public ActionResult AddQuestion(int id) { if (!user.IsManager()) { return(View("Error")); } TestQuestion check = db.TestQuestions.FirstOrDefault(c => c.TestCode == id); if (check == null) { // Model.UpdateLastSeen("Xóa Sinh Viên", Url.Action("DeleteStudent")); int id_student = id; int del = managerDal.AddQFT(id_student); TempData["CandidateID"] = true; TempData["statusAQ"] = "Add questions successfull!!!!"; return(RedirectToAction("TestCode")); } else { TempData["CandidateID"] = false; TempData["statusAQ"] = "This test already had questions"; return(RedirectToAction("TestCode")); } }