private void LvwMonthView_ItemSelectionChanged(object sender, ListViewItemSelectionChangedEventArgs e)
        {
            DataTable    dispatches;
            ListViewItem selectedItem = e.Item;

            ListViewItem.ListViewSubItem subItem = selectedItem.SubItems[3];
            string text  = subItem.Text;
            int    year  = Convert.ToInt32(text.Split('-').ElementAt(0));
            int    month = Convert.ToInt32(text.Split('-').ElementAt(1));

            LvwDetailView.Items.Clear();
            dispatches = selectedStaff.QueryLabourHourDetails(year, month, selectedStaff.ID, factory);
            ShowDetailedList(dispatches);
        }