public ActionResult Create(OrderModel order)
 {
     try
     {
         if (ModelState.IsValid)
         {
             //DbContext.Orders.Add(order);
             //if (DbContext.SaveChanges() > 0)
             //    return Redirect(null);
             //ModelState.AddModelError("", "Đã có lỗi xảy ra. Vui lòng thử lại sau.");
         }
     }
     catch (Exception ex)
     {
         ModelState.AddModelError("", ex.Message);
         ex.Write(LogPath);
     }
     InitFormData(order);
     return View(order);
 }
 public ActionResult Create()
 {
     var model = new OrderModel() { SaleDate = DateTime.Now.ToString("dd/MM/yyyy") };
     InitFormData(model);
     return View(model);
 }
        private void InitFormData(OrderModel order)
        {
            var customers = DbContext.Customers.Select(x => new { CustomerId = x.CustomerId, FullName = x.CustomerId + " - " + x.FullName }).ToList();
            order.Customers = new SelectList(customers, "CustomerId", "FullName", order.CustomerId);
            var methods = new[]
            {
                new { value = "1", text = "Thanh toán trực tiếp"},
                new { value = "2", text = "Thanh toán nợ"}

            };
            order.MethodofPayments = new SelectList(methods, "value", "text", order.MethodofPayment);
            var product = DbContext.Products.Select(x => new { ProductId = x.ProductId + "-" + x.PriceA + "-" + x.PriceB, ProductText = x.ProductId + " - " + x.ProductName }).ToList();
            order.Products = new SelectList(product, "ProductId", "ProductText", null);
        }