NuGet选择了错误的DLL (32位与64位)

Question

我使用的是一个.net NuGet，它包含一个编译成本机代码的DLL。本机DLL有两个版本，32位版本和64位版本。

nuget使用其"build“文件夹中的".targets”文件来确定要复制的DLL。目标文件如下所示：

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <!-- Ensure that for Framework projects the correct DLL is copied to the build directory -->
  
  <ItemGroup Condition=" '$(Platform)' == 'x64' OR '$(Platform)' == 'AnyCPU' ">
    <Content Include="$(MSBuildThisFileDirectory)..\runtimes\win-x64\native\FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Native.dll">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <Link>FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Native.dll</Link>
    </Content>
  </ItemGroup>

  <ItemGroup Condition=" '$(Platform)' == 'x86' ">
    <Content Include="$(MSBuildThisFileDirectory)..\runtimes\win-x86\native\FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Native.dll">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <Link>FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Native.dll</Link>
    </Content>
  </ItemGroup>

</Project>

然而，即使我使用的是64位计算机和64位构建目标，它始终是32位版本最终在我的构建的"Bin“文件夹中。

有谁知道这个过程是如何工作的，以及是什么决定了NuGet将决定以哪个平台为目标？如何使nuget-restore-and-build进程选择64位DLL？(使用Visual Studio或msbuild执行构建)

Answer 1

您发布的目标文件与最新版本(4.2.4)的FiftyOne.DeviceDetection.Hash.Engine.OnPremise NuGet软件包的目标文件不匹配，其中AnyCPU匹配的是x86平台，而不是x64平台：

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <!-- Ensure that for Framework projects the correct DLL is copied to the build directory -->
  
  <ItemGroup Condition=" '$(Platform)' == 'x64' ">
    <Content Include="$(MSBuildThisFileDirectory)..\runtimes\win-x64\native\FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Native.dll">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <Link>FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Native.dll</Link>
    </Content>
  </ItemGroup>

  <ItemGroup Condition=" '$(Platform)' == 'x86' OR '$(Platform)' == 'AnyCPU' ">
    <Content Include="$(MSBuildThisFileDirectory)..\runtimes\win-x86\native\FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Native.dll">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <Link>FiftyOne.DeviceDetection.Hash.Engine.OnPremise.Native.dll</Link>
    </Content>
  </ItemGroup>

</Project>

因此，为了让正确的本机dll在您的输出目录中结束，您应该在您的csproj文件中添加<Platform>x64</Platform>，或者通过指定如下Platform属性来构建您的项目：

dotnet build /p:Platform=x64 MyApp.csproj