C# Show row number in row header of a DataGridView

private void dgvDevice_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)

{

var grid = sender as DataGridView;

var rowIdx = (e.RowIndex + 1).ToString();

var centerFormat = new StringFormat()

{

// right alignment might actually make more sense for numbers

Alignment = StringAlignment.Center,

LineAlignment = StringAlignment.Center

};

var headerBounds = new Rectangle(e.RowBounds.Left, e.RowBounds.Top, grid.RowHeadersWidth, e.RowBounds.Height);

e.Graphics.DrawString(rowIdx, this.Font, SystemBrushes.ControlText, headerBounds, centerFormat);

}