Automatically generated autonumber in datagarid

This code sample shows how to generate auto number in datagarid at runtime.

public void ItemDataBoundEventHandler(object sender, DataGridItemEventArgs e)
{
	 if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            e.Item.Cells[0].Text = Convert.ToString(e.Item.DataSetIndex + 1);							
}