C# 字典中不存在给定的键（在fb canvas页面教程之后）

我完全按照教程进行操作，但是当我运行项目时，它给了我一个错误，说给定的键在字典中不存在。当我到目前为止在项目中几乎什么都没做的时候，有没有关于这是如何发生的想法

以下是堆栈跟踪：

[KeyNotFoundException: The given key was not present in the dictionary.]
System.Collections.Generic.Dictionary`2.get_Item(TKey key) +11165993
Microsoft.AspNet.Facebook.PermissionsStatus.ConvertApiResult(IList`1 apiResults) +189
Microsoft.AspNet.Facebook.PermissionsStatus..ctor(IList`1 apiResult) +68

Microsoft.AspNet.Facebook.Providers.DefaultFacebookPermissionService.GetUserPermissionsStatus(String userId, String accessToken) +261
Microsoft.AspNet.Facebook.Authorization.FacebookAuthorizeFilter.OnAuthorization(AuthorizationContext filterContext) +5655
System.Web.Mvc.ControllerActionInvoker.InvokeAuthorizationFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor) +143
System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__19(AsyncCallback asyncCallback, Object asyncState) +1680
System.Web.Mvc.Async.WrappedAsyncResult`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +59
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +151
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object state, BeginInvokeDelegate beginDelegate, EndInvokeDelegate`1 endDelegate, Object tag, Int32 timeout) +94
System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction(ControllerContext controllerContext, String actionName, AsyncCallback callback, Object state) +559
System.Web.Mvc.Controller.<BeginExecuteCore>b__1c(AsyncCallback asyncCallback, Object asyncState, ExecuteCoreState innerState) +82
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +73
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +151
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object callbackState, BeginInvokeDelegate`1 beginDelegate, EndInvokeVoidDelegate`1 endDelegate, TState invokeState, Object tag, Int32 timeout, SynchronizationContext callbackSyncContext) +105
System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +588
System.Web.Mvc.Controller.<BeginExecute>b__14(AsyncCallback asyncCallback, Object callbackState, Controller controller) +47
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +65
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +151
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object callbackState, BeginInvokeDelegate`1 beginDelegate, EndInvokeVoidDelegate`1 endDelegate, TState invokeState, Object tag, Int32 timeout, SynchronizationContext callbackSyncContext) +139
System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +484
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +50
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__4(AsyncCallback asyncCallback, Object asyncState, ProcessRequestState innerState) +98
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate(AsyncCallback callback, Object callbackState) +73
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +151
System.Web.Mvc.Async.AsyncResultWrapper.Begin(AsyncCallback callback, Object callbackState, BeginInvokeDelegate`1 beginDelegate, EndInvokeVoidDelegate`1 endDelegate, TState invokeState, Object tag, Int32 timeout, SynchronizationContext callbackSyncContext) +106
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +446
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +88
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +50
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +834
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +188

