public ActionResult CreateRestaurant(Resto restaurant)
 {
     if (ModelState.IsValid)
     {
         using (IDal dal = new Dal())
         {
             if (!dal.RestaurantExiste(restaurant.Nom))
             {
                 dal.CreerRestaurant(restaurant.Nom, restaurant.Telephone);
                 return RedirectToAction("Index");
             }
             else
             {
                 //ViewBag.MessageErreur = "Ce restaurant existe deja !";
                 ModelState.AddModelError("Nom", "Un restaurant existe deja avec ce nom la !");
                 return View();
             }
         }
     }
     else
     {
         ViewBag.MessageErreur = "Valeurs incorrects !";
         return View();
     }
 }
 public ActionResult ModifierRestaurant(Resto resto)
 {
     if (!ModelState.IsValid)
     {
         return View(resto);
     }
     using (IDal dal = new Dal())
     {
         dal.ModifierRestaurant(resto.Id, resto.Nom, resto.Telephone);
         return RedirectToAction("Index");
     }
 }