public ActionResult Create([Bind(Include = "Id,Stars,HotelName,LocationsId")] Hotel hotel) { if (ModelState.IsValid) { db.Hotels.Add(hotel); db.SaveChanges(); return(RedirectToAction("Index")); } ViewBag.LocationsId = new SelectList(db.Locations, "Id", "Country", hotel.LocationId); return(View(hotel)); }
public void Save() { try { _context.SaveChanges(); } catch (DbEntityValidationException ex) { // Retrieve the error messages as a list of strings. var errorMessages = ex.EntityValidationErrors .SelectMany(x => x.ValidationErrors) .Select(x => x.ErrorMessage); // Join the list to a single string. var fullErrorMessage = string.Join("; ", errorMessages); // Combine the original exception message with the new one. var exceptionMessage = string.Concat(ex.Message, " The validation errors are: ", fullErrorMessage); // Throw a new DbEntityValidationException with the improved exception message. throw new DbEntityValidationException(exceptionMessage, ex.EntityValidationErrors); } }