OmniSharp.MSBuild.ProjectManager尝试更新未加载的项目：

Question

我开始使用VS代码开发Asp.net核心Web API。但是，当我输入代码Intellisense / Suggestions无法正常工作时。我在互联网上的一些资源中看到他们正在键入using Microsoft.，EntityFrameworkCore显示为建议。但在我的情况下，它没有显示。在OmniSharp日志中显示以下错误给我。

Starting OmniSharp server at 4/5/2019, 3:37:16 PM
    Target: c:\Dotnet Core\NgWebApi

OmniSharp server started.
    Path: C:\Users\Acer\.vscode\extensions\ms-vscode.csharp-1.18.0\.omnisharp\1.32.11\OmniSharp.exe
    PID: 13684

[info]: OmniSharp.Stdio.Host
        Starting OmniSharp on Windows 6.2.9200.0 (x64)
[info]: OmniSharp.Services.DotNetCliService
        DotNetPath set to dotnet
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Located 1 MSBuild instance(s)
            1: StandAlone 15.0 - "C:\Users\Acer\.vscode\extensions\ms-vscode.csharp-1.18.0\.omnisharp\1.32.11\msbuild\15.0\Bin"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        MSBUILD_EXE_PATH environment variable set to 'C:\Users\Acer\.vscode\extensions\ms-vscode.csharp-1.18.0\.omnisharp\1.32.11\msbuild\15.0\Bin\MSBuild.exe'
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Registered MSBuild instance: StandAlone 15.0 - "C:\Users\Acer\.vscode\extensions\ms-vscode.csharp-1.18.0\.omnisharp\1.32.11\msbuild\15.0\Bin"
            CscToolExe = csc.exe
            CscToolPath = C:\Users\Acer\.vscode\extensions\ms-vscode.csharp-1.18.0\.omnisharp\1.32.11\msbuild\15.0\Bin\Roslyn
            MSBuildExtensionsPath = C:\Users\Acer\.vscode\extensions\ms-vscode.csharp-1.18.0\.omnisharp\1.32.11\msbuild
            MSBuildToolsPath = C:\Users\Acer\.vscode\extensions\ms-vscode.csharp-1.18.0\.omnisharp\1.32.11\msbuild\15.0\Bin
[info]: OmniSharp.Cake.CakeProjectSystem
        Detecting Cake files in 'c:\Dotnet Core\NgWebApi'.
[info]: OmniSharp.Cake.CakeProjectSystem
        Could not find any Cake files
[info]: OmniSharp.WorkspaceInitializer
        Project system 'OmniSharp.DotNet.DotNetProjectSystem' is disabled in the configuration.
[info]: OmniSharp.MSBuild.ProjectSystem
        No solution files found in 'c:\Dotnet Core\NgWebApi'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for 'c:\Dotnet Core\NgWebApi\NgWebApi.csproj'
[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in 'c:\Dotnet Core\NgWebApi'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Could not find any CSX files
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpWorkspaceOptionsProvider
[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: c:\Dotnet Core\NgWebApi\NgWebApi.csproj
[info]: OmniSharp.WorkspaceInitializer
        Configuration finished.
[info]: OmniSharp.Stdio.Host
        Omnisharp server running using Stdio at location 'c:\Dotnet Core\NgWebApi' on host 17188.
[warn]: OmniSharp.MSBuild.ProjectManager
        Failed to load project file 'c:\Dotnet Core\NgWebApi\NgWebApi.csproj'.
c:\Dotnet Core\NgWebApi\NgWebApi.csproj(1,1)
Microsoft.Build.Exceptions.InvalidProjectFileException: The SDK 'Microsoft.NET.Sdk.Web' specified could not be found.  c:\Dotnet Core\NgWebApi\NgWebApi.csproj
   at Microsoft.Build.Shared.ProjectErrorUtilities.ThrowInvalidProject(String errorSubCategoryResourceName, IElementLocation elementLocation, String resourceName, Object[] args)
   at Microsoft.Build.Evaluation.Evaluator`4.ExpandAndLoadImportsFromUnescapedImportExpressionConditioned(String directoryOfImportingFile, ProjectImportElement importElement, List`1& projects, Boolean throwOnFileNotExistsError)
   at Microsoft.Build.Evaluation.Evaluator`4.ExpandAndLoadImports(String directoryOfImportingFile, ProjectImportElement importElement)
   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.Project.Reevaluate(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.Project.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.Project.Initialize(IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.ProjectCollection.LoadProject(String fileName, IDictionary`2 globalProperties, String toolsVersion)
   at OmniSharp.MSBuild.ProjectLoader.EvaluateProjectFileCore(String filePath)
   at OmniSharp.MSBuild.ProjectLoader.BuildProject(String filePath)
   at OmniSharp.MSBuild.ProjectFile.ProjectFileInfo.Load(String filePath, ProjectLoader loader)
   at OmniSharp.MSBuild.ProjectManager.LoadOrReloadProject(String projectFilePath, Func`1 loader)

[fail]: OmniSharp.MSBuild.ProjectManager
        Attempted to update project that is not loaded: c:\Dotnet Core\NgWebApi\NgWebApi.csproj

我重新安装了VS Code和C#，C# Extention来解决这个问题，但它仍在发生。我认为原因是没有显示Intellisense / Suggestions项目没有正确加载。谁能告诉我如何避免这个错误以及如何解决没有显示问题的Intellisense / Suggestions。

Answer 1

解决了（在Ubuntu 16.04和CentOS 7上交叉检查）：

在VS Code菜单中，进入文件/首选项/设置。

在“搜索设置”窗口中，键入omnisharp.path

单击“在settings.json中编辑”链接。

像这样添加（或编辑）：“omnisharp.path”：“最新”

（来自：https://github.com/OmniSharp/omnisharp-vscode/issues/2965）

Answer 2

为了解决这个问题，我做了几项任务首先，我通过安装测试版降级OmniSharp版本。将该版本的.vsix文件下载到我的机器上。使用以下步骤将.vsix安装到Visual Studio代码中。

1. 打开Visual Studio Code并从菜单中选择View-> Extensions以显示Extensions窗格
2. 单击“扩展”窗格右上角的...，然后在菜单上选择“Install from VSIX...”。
3. 位于.vsix我下载的文件并打开它
4. 然后重启vs代码

但问题仍然存在，因此我将.Net核心SDK v2.2.202版本降级为2.1.202，问题解决了。

Answer 3

解决：检查是否安装了Visual Studio Build Packages，如果是，请将其卸载。一旦卸载VScode将正常工作并且intellisense功能将返回。祝好运！