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我在查看时收到错误消息：

The ObjectContext instance has been disposed. ....

我的视图模型类：

public class TruckLUOrderVD
{
    public raTMS_TruckLoadingOrder TruckLoadingOrder { get; set; }
    public List<raTMS_CompartmentLoadingOrder> TruckCompartment { get; set; }      
    public List<raTMS_Tank> TankTruck { get; set; }
    public List<SelectListItem> LTank { get; set; }
    public int LJetty { get; set; }
    public List<raTMS_ShipAgent> Agent { get; set; }

    public List<raTMS_Ship> Ship { get; set; }

    public List<string> service = new List<string> { "Loading", "Unloading"};
    public List<SelectListItem>  modeList { get; set; }

    public List<Boolean> compartmentEnabled { get; set; }

    public string shiptype { get; set; }
    public Boolean multiolder { get; set; }
    public string maxcmp { get; set; }
    public string serviceval { get; set; }

    public string statusname { get; set; }

    public string serviceAutoNumber { get; set; }

    public string[] productnm { get; set; }
}

Finnaly 我有 Ajax 可以从控制器操作中获取 

public JsonResult Getdetail(int id)
{
    raTMS_Tank TANK = new raTMS_Tank();
    raTMS_Ship Ship = new raTMS_Ship();
    raTMS_ShipAgent agent = new raTMS_ShipAgent();
    raTMS_ShipOrder order = new raTMS_ShipOrder();
    raTMS_ShipTankUnloadingOrder stank = new raTMS_ShipTankUnloadingOrder();
    raTMS_TruckLoadingOrder SR = new raTMS_TruckLoadingOrder();

    List<raTMS_TruckLoadingOrder> ListA = new List<raTMS_TruckLoadingOrder>();
    List<raTMS_CompartmentLoadingOrder> ListB = new List<raTMS_CompartmentLoadingOrder>();
    List<raTMS_ShipTankUnloadingOrder> ListC = new List<raTMS_ShipTankUnloadingOrder>();

    TruckLUOrderVD vd = new TruckLUOrderVD();

    using (raTMSEntities2 db = new raTMSEntities2())
    {
        var c = db.raTMS_CompartmentLoadingOrder.Where(x => x.TruckLoadingOrderFK == id).ToList();
        SR = db.raTMS_TruckLoadingOrder.Where(x => x.PriKey == id).FirstOrDefault();

        for (int i = 0; i < SR.raTMS_Truck.CompartmentNumber; i++)
        {
            var c1 = c.Where(x => x.CompartmentNumber == i + 1).FirstOrDefault();
            if (c1 != null)
            {
                ListB.Add(c1);
                ListB[i].OrderPrikey = c1.OrderFK;
                ListB[i].FQTransact = c1.raTMS_Order.TansactQty.GetValueOrDefault();

                ListB[i].AQReserved = c1.raTMS_Order.ReservedQty.GetValueOrDefault();
            }
            else
            {
                ListB.Add(new raTMS_CompartmentLoadingOrder());
            }
        }

        raTMS_Status stat = new raTMS_Status();

        vd.statusname = stat.getStatusName(SR.Status.Value);

        vd.TruckLoadingOrder = SR;
        vd.TruckCompartment = ListB;

        return Json(new { vd = vd }, JsonRequestBehavior.AllowGet);
    }
}

我尝试了一些实体配置，例如 LazyLoading 和 ProxyCreationEnabled。

db.Configuration.LazyLoadingEnabled = false;
db.Configuration.ProxyCreationEnabled = false;

我无法通过 Ajax 获取数据。它可以由不使用 Json 的视图模型类成功返回，我需要在不重新加载页面的情况下运行此操作。我收到类似上述错误消息的错误。我的 Linq 有什么错误吗？

谢谢

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