非静态方法需要目标

我有一个控制器操作,该操作在Firefox本地和生产环境中以及本地IE上均能正常运行,但在生产环境中却无法正常运行。这是我的控制器动作:

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);

}

这是我在IE中获得的堆栈跟踪:

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)在System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object

obj,BindingFlags invokeAttr,活页夹活页夹,Object

[]参数,CultureInfo文化)在System.Reflection.RuntimeMethodInfo.Invoke(Object obj,

BindingFlags invokeAttr,活页夹活页夹,Object

[]参数,CultureInfo文化),位于System.Reflection.RuntimePropertyInfo.GetValue(Object

obj,Object

[]索引),位于System.Data.Objects.ELinq.QueryParameterExpression.TryGetFieldOrPropertyValue(MemberExpression我,对象实例,

System.Data.Objects.ELinq.QueryParameterExpression.TryEvaluatePath(Expression

expression,1 forMergeOption) at

System.Data.Objects.ObjectQuery1.GetResults(可空1 forMergeOption) at

System.Data.Objects.ObjectQuery1.System.Collections.Generic.IEnumerable.GetEnumerator()在System.Linq.Enumerable.FirstOrDefault

[TSource](IEnumerable的1 source) at

System.Linq.Queryable.FirstOrDefault[TSource](IQueryable1源)在LandTitle.Controllers.HomeController.MNRefi()在lambda_method(封闭,ControllerBase

,Object

[]),位于System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext

controllerContext,IDictionary2 parameters) at

System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext

controllerContext, ActionDescriptor actionDescriptor,

IDictionary2个参数)在Castle.Proxies.Invocations.ControllerActionInvoker_InvokeActionMethod.InvokeMethodOnTarget()在Castle.DynamicProxy.AbstractInvocation.Proceed()在Glimpse.Mvc3.Interceptor.InvokeActionMethodInterceptor.Intercept(IInvocation调用)在Castle.DynamicProxy.AbstractInvocationed()

Castle.Proxies.AsyncControllerActionInvokerProxy.InvokeActionMethod(ControllerContext

controllerContext,ActionDescriptor actionDescriptor,IDictionary``2个参数)at

System.Web.Mvc.Async.AsyncControllerActionInvoker。<> c__DisplayClass37。<>

c__DisplayClass39.b__33()at System.Web.Mvc.Async

System.Web.Mvc.Async.AsyncControllerActionInvoker的<>

c__DisplayClass4f.b__49().System.Web.Mvc.Async的<>

c__DisplayClass37.b__36(IAsyncResult

asyncResult)。AsyncControllerActionInvoker。<> c__DisplayClass25。<>

c__DisplayClass2a.b__20()在System.Web.Mvc.Async.AsyncControllerActionInvoker。<>

c__DisplayClass25.b__22(IAsyncResult asyncResult)

回答:

我认为当您在运行时为空引用的lambda中使用变量时,会发生此令人困惑的异常。在您的情况下,我将检查您的变量CalculationViewModel是否为空引用。

就像是:

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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