给DataGridView控件画行号

private void dgvxCartCode_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
        {
            this.PointRowNumber((DataGridView)sender, e);
        }

/// <summary>
        /// 给DataGridView控件画行号
        /// </summary>
        /// <param name="dgv"></param>
        /// <param name="e"></param>
        public void PointRowNumber(DataGridView dgv, DataGridViewRowPostPaintEventArgs e)
        {
            Rectangle rectangle = new Rectangle(e.RowBounds.X, e.RowBounds.Y,
                dgv.RowHeadersWidth - 4, e.RowBounds.Height);

            //参数  1.画笔   2.行号   3.字体样式   4.画笔位置   5.字体颜色  6.字体显示位置 
            TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(),
                dgv.RowHeadersDefaultCellStyle.Font, rectangle,
                Color.Green,
                TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter);
        }