public ActionResult Edit(int id, PlaylistEdit model) { if (!ModelState.IsValid) { return(View(model)); } if (model.NewPlaylistID != id) { ModelState.AddModelError("", "ID Mismatch"); return(View(model)); } var service = new PlaylistService(); if (service.EditPlaylist(model)) { TempData["SaveResult"] = "Playlist was updated"; return(RedirectToAction("Index")); } ModelState.AddModelError("", "Playlist could not be updated"); return(View()); }