private void btnDM_Click(object sender, EventArgs e)
{
Button btnDM = sender as Button;
TextBox txt = sender as TextBox;
string MaNuoc = ((sender as Button).Tag as NUOC).MANUOC;
if (hd.KTraNuocTonTai(ma, MaNuoc) == true)
{
hd.ThemNuocVaoHD(ma, MaNuoc, 1, nuoc.GetDonGiaNuoc(MaNuoc));
dgvCTHD.DataSource = hd.GetCTHD(ma);
txtTongTien.Text = hd.TinhTong(ma).ToString();
}
else
{
int sl = hd.GetSL(ma, MaNuoc) + 1;
hd.CapNhatSL(ma, MaNuoc, sl);
dgvCTHD.DataSource = hd.GetCTHD(ma);
txtTongTien.Text = hd.TinhTong(ma).ToString();
}
}