在解决方案内的项目上使用时缺少NuGet包

Question

我看过这个答案：

编辑。csproj文件并更正解决方案文件夹(包含packages文件夹)的相对路径为我解决了这个问题。

但是我不知道该编辑什么。

我正在Visual Studio 2013中制作一个C项目。我有一个包含三个项目的解决方案。其中一个项目需要Nuget包。

我在我的解决方案上使用Manage NuGet软件包来安装NuGet包。从那里我选择了一个需要这个包的项目。我还使用了Enable NuGet Package Restore。

通过这样做，我最终在解决方案目录中获得了一个. nuget和包文件夹。

当我尝试构建需要包的项目时，我收到了错误：

此项目引用此计算机上缺失的NuGet包。请启用NuGet包还原以下载它们。有关详细信息，请参见http://go.microsoft.com/fwlink/?LinkID=322105.缺失的文件是……\cpprestsdk.v120.winapp.msvcstl.dyn.rt\-dyn.2.9.1\构建\本机\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets.

如果我按照提到的路径，假设它相对的目录是项目的项目目录，那么“丢失的文件”就在那里。

有这个问题的项目，是我以前单独使用的一个项目(有它自己的解决方案)，并且已经被复制粘贴到这个有三个项目的解决方案中。所以我才提到了另一个问题的答案和帖子的顶部。该答案建议编辑一个项目文件。如果我打开我的。vcxproj文件我看到这个:

<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
  <ImportGroup Label="ExtensionTargets">
    <Import Project="..\packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets" Condition="Exists('..\packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" />
    <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
    <Import Project="..\..\packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets" Condition="Exists('..\..\packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets')" />
    <Import Project="..\..\packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets" Condition="Exists('..\..\packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" />
  </ImportGroup>
  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
    <Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
    <Error Condition="!Exists('..\..\packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets'))" />
    <Error Condition="!Exists('..\..\packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets'))" />
    <Error Condition="!Exists('..\..\packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets'))" />
  </Target>

我非常不确定要编辑什么。

我可以猜测，也许某些路径应该从项目目录的相对路径更改为解决方案目录的相对路径。但通过编辑到：

  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
  <ImportGroup Label="ExtensionTargets">
    <Import Project="packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets" Condition="Exists('packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" />
    <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
    <Import Project="packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets" Condition="Exists('packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets')" />
    <Import Project="packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets" Condition="Exists('packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" />
  </ImportGroup>
  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
    <Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
    <Error Condition="!Exists('packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets'))" />
    <Error Condition="!Exists('packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets'))" />
    <Error Condition="!Exists('packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets'))" />
  </Target>

Visual Studio会给我一个错误，指出：已经添加了具有相同键的项目。然后，项目在解决方案浏览器中标记为（加载失败）。

我在这里做错了什么？

Answer 1

通过这个回答我找到了自己的解决方法。

在.vcxproj文件中，我删除了以下内容：

<Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
    <Error Condition="!Exists('$(SolutionDir)\.nuget\NuGet.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\.nuget\NuGet.targets'))" />
    <Error Condition="!Exists('packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.winapp.msvcstl.dyn.rt-dyn.targets'))" />
    <Error Condition="!Exists('packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets'))" />
    <Error Condition="!Exists('packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.2.9.1\build\native\cpprestsdk.v120.windesktop.msvcstl.dyn.rt-dyn.targets'))" />
  </Target>

我现在可以构建这个项目了。

这可能不是最佳解决方案，因为这些错误条件的存在是有原因的。但是编辑路径没有帮助。