MVC，linq，json，有关问题不知道如何描述，跪求

[HttpPost]        public ActionResult UserJson(int? id,int? page, int? rows, string model)        {            int Page = page ?? 1;            int Rows = rows ?? 10;            QueryModel QModel = null;            Dictionary<string, object> JsonObj = new Dictionary<string, object>();            if (!string.IsNullOrWhiteSpace(model))            {                QModel = IntelligentQuery.AjaxQueryConverter.ToQueryModel(model);            }            if (id.HasValue)            {                JsonObj.Add("total", UserRepository.Get(QModel).Where(w => w.Position.OrganID == id).Count());            }            else            {                JsonObj.Add("total", UserRepository.Get(QModel).Count());            }            if (id.HasValue)            {                JsonObj.Add("rows", UserRepository.Get(QModel, orderBy: o => o.OrderBy(u => u.Position.PositionLevel)).Where(w => w.Position.OrganID == id)                    .Skip((Page - 1) * Rows)                    .Take(Rows)                    .Select(s => new { s.UserNo,s.Password, s.RealName, s.Sex, s.Birthday, s.IDCardNumber, s.Height, s.IsDisabled, s.Country, s.DomicilePlace, s.IsMarried, s.PoliticsStatus, s.Education, s.GraduateSchool, s.Degree, s.DegreeBySchool, s.ResidentialAddress, s.Post, s.TelPhoneNumber, s.Email, s.QQ, s.MSN, s.JoinDate, s.PositionID, s.Position.PositionName,s.Position.Organization.OrganID, s.Position.Organization.OrganName, s.State, s.PayType, s.CheckType,s.IsSuper, s.Remark, s.IsEnable }));            }            else            {                JsonObj.Add("rows", UserRepository.Get(QModel, orderBy: o => o.OrderBy(u => u.Position.PositionLevel))                    .Skip((Page - 1) * Rows)                    .Take(Rows)                    .Select(s => new { s.UserNo, s.Password, s.RealName, s.Sex, s.Birthday, s.IDCardNumber, s.Height, s.IsDisabled, s.Country, s.DomicilePlace, s.IsMarried, s.PoliticsStatus, s.Education, s.GraduateSchool, s.Degree, s.DegreeBySchool, s.ResidentialAddress, s.Post, s.TelPhoneNumber, s.Email, s.QQ, s.MSN, s.JoinDate, s.PositionID, s.Position.PositionName, s.Position.Organization.OrganID, s.Position.Organization.OrganName, s.State, s.PayType, s.CheckType, s.IsSuper, s.Remark, s.IsEnable }));            }            Newtonsoft.Json.Converters.IsoDateTimeConverter timeConverter = new Newtonsoft.Json.Converters.IsoDateTimeConverter();//这里使用自定义日期格式，默认是ISO8601格式                     timeConverter.DateTimeFormat = "yyyy-MM-dd";//设置时间格式             string json = Newtonsoft.Json.JsonConvert.SerializeObject(JsonObj, Newtonsoft.Json.Formatting.Indented, timeConverter);//转换序列化的对象            return Content(json, "application/json");        }