public PMCT_HDDV(IMHoaDonDV x)
{
view = x;
model = new MMCT_HoaDonDV();
modelhang = new MMHang();
}
public PMHoaDonDV(IMHoaDonDV x)
{
view = x;
model = new MMHOADONDV();
modelphong = new MMPhong();
}