public ActionResult Edit([Bind(Include = "Id,OrderDate,ReceptionDate,ReturnDate,UserId,BookId")] Order order) { if (ModelState.IsValid) { try { _repo.Actualize(order); _repo.SaveChanges(); } catch { ViewBag.Error = true; return(View(order)); } } ViewBag.BookId = new SelectList(_context.Book, "Id", "Title", order.BookId); ViewBag.UserId = new SelectList(_context.User, "Id", "Email", order.UserId); ViewBag.Error = false; return(View(order)); }