Visual Studio 安装程序缺少选项值：InstallPath - Visual Studio 2019

Question

我有安装有效许可证（Visual Studio 订阅）的 Visual Studio 2019 企业版（VS 2019 16.1.4），一直使用良好。

突然间，当我尝试打开项目或项目中的任何文件时，出现以下错误。

所以我尝试使用Visual Studio卸载程序进行卸载，当我选择卸载程序时，它会自动更新，现在打开卸载程序时，它会显示：

当我点击“确定”时，它显示“您还没有安装任何内容”，并且只有安装VS 2019 16.2.0的选项。

即使我尝试安装VS 2019 16.2.0，也会出现以下错误信息：

“Visual Studio无法安装到非空目录'C：\ Program Files（x86）\Microsoft Visual Studio \ 2019 \ Enterprise'。”

请帮助我解决此错误。

更新

=====================
12-08-2019 06:31:09 PM
Recoverable
System.AggregateException: One or more errors occurred. ---> System.Runtime.InteropServices.COMException: Element not found. (Exception from HRESULT: 0x80070490)
   at Microsoft.VisualStudio.Setup.Configuration.ISetupConfiguration.GetInstanceForCurrentProcess()
   at Microsoft.VisualStudio.ProjectSystem.VS.DotNetCoreProjectCompatibilityDetector.<IsPrereleaseAsync>d__44.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.VS.DotNetCoreProjectCompatibilityDetector.<IsPreviewSDKInUseAsync>d__43.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.VS.DotNetCoreProjectCompatibilityDetector.<CheckCompatibilityAsync>d__47.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.VS.DotNetCoreProjectCompatibilityDetector.<<InitializeAsync>b__40_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.ProjectMultiThreadedService.<>c__DisplayClass32_1.<<Fork>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.VisualStudio.ProjectSystem.CommonProjectSystemTools.Rethrow(Exception ex)
   at Microsoft.VisualStudio.ProjectSystem.ProjectErrorReporting.<>c__DisplayClass6_0.<SubmitErrorReport>b__0()
   at Microsoft.VisualStudio.ProjectSystem.ExceptionFilter.<>c__DisplayClass2_0.<Guard>g__action|0()
   at GuardMethodClass.GuardMethod(Func`1 , Func`2 , Func`2 )
   --- End of inner exception stack trace ---
---> (Inner Exception #0) System.Runtime.InteropServices.COMException (0x80070490): Element not found. (Exception from HRESULT: 0x80070490)
   at Microsoft.VisualStudio.Setup.Configuration.ISetupConfiguration.GetInstanceForCurrentProcess()
   at Microsoft.VisualStudio.ProjectSystem.VS.DotNetCoreProjectCompatibilityDetector.<IsPrereleaseAsync>d__44.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.VS.DotNetCoreProjectCompatibilityDetector.<IsPreviewSDKInUseAsync>d__43.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.VS.DotNetCoreProjectCompatibilityDetector.<CheckCompatibilityAsync>d__47.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.VS.DotNetCoreProjectCompatibilityDetector.<<InitializeAsync>b__40_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.ProjectMultiThreadedService.<>c__DisplayClass32_1.<<Fork>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.VisualStudio.ProjectSystem.CommonProjectSystemTools.Rethrow(Exception ex)
   at Microsoft.VisualStudio.ProjectSystem.ProjectErrorReporting.<>c__DisplayClass6_0.<SubmitErrorReport>b__0()
   at Microsoft.VisualStudio.ProjectSystem.ExceptionFilter.<>c__DisplayClass2_0.<Guard>g__action|0()
   at GuardMethodClass.GuardMethod(Func`1 , Func`2 , Func`2 )<---

===================

我开始经常遇到这个问题（每周两次），唯一的解决方法就是每次重新安装。所以现在我将VS降级到了2017版。

- Gopi

---

我安装了.NET Core SDK 3.0.100-preview6-012264 后，就开始遇到同样的问题了。不幸的是，我强烈感觉那之后某些东西被损坏了。 - Efran Cobisi

我的电脑上没有安装 .NET Core SDK 3.x，但我遇到了相同的错误。 - Fırat Esmer

Answer 1

卸载VS 2019，请按照以下步骤清理已安装的VS并重新安装：

• 检查您的计算机上是否有此文件："%programfiles(x86)%\Microsoft Visual Studio\Installer\resources\app\layout\InstallCleanup.exe"

• 如果有，请从管理员命令提示符中使用-full参数启动它： InstallCleanup.exe -full

• 如果没有，请手动删除“%programfiles(x86)%\Microsoft Visual Studio\Installer”文件夹

• 重新启动新下载的vs_enterprise.exe（或vs_professional.exe或vs_community.exe...）

• 允许第一步安装安装程序

• 一旦安装程序出现并且您可以看到工作负载选择（.net桌面等），请关闭它

• 转到启动相同的InstallCleanup.exe以清除旧版VS

• 然后重新运行VS安装程序进行安装

请告诉我们这是否对您有用。

- Sara Liu - MSFT

---

感谢您的回复。为了避免上述错误，我手动删除了路径“C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise”下的文件，并安装了最新的VS16.2.x版本。但是现在，在“程序和功能”中，我看到了两个版本的Visual Studio 16.2.x和16.1.x，分别带有相应的安装日期。 - Gopi

看起来VS 2019 16.2已经成功安装了，对吧？只是“程序和功能”显示了16.1和16.2两个实例，您尝试在VS安装后重新启动计算机了吗？如果没有，请尝试一下。 - Sara Liu - MSFT

是的，我能够使用VS 2019 16.2。我已经多次重启了，但是“程序和功能”仍然显示安装了两个实例。 - Gopi

如果您右键单击VS 16.1.x并选择“卸载”，它将弹出安装程序并要求您确认是否卸载VS 2019企业版？我想之前的卸载失败没有完全清除记录，导致了这个显示问题。 - Sara Liu - MSFT

当我尝试更改或卸载VS 16.1.x时，无法卸载，它显示第二个错误图像。请查看更新。突然之间，我在加载项目时收到了该错误消息。 - Gopi

某种方式安装程序已经更新到最新版本，当我们尝试卸载/更改现有版本时，就会出现问题中提到的“更新”错误。如果我忽略这个错误而继续操作，那么就会导致问题中提到的原始错误。 :( - Gopi