C#中的datagridview显示行号

private void DGV_DataInfo_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)

{

var dgv = sender as DataGridView;

if (dgv != null)

{

Rectangle rect = new Rectangle(e.RowBounds.Location.X, e.RowBounds.Location.Y, dgv.RowHeadersWidth - 4, e.RowBounds.Height);

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

}

}