Castle.Windsor-HttpContext.Current为null。 PerWebRequestLifestyle只能在ASP.Net中使用-通过异步调用，肯定是从控制器调用的

时间：2019-01-08 11:12:11

标签： asp.net asp.net-mvc castle-windsor

我在Castle.Windsor中使用PerWebRequestLifestyle，并获得：

HttpContext.Current is null. PerWebRequestLifestyle can only be used in ASP.Net

这是一个很长的堆栈跟踪记录，但它确实确实在控制器中启动。异常的堆栈跟踪没有显示该异常，而是显示了从控制器异步调用的命令处理程序。

为什么会这样？

异常堆栈跟踪：

   at Castle.MicroKernel.Lifestyle.PerWebRequestLifestyleModule.GetScope()
   at Castle.MicroKernel.Lifestyle.ScopedLifestyleManager.GetScope(CreationContext context)
   at Castle.MicroKernel.Lifestyle.ScopedLifestyleManager.Resolve(CreationContext context, IReleasePolicy releasePolicy)
   at Castle.MicroKernel.Handlers.DefaultHandler.ResolveCore(CreationContext context, Boolean requiresDecommission, Boolean instanceRequired, Burden& burden)
   at Castle.MicroKernel.Handlers.DefaultHandler.Resolve(CreationContext context, Boolean instanceRequired)
   at Castle.MicroKernel.Resolvers.DefaultDependencyResolver.Resolve(CreationContext context, ISubDependencyResolver contextHandlerResolver, ComponentModel model, DependencyModel dependency)
   at Castle.MicroKernel.ComponentActivator.DefaultComponentActivator.CreateConstructorArguments(ConstructorCandidate constructor, CreationContext context)
   at Castle.MicroKernel.ComponentActivator.DefaultComponentActivator.Instantiate(CreationContext context)
   at Castle.MicroKernel.ComponentActivator.DefaultComponentActivator.InternalCreate(CreationContext context)
   at Castle.MicroKernel.ComponentActivator.AbstractComponentActivator.Create(CreationContext context, Burden burden)
   at Castle.MicroKernel.Lifestyle.AbstractLifestyleManager.CreateInstance(CreationContext context, Boolean trackedExternally)
   at Castle.MicroKernel.Lifestyle.ScopedLifestyleManager.<>c__DisplayClass4_0.<Resolve>b__0(Action`1 afterCreated)
   at Castle.MicroKernel.Lifestyle.Scoped.CallContextLifetimeScope.GetCachedInstance(ComponentModel model, ScopedInstanceActivationCallback createInstance)
   at Castle.MicroKernel.Lifestyle.ScopedLifestyleManager.Resolve(CreationContext context, IReleasePolicy releasePolicy)
   at Castle.MicroKernel.Handlers.DefaultHandler.ResolveCore(CreationContext context, Boolean requiresDecommission, Boolean instanceRequired, Burden& burden)
   at Castle.MicroKernel.Handlers.DefaultHandler.Resolve(CreationContext context, Boolean instanceRequired)
   at Castle.MicroKernel.Resolvers.DefaultDependencyResolver.Resolve(CreationContext context, ISubDependencyResolver contextHandlerResolver, ComponentModel model, DependencyModel dependency)
   at Castle.MicroKernel.ComponentActivator.DefaultComponentActivator.CreateConstructorArguments(ConstructorCandidate constructor, CreationContext context)
   at Castle.MicroKernel.ComponentActivator.DefaultComponentActivator.Instantiate(CreationContext context)
   at Castle.MicroKernel.ComponentActivator.DefaultComponentActivator.InternalCreate(CreationContext context)
   at Castle.MicroKernel.ComponentActivator.AbstractComponentActivator.Create(CreationContext context, Burden burden)
   at Castle.MicroKernel.Lifestyle.AbstractLifestyleManager.CreateInstance(CreationContext context, Boolean trackedExternally)
   at Castle.MicroKernel.Lifestyle.ScopedLifestyleManager.<>c__DisplayClass4_0.<Resolve>b__0(Action`1 afterCreated)
   at Castle.MicroKernel.Lifestyle.Scoped.CallContextLifetimeScope.GetCachedInstance(ComponentModel model, ScopedInstanceActivationCallback createInstance)
   at Castle.MicroKernel.Lifestyle.ScopedLifestyleManager.Resolve(CreationContext context, IReleasePolicy releasePolicy)
   at Castle.MicroKernel.Handlers.DefaultHandler.ResolveCore(CreationContext context, Boolean requiresDecommission, Boolean instanceRequired, Burden& burden)
   at Castle.MicroKernel.Handlers.DefaultHandler.Resolve(CreationContext context, Boolean instanceRequired)
   at Castle.MicroKernel.DefaultKernel.ResolveComponent(IHandler handler, Type service, IDictionary additionalArguments, IReleasePolicy policy)
   at Castle.MicroKernel.DefaultKernel.Castle.MicroKernel.IKernelInternal.Resolve(Type service, IDictionary arguments, IReleasePolicy policy)
   at Castle.Windsor.WindsorContainer.Resolve[T]()
   at RedactedCustomer.MyFrameworkTech.TriggerableFactory.Create[TTriggerType]() in C:\BuildAgent\work\6c87fea77042db3f\backend\RedactedCustomer.MyFrameworkTech\TriggerableFactory.cs:line 17
   at Redacted.MyFramework.Workflow.TriggerExecutor.<LockAndExecuteAsync>d__13`2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Redacted.MyFramework.Workflow.TriggerExecutor.<ExecuteSingleAsync>d__12`2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Redacted.MyFramework.Workflow.TriggerExecutor.<ExecuteSingleAsync>d__12`2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Redacted.MyFramework.Workflow.WorkflowExecutionContext.<ExecuteCapturedActionsAsync>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Redacted.MyFramework.Workflow.MultiAsyncWorkflowExecutionContext.<ExecuteCapturedActionsAsync>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Redacted.MyFramework.Workflow.TriggerExecutor.<ExecuteSingleAsync>d__12`2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at RedactedCustomer.Core.BusinessLogic.CommandHandlers.MyCommandHandler.<ExecuteAsync>d__12.MoveNext() in C:\BuildAgent\work\6c87fea77042db3f\backend\core\RedactedCustomer.Core.BusinessLogic\CommandHandlers\MyCommandHandler.cs:line 282

1 个答案:

答案 0 :(得分：0)

这可能是由于 async/await 代码与 ConfigrueAwait(false) 结合造成的问题。

您在 ConfigureAwait(false) 调用之后执行 IOC/DI 代码，该调用有效地丢弃了当前的 HttpContext 实例。更准确地说，您可能正在某处调用 DI 来构造一个类，该类在生活方式中配置为（或具有 deps）配置为 PerWebRequest，但由于上述 ConfigureAwait(false)，当前请求已消失。我在 AutoMapper 的 IMappingAction 实现中遇到了这个问题，该实现将 PerWebRequest dep 注入到其构造函数中。

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