public GioHangViewModels(int ID, string IDLoaiSanPham)
 {
     this.ID            = ID;
     this.IDLoaiSanPham = IDLoaiSanPham;
     if (IDLoaiSanPham == "Phone")
     {
         Phone phone = PhoneBLL.GetSinglePhone(ID, IDLoaiSanPham);
         TenSanPham = phone.TenSanPham;
         HinhAnh    = phone.HinhAnhSanPham;
         DonGia     = phone.GiaSanPham;
     }
     else if (IDLoaiSanPham == "Laptop")
     {
         Laptop laptop = LaptopBLL.GetSingleLaptop(ID, IDLoaiSanPham);
         TenSanPham = laptop.TenSanPham;
         HinhAnh    = laptop.HinhAnhSanPham;
         DonGia     = laptop.GiaSanPham;
     }
     else
     {
         Tablet tablet = TabletBLL.GetSingleTablet(ID, IDLoaiSanPham);
         TenSanPham = tablet.TenSanPham;
         HinhAnh    = tablet.HinhAnhSanPham;
         DonGia     = tablet.GiaSanPham;
     }
 }
        public ViewResult ChiTietPhone(int ID)
        {
            var phone = PhoneBLL.GetSinglePhone(ID);

            if (phone == null)
            {
                Response.StatusCode = 404;
                return(null);
            }
            return(View(phone));
        }
 public ActionResult Details(int ID)
 {
     return(View(PhoneBLL.GetSinglePhone(ID)));
 }