public ActionResult xoa_HT1(int?id)
        {
            HOTRO hotro = db.HOTROes.SingleOrDefault(s => s.MA_HT == id);

            db.HOTROes.Remove(hotro);
            db.SaveChanges();
            return(RedirectToAction("ListHT"));
        }
        public ActionResult them_HT(HOTRO ht, FormCollection form)
        {
            if (!ModelState.IsValid)
            {
                return(View(ht));
            }

            db.HOTROes.Add(ht);
            db.SaveChanges();
            return(RedirectToAction("Index"));
        }
 public ActionResult EditTTHT(string id)
 {
     try
     {
         int   idInt = Convert.ToInt32(id);
         HOTRO hotro = db.HOTROes.SingleOrDefault(ht => ht.MA_HT == idInt);
         if (hotro.MA_TT_HT == "01")
         {
             hotro.MA_TT_HT = "02";
         }
         else
         {
             hotro.MA_TT_HT = "01";
         }
         db.SaveChanges();
         return(Json(true, JsonRequestBehavior.AllowGet));
     }
     catch (Exception)
     {
         return(null);
     }
 }