【回転】c#winform datagridview Rowhead自己成長番号を追加

       private void dgvData_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
        {
            //    ，     
            Rectangle rectangle = new Rectangle(e.RowBounds.Location.X, e.RowBounds.Location.Y, dgvData.RowHeadersWidth - 4, e.RowBounds.Height);
            TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(), dgvData.RowHeadersDefaultCellStyle.Font, rectangle, dgvData.RowHeadersDefaultCellStyle.ForeColor, TextFormatFlags.VerticalCenter | TextFormatFlags.Right);
        }