非静态方法需要一个目标 [英] Non-static method requires a target

问题描述

我有一个控制器动作，在本地和生产中都可以在Firefox上工作，而IE本地工作，而不是在生产中的IE。这是我的控制器操作：

I have a controller action that works fine on Firefox both locally and in production, and IE locally, but not IE in production. Here is my controller action:

 public ActionResult MNPurchase()
        {
            CalculationViewModel calculationViewModel = (CalculationViewModel)TempData["calculationViewModel"];

            decimal OP = landTitleUnitOfWork.Sales.Find()
                                            .Where(x => x.Min >= calculationViewModel.SalesPrice)
                                            .FirstOrDefault()
                                            .OP;

            decimal MP = landTitleUnitOfWork.Sales.Find()
                                            .Where(x => x.Min >= calculationViewModel.MortgageAmount)
                                            .FirstOrDefault()
                                            .MP;

            calculationViewModel.LoanAmount = (OP + 100) - MP;
            calculationViewModel.LendersTitleInsurance = (calculationViewModel.LoanAmount + 850);


            return View(calculationViewModel);
        }

这是IE中得到的堆栈跟踪：

Here is the stack trace I get in IE:

错误。
处理您的请求时发生错误。
System.Reflection.TargetException：非静态方法需要一个目标。在
System.Reflection.RuntimeMethodInfo.CheckConsistency（Object target）at
System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck（Object obj，BindingFlags
invokeAttr，Binder binder，Object []参数，CultureInfo文化）在
System.Reflection.RuntimeMethodInfo.Invoke（Object obj，BindingFlags invokeAttr，Binder
binder，Object []参数，CultureInfo文化）在
System.Reflection.RuntimePropertyInfo.GetValue（Object obj，对象[]索引）在
System.Data.Objects.ELinq.QueryParameterExpression.TryGetFieldOrPropertyValue（MemberExpression me，Object instance，Object& memberValue）at
System.Data.Objects.ELinq.QueryParameterExpression.TryEvaluatePath（Expression表达式，ConstantExpression& constantExpression）在
System.Data.Objects.ELinq.QueryParameterExpression.EvaluateParameter（Object [] arguments）
在System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan（Nullable 1 forMergeOption）
at System.Data.Objects.ObjectQuery 1.
的系统结果（Nullable 1 forMergeOption）System.Data.Objects.ObjectQuery 1.系统.Collections.Generic.IEnumerable.GetEnumerator（）
在System.Linq.Enumerable.FirstOrDefault [TSource]（IEnumerable 1源）
System.Linq.Queryable.FirstOrDefault [TSource ]（code $ 1 $）
LandTitle.Controllers.HomeController.MNRefi（）在lambda_method（Closure，ControllerBase，
Object []）在System.Web.Mvc.ReflectedActionDescriptor在
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod（ControllerContext
controllerContext，ActionDescriptor actionDescriptor，IDictionary controllerContext，IDictionary 2参数） $ c> 2参数）
Castle.Proxies.Invocations.ControllerActionInvoker_InvokeActionMethod.InvokeMethodOnTarget（）在Castle.DynamicProxy.AbstractInvocation.Proceed（）在
Glimpse.Mvc3.Interceptor.InvokeActionMethodIn terrant.Intercept（IInvocation调用）在Castle.DynamicProxy.AbstractInvocation.Proceed（）在
Castle.Proxies.AsyncControllerActionInvokerProxy.InvokeActionMethod（ControllerContext controllerContext，ActionDescriptor actionDescriptor，IDictionary`2参数）在
System.Web。 Mvc.Async.AsyncControllerActionInvoker。c__DisplayClass37。c__DisplayClass39.b__33（）at
System.Web.Mvc.Async.AsyncControllerActionInvoker。<> c__DisplayClass4f.b__49（）at
System.Web在System.Web上的
System.Web.Mvc.Async.AsyncControllerActionInvoker。c__DisplayClass25。c__DisplayClass2a.b__20（）中的.Mvc.Async.AsyncControllerActionInvoker。c__DisplayClass37.b__36（IAsyncResult asyncResult）。 Mvc.Async.AsyncControllerActionInvoker。c__DisplayClass25.b__22（IAsyncResult asyncResult）

Error. An error occurred while processing your request. System.Reflection.TargetException: Non-static method requires a target. at System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target) at System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index) at System.Data.Objects.ELinq.QueryParameterExpression.TryGetFieldOrPropertyValue(MemberExpression me, Object instance, Object& memberValue) at System.Data.Objects.ELinq.QueryParameterExpression.TryEvaluatePath(Expression expression, ConstantExpression& constantExpression) at System.Data.Objects.ELinq.QueryParameterExpression.EvaluateParameter(Object[] arguments) at System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable1 forMergeOption) at System.Data.Objects.ObjectQuery1.GetResults(Nullable1 forMergeOption) at System.Data.Objects.ObjectQuery1.System.Collections.Generic.IEnumerable.GetEnumerator() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source) at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable1 source) at LandTitle.Controllers.HomeController.MNRefi() at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 parameters) at Castle.Proxies.Invocations.ControllerActionInvoker_InvokeActionMethod.InvokeMethodOnTarget() at Castle.DynamicProxy.AbstractInvocation.Proceed() at Glimpse.Mvc3.Interceptor.InvokeActionMethodInterceptor.Intercept(IInvocation invocation) at Castle.DynamicProxy.AbstractInvocation.Proceed() at Castle.Proxies.AsyncControllerActionInvokerProxy.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<>c__DisplayClass39.b__33() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.b__49() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.b__36(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.b__20() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.b__22(IAsyncResult asyncResult)

推荐答案

我认为这个混乱的异常会发生在使用lambda的变量，这是在run-t的空引用我。在你的情况下，我会检查你的变量calculateViewModel是一个空引用。

I think this confusing exception occurs when you use a variable in a lambda which is a null-reference at run-time. In your case, I would check if your variable calculationViewModel is a null-reference.

这样的东西：

public ActionResult MNPurchase() {
    CalculationViewModel calculationViewModel = (CalculationViewModel)TempData["calculationViewModel"];

    if (calculationViewModel != null) {
        decimal OP = landTitleUnitOfWork.Sales.Find()
                                        .Where(x => x.Min >= calculationViewModel.SalesPrice)
                                        .FirstOrDefault()
                                        .OP;

        decimal MP = landTitleUnitOfWork.Sales.Find()
                                        .Where(x => x.Min >= calculationViewModel.MortgageAmount)
                                        .FirstOrDefault()
                                        .MP;

        calculationViewModel.LoanAmount = (OP + 100) - MP;
        calculationViewModel.LendersTitleInsurance = (calculationViewModel.LoanAmount + 850);


        return View(calculationViewModel);
    } else {
        // Do something else...
    }
}

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