public ActionResult Add(UpdateCityModel model, int id = 0)
        {
            if (ModelState.IsValid)
            {
                var r = YunClient.Instance.Execute(new AddCityRequest
                {
                    Ext = model.Ext,
                    Name = model.Name,
                    ParentId = model.ParentId,
                    Sort = model.Sort,
                    State = model.State
                }, Token);

                if (r.Result > 0)
                {
                    TempData["success"] = "已成功添加";
                    return RedirectToAction("Index");
                }

                TempData["error"] = "添加失败,错误代码:"+r.ErrMsg;
            }

            return View(model);
        }
        public ActionResult Update(int id, UpdateCityModel model)
        {
            if (ModelState.IsValid)
            {
                var r = YunClient.Instance.Execute(new UpdateCityRequest
                {
                    Ext = model.Ext,
                    Id = id,
                    Name = model.Name,
                    Sort = model.Sort,
                    State = model.State
                }, Token);

                if (r.Result)
                {
                    TempData["success"] = "已成功修改";
                    return RedirectToAction("Index");
                }

                TempData["error"] = "添加失败,错误代码:" + r.ErrMsg;
            }

            return View(model);
        }