public ActionResult Update(long idKhachHang) { var tk = Session["TaiKhoan"] as KhachHang; if (tk == null) { return(View("../Login/Index")); } else { if (tk.LoaiTK != "Admin") { return(View("../Home/Index")); } else { var dao = new AdminDAO(); Session["UpdateAd"] = dao.Find(idKhachHang); return(View("Index")); } } }