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34009

[KeyNotFoundException:字典中不存在给定的键。]
System.Collections.Generic.Dictionary`2.get_项（TKey）+11165993
Microsoft.AspNet.Facebook.PermissionsStatus.ConvertApiResult（IList`1 apiResults）+189
Microsoft.AspNet.Facebook.PermissionsStatus..ctor（IList`1 apireult）+68
Microsoft.AspNet.Facebook.Providers.DefaultFacebookPermissionService.GetUserPermissionsStatus（字符串userId，字符串accessToken）+261
Microsoft.AspNet.Facebook.Authorization.FaceBookAuthorizationFilter.OnAuthorization（AuthorizationContext filterContext）+5655
System.Web.Mvc.ControllerActionInvoker.InvokeAuthorizationFilters（ControllerContext ControllerContext，IList`1 filters，ActionDescriptor ActionDescriptor）+143
System.Web.Mvc.Async.c__显示类21.b__19（AsyncCallback AsyncCallback，Object asyncState）+1680
System.Web.Mvc.Async.WrappedAsyncResult`1.CallBeginDelegate（AsyncCallback回调，对象callbackState）+59
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin（异步回调，对象状态，Int32超时）+151
System.Web.Mvc.Async.AsyncResultRapper.Begin（AsyncCallback回调，对象状态，BeginInvokeDelegate beginDelegate，EndInvokeDelegate`1 endDelegate，对象标记，Int32超时）+94
System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction（ControllerContext ControllerContext，String actionName，AsyncCallback回调，对象状态）+559
System.Web.Mvc.Controller.b_uu1c（AsyncCallback-AsyncCallback，Object-asyncState，executeRecreat-innerState）+82
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate（AsyncCallback回调，对象callbackState）+73
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin（异步回调，对象状态，Int32超时）+151
System.Web.Mvc.Async.AsyncResultRapper.Begin（AsyncCallback回调，对象callbackState，BeginInvokeDelegate`1 beginDelegate，EndInvokeVoidDelegate`1 endDelegate，TState invokeState，对象标记，Int32超时，SynchronizationContext callbackSyncContext）+105
System.Web.Mvc.Controller.BeginExecuteCore（异步回调，对象状态）+588
System.Web.Mvc.Controller.b_uu14（异步回调、异步回调、对象回调、控制器控制器）+47
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate（AsyncCallback回调，对象callbackState）+65
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin（异步回调，对象状态，Int32超时）+151
System.Web.Mvc.Async.AsyncResultRapper.Begin（AsyncCallback回调、对象callbackState、BeginInvokeDelegate`1 beginDelegate、EndInvokeVoidDelegate`1 endDelegate、TSState invokeState、对象标记、Int32超时、SynchronizationContext callbackSyncContext）+139
System.Web.Mvc.Controller.BeginExecute（RequestContext RequestContext，AsyncCallback回调，对象状态）+484
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute（RequestContext RequestContext，AsyncCallback回调，对象状态）+50
System.Web.Mvc.MvcHandler.b_uu4（AsyncCallback AsyncCallback，Object asyncState，ProcessRequestState innerState）+98
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallBeginDelegate（AsyncCallback回调，对象callbackState）+73
System.Web.Mvc.Async.WrappedAsyncResultBase`1.Begin（异步回调，对象状态，Int32超时）+151
System.Web.Mvc.Async.AsyncResultRapper.Begin（AsyncCallback回调，对象callbackState，BeginInvokeDelegate`1 beginDelegate，EndInvokeVoidDelegate`1 endDelegate，TState invokeState，对象标记，Int32超时，SynchronizationContext callbackSyncContext）+106
System.Web.Mvc.MvcHandler.BeginProcessRequest（HttpContextBase httpContext，异步回调，对象状态）+446
System.Web.Mvc.MvcHandler.BeginProcessRequest（HttpContext HttpContext，异步回调，对象状态）+88
System.Web.Mvc.MvcHandler.System.Web.IHTTPassynchandler.BeginProcessRequest（HttpContext上下文，AsyncCallback cb，Object extraData）+50
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+834
System.Web.HttpApplication.ExecuteStep（IExecutionStep步骤，布尔值&同步完成）+188
版本信息：Microsoft.NET Framework版本：4.0.30319；ASP.NET版本：4.0.30319.34009

Microsoft.AspNet.Mvc.Facebook库中出现问题。我修补了lib并将修复程序发送给AspNetMvcStack团队进行审查/集成。票上解释了一切：）

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门票：

嗨，只是一个温和的建议。尽量保持结果/日志的格式，例如，这里我将结果放在文本区域。一般来说，试着跟随。你的原文读起来真的很痛苦。谢谢。我把它放在代码格式中，因为我认为这是应该用于堆栈跟踪的。堆栈溢出与此不同，您缩进四个空格以创建一个a或

块。遇到了完全相同的问题，您找到了解决方案吗？