需要安装 Dnx Runtime 包

Question

在 Windows 10 x64 机器上运行的 VS2015 中，我在尝试构建 .net core Web 项目时遇到错误。

The Dnx Runtime package needs to be installed. See output window for more details

这是输出窗口日志（仅相关部分）

1>Done building target "BeforeCompile" in project "WebApplication1.xproj".
1>       Target "_TimeStampBeforeCompile" skipped, due to false condition; ('$(RunPostBuildEvent)'=='OnOutputUpdated' or ('$(RegisterForComInterop)'=='true' and '$(OutputType)'=='library')) was evaluated as (''=='OnOutputUpdated' or (''=='true' and 'Library'=='library')).
1>     1>
1>Target "GetRuntimeToolingPathTarget" in file "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DNX\Microsoft.DNX.targets" from project "C:\Users\v-prchep\Documents\Visual Studio 2015\Projects\WebApplication1\src\WebApplication1\WebApplication1.xproj" (target "CoreCompile" depends on it):
1>       Using "GetRuntimeToolingPath" task from assembly "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DNX\Microsoft.DNX.Tasks.dll".
1>       Task "GetRuntimeToolingPath"
1>       Done executing task "GetRuntimeToolingPath".
1>       Using "Error" task from assembly "Microsoft.Build.Tasks.Core, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".
1>       Task "Error"
1>     1>
1>C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DNX\Microsoft.DNX.targets(126,5): error : The Dnx Runtime package needs to be installed. See output window for more details.
1>       Done executing task "Error" -- FAILED.
1>     1>
1>Done building target "GetRuntimeToolingPathTarget" in project "WebApplication1.xproj" -- FAILED.
1>     1>
1>Target "_CheckForCompileOutputs" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\Users\v-prchep\Documents\Visual Studio 2015\Projects\WebApplication1\src\WebApplication1\WebApplication1.xproj" (target "_CleanGetCurrentAndPriorFileWrites" depends on it):
1>     1>
1>Done building target "_CheckForCompileOutputs" in project "WebApplication1.xproj".
1>       Target "_SGenCheckForOutputs" skipped, due to false condition; ('$(_SGenGenerateSerializationAssembliesConfig)' == 'On' or ('@(WebReferenceUrl)'!='' and '$(_SGenGenerateSerializationAssembliesConfig)' == 'Auto')) was evaluated as ('Off' == 'On' or (''!='' and 'Off' == 'Auto')).
1>     1>
1>Target "_CleanGetCurrentAndPriorFileWrites" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\Users\v-prchep\Documents\Visual Studio 2015\Projects\WebApplication1\src\WebApplication1\WebApplication1.xproj" (target "_CleanRecordFileWrites" depends on it):
1>       Task "ReadLinesFromFile"
1>       Done executing task "ReadLinesFromFile".
1>       Using "ConvertToAbsolutePath" task from assembly "Microsoft.Build.Tasks.Core, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a".
1>       Task "ConvertToAbsolutePath"
1>       Done executing task "ConvertToAbsolutePath".
1>       Task "FindUnderPath"
1>         Comparison path is "C:\Users\v-prchep\Documents\Visual Studio 2015\Projects\WebApplication1\src\WebApplication1".
1>       Done executing task "FindUnderPath".
1>       Task "FindUnderPath"
1>         Comparison path is "..\..\artifacts\bin\WebApplication1\".
1>       Done executing task "FindUnderPath".
1>       Task "FindUnderPath"
1>         Comparison path is "..\..\artifacts\obj\WebApplication1\Debug\".
1>       Done executing task "FindUnderPath".
1>       Task "RemoveDuplicates"
1>       Done executing task "RemoveDuplicates".
1>     1>
1>Done building target "_CleanGetCurrentAndPriorFileWrites" in project "WebApplication1.xproj".
1>     1>
1>Target "_CleanRecordFileWrites" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\Users\v-prchep\Documents\Visual Studio 2015\Projects\WebApplication1\src\WebApplication1\WebApplication1.xproj" (target "CoreBuild" depends on it):
1>       Task "RemoveDuplicates"
1>       Done executing task "RemoveDuplicates".
1>       Task "MakeDir"
1>       Done executing task "MakeDir".
1>       Task "WriteLinesToFile"
1>       Done executing task "WriteLinesToFile".
1>     1>
1>Done building target "_CleanRecordFileWrites" in project "WebApplication1.xproj".
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:00.02
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========

在日志后面，我检查了Microsoft.DNX.targets文件并找到了这一行

<Error Text="The Dnx Runtime package needs to be installed. See output window for more details." Condition="!Exists('$(RuntimeToolingExe)')" />

似乎它正试图从$(RuntimeToolingExe) 中找出dnx 路径，但我无法弄清楚它的设置位置。

注意：dnx 运行时已经安装，我可以使用以下命令从命令提示符运行应用程序

dnx web

应用程序运行良好。我相信这是我无法弄清楚的 VS2015 工具的问题。你能帮我解决这个问题吗？

PS：按照this SO thread 中提供的所有步骤操作似乎没有任何效果。

Answer 1

卸载styleCop后问题终于解决了。似乎 StyleCop 覆盖了 Visual Studio 正在寻找的 dnx 路径。然而，这只是一个猜测，我不是特别确定它为什么会起作用！