Question

我正在将项目从.NET Core RC1转换为RC2。我已经安装了Visual Studio工具预览包并将VS Nuget插件更新到最新版本。

这是一个测试项目，因此我需要根据library guide将Microsoft.NETCore.App添加到project.json。它看起来像这样：

{
  "dependencies": {
    "dotnet-test-xunit": "1.0.0-rc2-build10015",
    "FluentAssertions": "4.2.1",
    "Microsoft.Extensions.PlatformAbstractions": "1.0.0-rc2-final",
    "Microsoft.NETCore.App": {
      "type": "platform",
      "version": "1.0.0-rc2-3002702"
    },
    "xunit": "2.1.0"
  },
  "frameworks": {
    "netcoreapp1.0": {
      "imports": [ "dotnet", "portable-net45+win8" ]
    }
  },
  "testRunner": "xunit",
}

项目在命令行（dotnet restore/build）上恢复和构建。但是，当Visual Studio尝试还原包时，我收到此错误：

PATH=.\node_modules\.bin;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Web\External;%PATH%;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Web\External\git
C:\Users\Nate\.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc2-20221\bin\dnx.exe "C:\Users\Nate\.dnx\runtimes\dnx-clr-win-x86.1.0.0-rc2-20221\bin\lib\Microsoft.Dnx.Tooling\Microsoft.Dnx.Tooling.dll" restore "C:\Users\Nate\Documents\stormpath-dotnet-config\test\Stormpath.Configuration.Test"
Microsoft .NET Development Utility Clr-x86-1.0.0-rc2-20221
  CACHE https://api.nuget.org/v3/index.json
Restoring packages for C:\Users\Nate\Documents\stormpath-dotnet-config\test\Stormpath.Configuration.Test\project.json
----------
C:\Users\Nate\Documents\stormpath-dotnet-config\test\Stormpath.Configuration.Test\project.json(0,0): Error: Microsoft.Dnx.Runtime.FileFormatException: unknown keyword platform ---> System.InvalidOperationException: unknown keyword platform
   at Microsoft.Dnx.Runtime.LibraryDependencyType.Parse(String keyword)
   at Microsoft.Dnx.Runtime.ProjectReader.PopulateDependencies(String projectPath, IList`1 results, JsonObject settings, String propertyName, Boolean isGacOrFrameworkReference)
   at Microsoft.Dnx.Runtime.ProjectReader.ReadProject(Stream stream, String projectName, String projectPath, ICollection`1 diagnostics)
   at Microsoft.Dnx.Runtime.Project.TryGetProject(String path, Project& project, ICollection`1 diagnostics)
   --- End of inner exception stack trace ---
   at Microsoft.Dnx.Runtime.Project.TryGetProject(String path, Project& project, ICollection`1 diagnostics)
   at Microsoft.Dnx.Tooling.RestoreCommand.<RestoreForProject>d__69.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.Dnx.Tooling.RestoreCommand.<>c__DisplayClass68_0.<<Execute>b__2>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 System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at Microsoft.Dnx.Tooling.RestoreCommand.<Execute>d__68.MoveNext()
----------
Restore failed
unknown keyword platform
NuGet Config files used:
    C:\ProgramData\NuGet\Config\Microsoft.VisualStudio.Offline.config
    C:\Users\Nate\AppData\Roaming\NuGet\nuget.config
Feeds used:
    https://api.nuget.org/v3-flatcontainer/
    C:\Users\Nate\Documents\LocalNuget
    C:\Program Files (x86)\Microsoft SDKs\NuGetPackages\

显然"type": "platform"属性正在抛弃它，但这不应该与最新的工具版本一起使用吗？

Answer 1

Tl; dr - 使用以下global.json值更新或替换version。

另外，确保NuGet为updated。（感谢小费，吉吉！）

此错误是由global.json中的旧工具版本引起的。如果该值尚未更新（迁移项目时容易错过），即使安装了最新的工具，也会莫名其妙地抛出此错误。

对于RC1时代的项目，您的global.json可能会是这样的：

{
  "projects": [ "src", "test" ],
  "sdk": {
    "version": "1.0.0-rc1-update1"
  }
}

对于.NET Core 1.0 RTM，它应该如下所示：

{
  "projects": [ "src", "test" ],
  "sdk": {
    "version": "1.0.0-preview2-003121"
  }
}

棘手的部分是即使version: 1.0.0-rc2-20221 也不会工作！ version: 1.0.0-preview2-003121是截至目前的正确值。上面的global.json文件将使用Visual Studio和dotnet build / dotnet run进行恢复和编译。

Answer 2

添加以下代码将绝对解决您的问题。我已经完成了这个错误并且达到了这个问题，但上面的回答确实适合我的场景，所以我添加了另一个帮助我的答案 -

在我的例子中，我们需要添加EntityFrameworkCore.Tools和EntityFrameworkCore.Designin project.json 需要在项目.json

中添加的代码

{
    "dependencies": {
        "Microsoft.EntityFrameworkCore.Design": {
            "version": "1.0.0-*",
            "type": "build"
        }
    },
    "tools": {
        "Microsoft.EntityFrameworkCore.Tools": "1.0.0-*"
    }
}

以下是可能对您有帮助的第二个变化

"frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dnx451",
        "portable-net45+win8"
      ]
    }
  },

Answer 3

尝试上述步骤后，问题仍未解决。然后我发现手动安装.NET Core - .NET Core运行时和框架（https://github.com/dotnet/cli）。

安装完成后，问题得到解决，并确保在tools->option->projects and solutions->External web tools

中映射node.js路径

enter image description here

在Visual Studio中还原时的“未知关键字平台”

3 个答案: