public ActionResult add_loai_xe([Bind(Include = "ten_loai")] loai_xe lx)
 {
     db.Database.ExecuteSqlCommand("insert_loai_xe @ten_loai", new SqlParameter("@ten_loai", lx.ten_loai));
     return(RedirectToAction("danh_sach_loai_xe"));
 }
        public ActionResult edit_loai_xe(string id_loai_xe)
        {
            loai_xe lx = db.loai_xe.FirstOrDefault(m => m.id_loai_xe == id_loai_xe);

            return(View(lx));
        }
 public ActionResult edit_loai_xe([Bind(Include = "ten_loai,id_loai_xe")] loai_xe lx)
 {
     db.Database.ExecuteSqlCommand("edit_loai_xe @id_loai_xe,@ten_loai", new SqlParameter("@id_loai_xe", lx.id_loai_xe), new SqlParameter("@ten_loai", lx.ten_loai));
     db.SaveChanges();
     return(RedirectToAction("danh_sach_loai_xe"));
 }