C#----给DataGridView添加行号

private void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
{
try
{
SolidBrush v_SolidBrush = new SolidBrush(dataGridView1.RowHeadersDefaultCellStyle.ForeColor);
int v_LineNo = 0;
v_LineNo = e.RowIndex + 1;
string v_Line = v_LineNo.ToString();
e.Graphics.DrawString(v_Line, e.InheritedRowStyle.Font, v_SolidBrush, e.RowBounds.Location.X + 15, e.RowBounds.Location.Y + 5);
}
catch (Exception ex)
{
MessageBox.Show("添加行号时发生错误，错误信息：" + ex.Message, "操作失败");
}
}