JsonResult序列化并保存json文件 以及对json文件读取反序列

/// <summary>
        /// 用户列表
        /// </summary>
        /// <returns></returns>
        public ActionResult UserList()
        {
            //页面加载时，将微信拉去用户进行缓存
            List<wx_user_info> Users = new List<wx_user_info>();
            var OpenList = new WeChat().GetOpenIdList();
            if (OpenList.ResponseState)
            {
                foreach (var item in OpenList.ResponseData.data.openid)
                {
                    var backdata = new WeChat().GetUserInfo(item);
                    if (backdata.ResponseState)
                    {
                        Users.Add(backdata.ResponseData);
                    }
                }
                var jser = new JavaScriptSerializer();
                var json = jser.Serialize(Users.ToArray());
                string sRespons = json.ToString();

                byte[] byt = System.Text.Encoding.UTF8.GetBytes(sRespons);
                FileStream fs = new FileStream(Server.MapPath("~/App_Data/Config/weixin.json"), FileMode.OpenOrCreate);
                fs.Write(byt, 0, byt.Length);
                fs.Dispose();
                fs.Close();
            }
            else
            {
                ViewBag.Tip = "系统异常,编号：" + OpenList.ErrorData.errcode + "错误信息：" + OpenList.ErrorData.errmsg;
            }
            return View();
        }

public ActionResult GetUserList(int? page, int? take)
        {
            page = page ?? 1;
            take = take ?? 5;
          
                List<wx_user_info> Users = new List<wx_user_info>();
                FileStream fs = new FileStream(Server.MapPath("~/App_Data/Config/weixin.json"), FileMode.Open);
                byte[] byt = new byte[fs.Length];
                fs.Read(byt, 0, byt.Length);
                Users = JsonConvert.DeserializeObject<List<wx_user_info>>(Encoding.UTF8.GetString(byt));
                fs.Dispose();
                fs.Close();
                ViewBag.Tip = Users.Count() + "人";

                ViewBag.TotalPage = Math.Ceiling(((double)Users.Count() / (double)take));
                ViewBag.CurrentPage = page;

                var PageUseras = Users.Where(ua => true);
                //条件查询
                if (!string.IsNullOrWhiteSpace(Request.Form["search_nickname"]))
                {
                    PageUseras = Users.Where(ua => ua.nickname.Contains(Request.Form["search_nickname"]) || ua.remark.Contains(Request.Form["search_nickname"]));
                    ViewBag.TotalPage = Math.Ceiling(((double)PageUseras.Count() / (double)take));
                    ViewBag.CurrentPage = page = 1;
                }

            //如果本页没有数据直接显示前一页
            if (page > 1 && PageUseras.Skip(take.Value * (page.Value - 1)).Take(take.Value).Count() < 1)
            {
                ViewBag.CurrentPage = Math.Ceiling(((double)PageUseras.Count() / (double)take));
                PageUseras = PageUseras.Skip(take.Value * (page.Value - 2)).Take(take.Value);
            }
            else
            {
                PageUseras = PageUseras.Skip(take.Value * (page.Value - 1)).Take(take.Value);
            }
            return View(PageUseras);
        }