public ActionResult Create(CampusViewModel viewModel) { try { string MatchPhonePattern = @"^\(?([0-9]{3})\)?[-.●]?([0-9]{3})[-.●]?([0-9]{4})$"; Regex rx = new Regex(MatchPhonePattern, RegexOptions.Compiled | RegexOptions.IgnoreCase); var validateName = _campusService.GetCampusDuplicate(viewModel.ID, viewModel.Name); if (validateName != null) { ModelState.AddModelError("Name", "Campus Name already exists"); return(View(viewModel)); } else { try { if (!rx.IsMatch(viewModel.Telephone.Trim())) { ModelState.AddModelError("Telephone", "Telephone must numbers"); return(View(viewModel)); } var campus = new Campus() { Name = viewModel.Name.Trim(), Address = viewModel.Address, Telephone = viewModel.Telephone, Active = true }; _campusService.Add(campus); _campusService.SaveChanges(); SetAlert("Add Campus success", "success"); } catch (Exception e) { return(View(viewModel)); } } if (!ModelState.IsValid) { // xy ly loi return(View(viewModel)); } } catch (Exception e) { SetAlert("Add Campus error", "error"); } return(RedirectToAction("Index")); }