笔者的VS2010的Test Project遇到了一样的问题.
错误信息例子:
An exception was encountered while constructing the content of this frame. This information is also logged by running the application with the /log parameter on the command line, which stores results in "C:\Users\sdavis\AppData\Roaming\Microsoft\VisualStudio\10.0\ActivityLog.xml".
Exception details:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.ArgumentException: There is already a command handler for the menu command 'b85579aa-8be0-4c4f-a850-90902b317571 : 13074'.
at System.ComponentModel.Design.MenuCommandService.AddCommand(MenuCommand command)
at Microsoft.VisualStudio.TestTools.Vsip.CommandHelper.AddCommand(IMenuCommandService menuService, EventHandler invokeHandler, EventHandler statusHandler, CommandID id)
at Microsoft.VisualStudio.TestTools.TestCaseManagement.TestViewToolWindow.Initialize()
at Microsoft.VisualStudio.TestTools.TestCaseManagement.TestViewToolWindowHost..ctor()
--- End of inner exception stack trace ---
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id, ProvideToolWindowAttribute tool)
at Microsoft.VisualStudio.Shell.Package.FindToolWindow(Type toolWindowType, Int32 id, Boolean create, ProvideToolWindowAttribute tool)
at Microsoft.VisualStudio.Shell.Package.Microsoft.VisualStudio.Shell.Interop.IVsToolWindowFactory.CreateToolWindow(Guid& toolWindowType, UInt32 id)
at Microsoft.VisualStudio.Platform.WindowManagement.WindowFrame.ConstructContent()
解决方案
====================
重启VS2010. –_-||
彻底解决方案
====================
1. Go to the Tools main menu -> Options… | Test Tools
2. Check the checkbox “Show all settings” to see the Test Tools settings
3. For the condition that reads “ When changes are made to the tests and background discovery of test methods is not enabled” (#9 from the top), choose “Don’t prompt”
参考资料
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Test View return an exception
Test View Issue: An exception was encountered while constructing the content of this frame