错误 NU1105 无法找到项目信息 - 项目文件可能无效或缺少还原所需的目标 [英] Error NU1105 Unable to find project information - The project file may be invalid or missing targets required for restore

问题描述

突然间，我在一个解决方案中收到了 3 个项目的以下错误:

All of a sudden, I am getting the following errors for 3 projects in a solution:

Error NU1105 Unable to find project information for 'C:\code\example\src\libs\example.I18n\example.I18n.csproj'. 
The project file may be invalid or missing targets required for restore.

项目中唯一改变的是一些数据库更改，但我过去从未遇到任何问题.唯一的另一件事是我更新到了 Visual Studio 2017 15.5.这会导致问题吗?

The only thing that has changed in the project is a couple of DB changes, but I never had any issues in the past. The only other thing is that I updated to Visual Studio 2017 15.5. Could that cause issues?

我尝试从源代码管理中删除并重新克隆解决方案，但仍然出现错误.我同事的机器没有问题，所以肯定是本地的.

I have tried removing and recloning the solution from source control, but still getting errors. No problems on my colleagues' machines, so it must be something local.

.csproj 文件之一的示例(如果有帮助):

Example of one of the .csproj files if this helps:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net452</TargetFramework>
    <AssemblyName>Example.I18n</AssemblyName>
    <PackageId>Example.I18n</PackageId>
    <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
    <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
    <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="1.1.2" />
    <PackageReference Include="Microsoft.Extensions.Logging" Version="1.1.1" />
    <PackageReference Include="MessageFormat" Version="1.0.1" />
  </ItemGroup>

  <ItemGroup Condition=" '$(TargetFramework)' == 'net452' ">
    <Reference Include="System" />
    <Reference Include="Microsoft.CSharp" />
  </ItemGroup>

</Project>

推荐答案

对我来说，磁盘上项目文件的大小写与解决方案文件中的大小写不匹配.

For me, the casing of the project file on disk did not match the casing in the solution file.

假设我有一个使用 LibraryA.csproj 和 LibraryB.csproj 的解决方案，其中 LibraryB.csproj 引用了 LibraryA.csproj.在构建 LibraryB.csproj 时，解决方案文件中 LibraryA.csproj 的大小写不正确会导致 NU1105:

Say I had a solution with LibraryA.csproj and LibraryB.csproj, where LibraryB.csproj has a reference to LibraryA.csproj. Having an incorrect casing for LibraryA.csproj in the solution file would cause NU1105 when building LibraryB.csproj:

Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "LibraryA", "LibraryA\Librarya.csproj", "{24DEBB3B-762A-491D-8B83-6D078C0B30C0}"

我在升级到 Visual Studio 2017 15.5 版本后开始看到这个问题.我在 15.4.5 版本中没有遇到这个问题.

I started seeing this problem after upgrading to version 15.5 of Visual Studio 2017. I did not encounter this problem with version 15.4.5.

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