public void Insert_bill(Button bt, ListView lv, ComboBox cb, NumericUpDown nb, TextBox tx)
{
DAL_HOADON hd = new DAL_HOADON();
DAL_THONGTINHOADON tt = new DAL_THONGTINHOADON();
BAL_BAN ban = new BAL_BAN();
BEL_BAN tb = lv.Tag as BEL_BAN;
hd.Insert_Bill(tb.Soban);
int idBill = hd.GetBill(tb.Soban);
int idFood = (cb.SelectedItem as BEL_NUOC).Manuoc;
int count = (int)nb.Value;
if (idBill == -1)
{
hd.Insert_Bill(idBill);
tt.InsertBillInfo(hd.getMaxID(), idFood, count);
}
else
{
tt.InsertBillInfo(idBill, idFood, count);
}
ban.get_lv(lv, tx);
ban.showBill(tb.Soban);
}