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是在Firefox本地和生产，以及IE浏览器工作正常，本地，而不是IE浏览器的生产。这是我的控制器操作：

 公众的ActionResult MNPurchase（）
        {
            CalculationViewModel calculationViewModel =（CalculationViewModel）的TempData [calculationViewModel];            小数OP = landTitleUnitOfWork.Sales.Find（）
                                            。凡（X =＆GT; x.Min＆GT; = calculationViewModel.SalesPrice）
                                            .FirstOrDefault（）
                                            .OP;            小数MP = landTitleUnitOfWork.Sales.Find（）
                                            。凡（X =＆GT; x.Min＆GT; = calculationViewModel.MortgageAmount）
                                            .FirstOrDefault（）
                                            .MP;            calculationViewModel.LoanAmount =（OP + 100） -  MP;
            calculationViewModel.LendersTitleInsurance =（calculationViewModel.LoanAmount + 850）;
            返回查看（calculationViewModel）;
        }
 

下面是堆栈跟踪我在IE中得到：

 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（目标对象）的
System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck（obj对象，的BindingFlags
invokeAttr，粘结剂粘合，对象[]参数，CultureInfo的文化）处
System.Reflection.RuntimeMethodInfo.Invoke（obj对象，的BindingFlags invokeAttr，捆扎机
粘合剂，对象[]参数，CultureInfo的文化）处
System.Reflection.RuntimePropertyInfo.GetValue（obj对象，对象[]指数）的
System.Data.Objects.ELinq.QueryParameterEx pression.TryGetFieldOrPropertyValue（MemberEx pression我，对象实例，对象和放大器; memberValue）在
System.Data.Objects.ELinq.QueryParameterEx pression.TryEvaluatePath（前pression前pression，ConstantEx pression＆放大器; constantEx pression）的
System.Data.Objects.ELinq.QueryParameterEx pression.EvaluateParameter（对象[]参数）
在System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan（Nullable`1 forMergeOption）
在System.Data.Objects.ObjectQuery`1.GetResults（Nullable`1 forMergeOption）在
System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable＆LT; T＆GT; .GetEnumerator（）
 在System.Linq.Enumerable.FirstOrDefault [TSource]（IEnumerable`1源）在
System.Linq.Queryable.FirstOrDefault [TSource]（IQueryable`1源）在
LandTitle.Controllers.HomeController.MNRefi（）在lambda_method（封闭，ControllerBase，
 在System.Web.Mvc.ReflectedActionDescriptor.Execute对象[]）（ControllerContext
controllerContext，IDictionary`2参数）在
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod（ControllerContext
controllerContext，ActionDescriptor actionDescriptor，IDictionary`2参数）在
Castle.Proxies.Invocations.ControllerActionInvoker_InvokeActionMethod.InvokeMethodOnTarget（）在Castle.DynamicProxy.AbstractInvocation.Proceed（）在
Glimpse.Mvc3.Interceptor.InvokeActionMethodInterceptor.Intercept（IInvocation调用）在Castle.DynamicProxy.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.<BeginInvokeActionMethodWithFilters>b__33()在
System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49()在
System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult）在
System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.<BeginInvokeAction>b__20()在System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult）
    首页MNRefi
 

解决方案

我认为当你在一个lambda这是在运行时的空引用使用一个变量出现这种混乱异常。在你的情况，我会检查你的变量calculationViewModel是一个空引用。

是这样的：

 公众的ActionResult MNPurchase（）{
    CalculationViewModel calculationViewModel =（CalculationViewModel）的TempData [calculationViewModel];    如果（calculationViewModel！= NULL）{
        小数OP = landTitleUnitOfWork.Sales.Find（）
                                        。凡（X =＆GT; x.Min＆GT; = calculationViewModel.SalesPrice）
                                        .FirstOrDefault（）
                                        .OP;        小数MP = landTitleUnitOfWork.Sales.Find（）
                                        。凡（X =＆GT; x.Min＆GT; = calculationViewModel.MortgageAmount）
                                        .FirstOrDefault（）
                                        .MP;        calculationViewModel.LoanAmount =（OP + 100） -  MP;
        calculationViewModel.LendersTitleInsurance =（calculationViewModel.LoanAmount + 850）;
        返回查看（calculationViewModel）;
    }其他{
        //做别的东西...
    }
}
 

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);
        }

Here is the stack trace I get in IE:

   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(Nullable`1 forMergeOption) 
at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) at 
System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
 at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source) at 
System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source) at 
LandTitle.Controllers.HomeController.MNRefi() at lambda_method(Closure , ControllerBase ,
 Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext 
controllerContext, IDictionary`2 parameters) at 
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext 
controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 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.<BeginInvokeActionMethodWithFilters>b__33() at 
System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() at 
System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) at 
System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.<BeginInvokeAction>b__20() at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult)
    Home MNRefi

解决方案

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.

Something like:

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...
    }
}

这篇关于非静态方法需要一个目标的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！