尝试加载项目时，项目系统遇到错误 [英] The project system has encountered an error When trying to load project

问题描述

在Visual Studio 2017 v15.7.1中，尝试加载我的项目之一时出现以下错误窗口:

In Visual Studio 2017 v15.7.1 I am getting the following error window when trying to load one of my projects:

当我转到指定的路径时，在测试文件中，我发现一个很长的堆栈跟踪，由于它超出了允许的字符数，因此我无法复制所有堆栈跟踪.

And when I go to the path specified, inside the test file I find a very long stack-trace which I could not copy all of it because it exceeds allowed characters count.

===================== 5/31/2018 3:40:57 PM LimitedFunctionality System.AggregateException:项目系统数据流 由于以下原因，"ProjectBuildSnapshotService外层320459"已关闭 异常:System.AggregateException:发生一个或多个错误. ---> System.AggregateException:发生一个或多个错误. ---> System.AggregateException:发生一个或多个错误. ---> System.AggregateException:发生一个或多个错误. ---> System.NullReferenceException:对象引用未设置为实例 一个对象.在 Microsoft.VisualStudio.ProjectServices.DesignTimeBuilder.d__17.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuilderService.BuilderLifetimeHelper.d__12.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuilderService.d__36.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuilderService.d__36.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(任务任务)
在 Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuildManagerService.d__55.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(任务任务)
在 Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuildManagerService.d__53.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) Microsoft.VisualStudio.ProjectSystem.Designers.ProjectBuildSnapshotService.d__74.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(任务任务)
在 Microsoft.VisualStudio.ProjectSystem.Designers.ProjectBuildSnapshotService.<> c__DisplayClass72_0.< b__0> d.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) Microsoft.VisualStudio.Threading.JoinableTask.d__78.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) Microsoft.VisualStudio.Threading.JoinableTask 1.<JoinAsync>d__3.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.Designers.ProjectBuildSnapshotService.<UpdateSnapshotCoreAsync>d__72.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Microsoft.VisualStudio.ProjectSystem.Designers.CustomizableBlockSubscriberBase 3.d__34.MoveNext() ---从之前引发异常的位置开始的堆栈跟踪- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) Microsoft.VisualStudio.ProjectSystem.Designers.CustomizableBlockSubscriberBase 3.<>c__DisplayClass32_0.<<Initialize>b__1>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.Threading.JoinableTask.<JoinAsync>d__78.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.Designers.CustomizableBlockSubscriberBase3.< b__32_0> d.MoveNext() ---从上一个引发异常的位置开始的堆栈跟踪--- System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务) System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务) Microsoft.VisualStudio.ProjectSystem.DataflowExtensions.<> c__DisplayClass24_0`2.< b__0> d.MoveNext()

===================== 5/31/2018 3:40:57 PM LimitedFunctionality System.AggregateException: Project system data flow 'ProjectBuildSnapshotService Outer 320459' closed because of an exception: System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.VisualStudio.ProjectServices.DesignTimeBuilder.d__17.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuilderService.BuilderLifetimeHelper.d__12.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuilderService.d__36.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuilderService.d__36.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuildManagerService.d__55.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Microsoft.VisualStudio.ProjectSystem.Build.DesignTimeBuildManagerService.d__53.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.Designers.ProjectBuildSnapshotService.d__74.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Microsoft.VisualStudio.ProjectSystem.Designers.ProjectBuildSnapshotService.<>c__DisplayClass72_0.<b__0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.Threading.JoinableTask.d__78.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.Threading.JoinableTask1.<JoinAsync>d__3.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.Designers.ProjectBuildSnapshotService.<UpdateSnapshotCoreAsync>d__72.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at Microsoft.VisualStudio.ProjectSystem.Designers.CustomizableBlockSubscriberBase3.d__34.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.Designers.CustomizableBlockSubscriberBase3.<>c__DisplayClass32_0.<<Initialize>b__1>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.Threading.JoinableTask.<JoinAsync>d__78.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.Designers.CustomizableBlockSubscriberBase3.<b__32_0>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.VisualStudio.ProjectSystem.DataflowExtensions.<>c__DisplayClass24_0`2.<b__0>d.MoveNext()

推荐答案

我发现您需要执行两个步骤来解决此问题:

I found that you need to do two steps to resolve this issue:

1. 在解决方案级别删除.vs文件夹.
2. 删除解决方案中所有项目中的bin和obj文件夹.

1. Delete the .vs folder at the solution level.
2. Delete the bin and obj folders in all projects within the solution.

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我在Visual Studio 2017 v15.7.4中遇到了问题，并且受影响的项目/解决方案是在v15.7.4中创建的，因此可以在不升级到新版本的Visual Studio的情况下发生.

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I encountered the issue in Visual Studio 2017 v15.7.4 and the affected project/solution was created in v15.7.4, so it can occur without upgrading to a new version of Visual Studio.

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