridView1.RowHeadersDefaultCellStyle.Font,
                rectangle,
                dataGridView1.RowHeadersDefaultCellStyle.ForeColor, 
                TextFormatFlags.VerticalCenter | TextFormatFlags.Right);
        }
    }
}