visual-studio-2019 - InvalidProjectFileException : "The SDK ' Microsoft. NET.Sdk.Web' not found"from Microsoft.Build.Evaluation.Project 升级到 VS2019 后

Question

我们有一个工具可以使用 Microsoft.Build.Evaluation.Project 加载 csproj 文件。它已经运行了大约一年，直到我们尝试在安装了 VS2019(并且没有 VS2017 的副本)的机器上运行它。有趣的是，它确实可以通过 dotnet build 构建得很好——只有构建评估会提示它。

我确实看到了一些关于安装某些软件包的 32 位版本的建议。我没有尝试这样做，但我确实尝试在 64 位模式下运行我的可执行文件，它仍然抛出 InvalidProjectFileException。

我怀疑我可能需要做一个小更新以指向不同的工具集，但由于我不是代码的作者，所以我不完全确定在哪里进行更改。有什么建议吗？

谢谢!

抛出的异常:

Unhandled Exception: Microsoft.Build.Exceptions.InvalidProjectFileException: The SDK 'Microsoft.NET.Sdk.Web' specified could not be found.  c:\foo\bar\baz.csproj
   at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject(String errorSubCategoryResourceName, IElementLocation elementLocation, String resourceName, Object[] args)
   at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject[T1](IElementLocation elementLocation, String resourceName, T1 arg0)
   at Microsoft.Build.Evaluation.Evaluator`4.ExpandAndLoadImportsFromUnescapedImportExpressionConditioned(String directoryOfImportingFile, ProjectImportElement importElement, List`1& projects, SdkResult& sdkResult, Boolean throwOnFileNotExistsError)
   at Microsoft.Build.Evaluation.Evaluator`4.ExpandAndLoadImports(String directoryOfImportingFile, ProjectImportElement importElement, SdkResult& sdkResult)
   at Microsoft.Build.Evaluation.Evaluator`4.EvaluateImportElement(String directoryOfImportingFile, ProjectImportElement importElement)
   at Microsoft.Build.Evaluation.Evaluator`4.PerformDepthFirstPass(ProjectRootElement currentProjectOrImport)
   at Microsoft.Build.Evaluation.Evaluator`4.Evaluate(ILoggingService loggingService, BuildEventContext buildEventContext)
   at Microsoft.Build.Evaluation.Evaluator`4.Evaluate(IEvaluatorData`4 data, ProjectRootElement root, ProjectLoadSettings loadSettings, Int32 maxNodeCount, PropertyDictionary`1 environmentProperties, ILoggingService loggingService, IItemFactory`2 itemFactory, IToolsetProvider toolsetProvider, ProjectRootElementCache projectRootElementCache, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project.Reevaluate(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project.Initialize(IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile)

有问题的 .csproj 看起来像这样:

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="GraphQL" Version="2.4.0" />
    <PackageReference Include="GraphQL.Server.Transports.AspNetCore" Version="3.4.0" />
    <PackageReference Include="GraphQL.Server.Transports.WebSockets" Version="3.4.0" />
    <PackageReference Include="GraphQL.Server.Ui.GraphiQL" Version="3.4.0" />
    <PackageReference Include="GraphQL.Server.Ui.Playground" Version="3.4.0" />
    <PackageReference Include="GraphQL.Server.Ui.Voyager" Version="3.4.0" />
    <PackageReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Microsoft.AspNetCore.Hosting.WindowsServices" Version="2.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="2.1.1" />
  </ItemGroup>
  <ItemGroup>
     <!-- About a dozen references to other .csproj files -->
  </ItemGroup>
  <ItemGroup>
    <Content Update="config\FooBar.Config.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </Content>
  </ItemGroup>
</Project>

以下是来自 dotnet.exe 的一些信息:

$ dotnet --list-sdks
2.1.302 [C:\Program Files\dotnet\sdk]
2.1.400 [C:\Program Files\dotnet\sdk]
2.1.503 [C:\Program Files\dotnet\sdk]
2.1.508 [C:\Program Files\dotnet\sdk]
2.1.802 [C:\Program Files\dotnet\sdk]
3.0.100 [C:\Program Files\dotnet\sdk]

$ dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   2.1.508
 Commit:    9ba8583e91

Runtime Environment:
 OS Name:     Windows
 OS Version:  6.3.9600
 OS Platform: Windows
 RID:         win81-x64
 Base Path:   C:\Program Files\dotnet\sdk\2.1.508\

Host (useful for support):
  Version: 3.0.0
  Commit:  7d57652f33

.NET Core SDKs installed:
  2.1.302 [C:\Program Files\dotnet\sdk]
  2.1.400 [C:\Program Files\dotnet\sdk]
  2.1.503 [C:\Program Files\dotnet\sdk]
  2.1.508 [C:\Program Files\dotnet\sdk]
  2.1.802 [C:\Program Files\dotnet\sdk]
  3.0.100 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.2.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.2.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

$ type ..\..\..\global.json
{
  "sdk": {
    "version": "2.1.508"
  }
}

Answer 1

VS 2019。我遇到了同样的问题。我能够通过设置 MSBUILD_EXE_PATH 环境变量来修复它。

  Environment.SetEnvironmentVariable("MSBUILD_EXE_PATH", sdkPath);

诀窍是您必须指定实际的 MSBuild.exe 路径(如果您安装了不同的 VSs 版本，这可能是一项找到正确版本的任务)。

这是代码片段。来自https://github.com/RicoSuter/DNT伙计们。

 private static void SetMsBuildExePath()
        {
            try
            {
                var startInfo = new ProcessStartInfo("dotnet", "--list-sdks")
                {
                    RedirectStandardOutput = true,
                   UseShellExecute = false
                };
               

                var process = Process.Start(startInfo);
                
                process.WaitForExit(1000);

                var output = process.StandardOutput.ReadToEnd();
                var sdkPaths = Regex.Matches(output, "([0-9]+.[0-9]+.[0-9]+) \\[(.*)\\]")
                    .OfType<Match>()
                    .Select(m => System.IO.Path.Combine(m.Groups[2].Value, m.Groups[1].Value, "MSBuild.dll"));

                var sdkPath = sdkPaths.Last();
                Environment.SetEnvironmentVariable("MSBUILD_EXE_PATH", sdkPath);
            }
            catch (Exception exception)
            {
               
            }
        }

只需在构建过程之前使用该方法，我认为这将解决所描述的问题。