public ActionResult ThemCongTrinh(CongTrinhViewModel obj)
        {
            if (SessionHandler.User == null)
            {
                return(RedirectToAction("Login", "Account"));
            }
            try
            {
                var index     = _db.CongTrinhs.Count() + 1;     //Phai chinh sua
                var congtrinh = new CongTrinh();
                congtrinh.MaCT  = "CT" + index;
                congtrinh.Email = SessionHandler.User.Email;
                congtrinh.TenCT = obj.TenCT;
                congtrinh.MoTa  = obj.MoTa;
                congtrinh.Gia   = 0;

                _db.CongTrinhs.InsertOnSubmit(congtrinh);
                _db.SubmitChanges();
                return(RedirectToAction("Index"));
            }
            catch (Exception)
            {
                return(RedirectToAction("ThemCongTrinh"));
            }
        }
 public JsonResult Post_UpdateCongTrinh(CongTrinhViewModel model)
 {
     if (SessionHandler.User == null)
     {
         return(Json("login"));
     }
     else
     {
         try
         {
             var congtrinh = _db.CongTrinhs.Single(i => i.MaCT.Equals(model.MaCT));
             congtrinh.TenCT = model.TenCT;
             congtrinh.MoTa  = model.MoTa;
             congtrinh.Gia   = model.Gia;
             _db.SubmitChanges();
             return(Json("ok"));
         }
         catch (Exception e)
         {
             return(Json("error"));
         }
     }
 }