public async Task <IActionResult> Index()
        {
            ViewBag.Account = HttpContext.Session.GetString("UserName");
            List <ExportBill> cart = new List <ExportBill>();

            if (SessionHelper.GetObjectFromJson <List <ExportBill> >(HttpContext.Session, "Cart") != null)
            {
                cart = SessionHelper.GetObjectFromJson <List <ExportBill> >(HttpContext.Session, "Cart");
                foreach (var item in cart)
                {
                    item.Shoes = await shoesDao.GetObject(item.ShoesId);
                }
                ViewBag.Total = cart.Sum(item => item.Price * item.Quantity);
                ViewBag.Cart  = cart;
            }
            else
            {
                List <Sell> list = await exportBillDao.GetList();

                ViewBag.Cart  = cart;
                ViewBag.Total = 0;
            }
            return(View());
        }
 public async Task <IActionResult> ExportBill()
 {
     return(View(await exportBillDao.GetList()));
 }