public ActionResult GetCity()
 {
     CityData cd = new CityData();
     List<City> list = new List<City>();
     Dictionary<string, object> dic = new Dictionary<string, object>();
     foreach (var i in cd.Get().ToList())
     {
         list.Add(new City()
         {
             num = i.num,
             cityName = i.cityName
         });
     }
     dic.Add("list", list);
     return Json(dic);
 }