public IActionResult DatHang(string tendangnhap)
        {
            string checktendangnhap = HttpContext.Session.GetString("TenDangNhap");

            if (checktendangnhap != null && checktendangnhap != "")
            {
                TaiKhoan taikhoan = new TaiKhoan();
                taikhoan = taikhoanbus.CheckTaiKhoan(tendangnhap);
                List <GioHang>     list         = giohangbus.GetGioHangs(tendangnhap);
                List <TaiKhoan>    listmerchant = giohangbus.GetMerchants(tendangnhap);
                List <DiaChi>      listaddress  = taikhoanbus.GetAllAddress(tendangnhap);
                DiaChi             firstAddress = taikhoanbus.GetFirstAddress(tendangnhap);
                List <HangSanPham> hang         = hangsanphambus.GetHangSanPhams();

                ViewBag.Hang         = hang;
                ViewBag.TaiKhoan     = taikhoan;
                ViewBag.Merchants    = listmerchant;
                ViewBag.FirstAddress = firstAddress;
                ViewBag.ListAddress  = listaddress;

                return(View(list));
            }
            return(RedirectToAction("Index", "Home"));
        }