RowPostPaint Event

In this example the grey column which is present by default on the left side of DataGrid, I have filled it by serial number to sometimes know the number of records entered in the DatGrid..

private void datagrdvwtdsoth_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
        {
            string strRowNumber = (e.RowIndex + 1).ToString();
            while (strRowNumber.Length < datagrdvwtdsoth.RowCount.ToString().Length) strRowNumber = "0" + strRowNumber;
            SizeF size = e.Graphics.MeasureString(strRowNumber, this.Font);
            if (datagrdvwtdsoth.RowHeadersWidth < (int)(size.Width + 20)) datagrdvwtdsoth.RowHeadersWidth = (int)(size.Width + 20);
            Brush b = SystemBrushes.ControlText;
            e.Graphics.DrawString(strRowNumber, this.Font, b, e.RowBounds.Location.X + 15, e.RowBounds.Location.Y + ((e.RowBounds.Height - size.Height) / 2));
        }