private void dgmain_RowEnter(object sender, DataGridViewCellEventArgs e)
        {
            if (dgmain.Rows[e.RowIndex].IsNewRow == false)
            {
                lst_nozzels.Items.Clear();
                lbl_id.Text = dgmain.Rows[e.RowIndex].Cells[0].Value.ToString().Trim();

                IEnumerable <DaySession> sessions = CustomeRepository.GetDaySessionForDay(commonFunctions.ToInt(lbl_id.Text.Trim()));

                foreach (var item in sessions)
                {
                    ListViewItem itemx = new ListViewItem(item.SessionName, 0);
                    itemx.Tag = item;
                    lst_nozzels.Items.Add(itemx);
                }
            }
        }