private void dtgworkingdays_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
this.FillRecordNo();
}
private void FillRecordNo()
{
for (int i = 0; i < this.dtworkingdays.Rows.Count; i++)
{
this.dtgworkingdays.Rows[i].HeaderCell.Value = (i + 1).ToString();
}
}