//hiển thị form sửa thông tin phòng ăn
 public ActionResult formsuaphongan(int id)
 {
     Models.PhongAn x = dc.PhongAns.Find(id);
     if (x != null)
     {
         return(View(x));
     }
     return(RedirectToAction("LstPhongan"));
 }
 public ActionResult actthemphongan(Models.PhongAn pa)
 {
     Models.PhongAn x = dc.PhongAns.Find(pa.phongan_id);
     if (x == null)
     {
         if (pa.phongan_id == 0)
         {
             pa.phongan_id = 1;
             dc.PhongAns.Add(pa);
             dc.SaveChanges();
             return(RedirectToAction("LstPhongan"));
         }
     }
     return(View("formthemphong"));
 }
 public ActionResult actsuaphong(Models.PhongAn pa)
 {
     if (ModelState.IsValid)
     {
         Models.PhongAn x = dc.PhongAns.Find(pa.phongan_id);
         if (x != null)
         {
             x.phongan_id        = pa.phongan_id;
             x.phongan_ten       = pa.phongan_ten;
             x.phongan_mota      = pa.phongan_mota;
             x.phongan_trangthai = pa.phongan_trangthai;
             x.phongan_gia       = pa.phongan_gia;
             x.tongsoban         = pa.tongsoban;
             dc.SaveChanges();
             return(RedirectToAction("LstPhongan"));
         }
     }
     return(View("formthemphong"));
 }