public ActionResult EditQuestion(string id) { if (!user.IsTeacher()) { return(View("Error")); } int id_question = Convert.ToInt32(id); try { question question = Model.GetQuestion(id_question); Model.UpdateLastSeen("Sửa Câu Hỏi " + question.id_question, Url.Action("EditQuestion/" + id)); ViewBag.ListSubject = Model.GetSubjects(); return(View(question)); } catch (Exception) { return(View("Error")); } }