public ActionResult ConfirmTicketPurchase(Guid id) { var ticket = db.TrainTickets.Find(id); if (ticket == null || ticket.UserId.ToString() != User.Identity.GetUserId()) { return(new HttpStatusCodeResult(404)); } if (ticket.IsConfirmed) { ViewBag.IsAlreadyConfirmed = true; ViewBag.IsConfirmed = false; return(View("PurchaseConfirmed")); } // confirm the ticket and update it ticket.IsConfirmed = true; db.TrainTickets.Attach(ticket); var entry = db.Entry(ticket); entry.Property(e => e.IsConfirmed).IsModified = true; db.SaveChanges(); ViewBag.IsConfirmed = true; return(View("PurchaseConfirmed")); }