Question

当我尝试在服务器上部署我的项目时，我开始得到跟随错误。这对我来说是莫名其妙的行为，因为我在本地计算机和服务器之间做了类似的操作。

[NullReferenceException：对象引用未设置为对象的实例。] MyProject.Models.ViewModels.CashboxViewModel..ctor（Cashbox entity）+168 MyProject.Controllers.CashboxController.Index（Nullable 1 id) +194 lambda_method(Closure , ControllerBase , Object[] ) +150 System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary 2个参数）+241 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod（ControllerContext controllerContext，ActionDescriptor actionDescriptor，IDictionary 2 parameters) +38 System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +11 System.Web.Mvc.Async.WrappedAsyncResult 2.CallEndDelegate（IAsyncResult asyncResult）+138 System.Web.Mvc.Async.AsyncInvocationWithFilters.b__3d（）+111 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass46.b__3f（）+ 452 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass33.b__32（IAsyncResult asyncResult）+15 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass2b.b__1c（）+37 System.Web.Mvc.Async。＆lt;＆gt; c__DisplayClass21.b__1e（IAsyncResult asyncResult）+241 System.Web.Mvc.Controller.b__1d（IAsyncResult asyncResult，ExecuteCoreState innerState）+29 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate(IAsyncResult asyncResult) +111 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +53 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult asyncResult）+19 System.Web.Mvc.MvcHandler.b__5（IAsyncResult asyncResult，ProcessRequestState innerState）+51 System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate（IAsyncResult asyncResult）+111 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+606 System.Web.HttpApplication.ExecuteStep（IExecutionStep step，Boolean＆amp; completedSynchronously）+288

控制器

[HttpGet]
public ActionResult Index(Guid? id)
{
    Cashbox obj = null;
    if (id != null)
    {
        obj = service.GetById(id.Value);
    }

    var model = (TempData[SESSION_KEYS.Transfer] as CashboxViewModel) ?? new CashboxViewModel(obj);
    SetReferenceList(model);

    return View(model);
}

    public BaseViewModel(TEntity obj)
    {
        Set(obj);
    }

    protected void Set(TEntity obj, params string[] constrains)
    {
        if (obj != null)
        {
            foreach (var info in obj.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public).Where(x => x.CanRead))
            {
                if (constrains.Contains(info.Name))
                {
                    continue;
                }

                var piDest = this.GetType().GetProperty(info.Name);
                if (piDest != null && piDest.CanWrite)
                {
                    piDest.SetValue(this, info.GetValue(obj));
                }
            }
        }
    }

public class CashboxViewModel: BaseViewModel<Cashbox>
{

    public CashboxViewModel()
        : base()
    {

    }

    public CashboxViewModel(Cashbox entity)
        : base(entity)
    {

    }
}

对象引用未设置为对象的实例＃7

0 个答案: