public ActionResult Create(SpecialPriceViewModel specialPriceModel)
        {
            if (ModelState.IsValid)
            {
                SpecialPrice sp = new SpecialPrice();
                sp.Id = specialPriceModel.Id;
                sp.Price = specialPriceModel.Price;
                sp.StartDate = specialPriceModel.StartDate;
                sp.EndDate = specialPriceModel.EndDate;
                db.Rooms.Find(specialPriceModel.RoomId).specialPrices.Add(sp);
                db.SaveChanges();
                return RedirectToAction("Detail/" + specialPriceModel.RoomId, "Room");
            }

            return View(specialPriceModel);
        }
 public ActionResult Create(int id)
 {
     SpecialPriceViewModel sp = new SpecialPriceViewModel();
     sp.RoomId = id;
     return View(sp);
 }