无法将linq查询输出转换为.net中的json数据

Question

我希望得到温度列的5个前10个记录，并希望转换为json数据。我试过这样但没有得到理想的值

{＆＃34;成功＆＃34;：真，＆＃34; sensorsdata＆＃34; {＆＃34; WaterTemperature＆＃34;：＆＃34; 33.33＆＃34;}}

  using (smartpondEntities DB = new smartpondEntities())
                {
                    var parkingSlot = DB.ParkingSlots.OrderByDescending(x => x.CurrentTime).Select(x => x.WaterTemperature).Take(5);

                    return Json(new { success = true, sensorsdata = new { WaterTemperature = "33.33" } }, JsonRequestBehavior.AllowGet);
                }