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,IDictionary
2 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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