public ActionResult EditClass(string id) // xóa lớp { if (!user.IsAdmin()) { return(View("Error")); } int id_class = Convert.ToInt32(id); try { @class cl = Model.GetClass(id_class); Model.UpdateLastSeen("Sửa Lớp " + cl.class_name, Url.Action("EditClass/" + id)); ViewBag.ListSpecialities = Model.GetSpecialities(); ViewBag.ListGrades = Model.GetGrades(); return(View(cl)); } catch (Exception) { return(View("Error")); } }