public ActionResult Store()
        {
            if (Request["Code"] == "")
            {
                TempData["Error"] = "کد را وارد کنید";
                return(Redirect("/Admin/DiscountCode/Create"));
            }
            if (Request["Price"] == "")
            {
                TempData["Error"] = "مبلغ را وارد کنید";
                return(Redirect("/Admin/DiscountCode/Create"));
            }
            if (Request["ExpireDate"] == "")
            {
                TempData["Error"] = "تاریخ را وارد کنید";
                return(Redirect("/Admin/DiscountCode/Create"));
            }

            DiscountCode d = new Models.DiscountCode();

            d.Status = true;
            d.Code   = Request["Code"];
            d.Price  = Convert.ToInt32(Request["Price"]);
            string date = Request["ExpireDate"];

            string[]        array = date.Split('/');
            PersianCalendar p     = new PersianCalendar();

            d.ExpireDate = new DateTime(Convert.ToInt32(array[0]), Convert.ToInt32(array[1]), Convert.ToInt32(array[2]), p);
            db.DiscountCode.Add(d);
            db.SaveChanges();
            return(Redirect("/Admin/DiscountCode/Index"));
        }
 public decimal CalculateDiscountAmount(Models.DiscountCode discountCode, decimal totalAmount)
 {
     if (discountCode.IsPercent)
     {
         return(totalAmount * discountCode.Amount / 100);
     }
     else
     {
         return(discountCode.Amount);
     }
 }