.Net标准DLL项目中的“生成”文件夹中缺少Nuget Pkg Dlls。 dll不是本地复制？在Visual Studio 2019中修复？ [英] Nuget Pkg Dlls Missing from Build Folder in .Net Standard DLL Project. dlls are Not Copy Local? Fix in Visual Studio 2019?

问题描述

我有Visual Studio 2019社区版

I have Visual Studio 2019 Community Edition

重现步骤：

我加载VS并开始一个全新的C＃.Net标准库项目。
我转到Nuget Pkg Manager并安装 ANY nuget软件包。
我在Class1.cs中添加了一行以使用包中的Type。

I load up VS and start a brand new C# .Net Standard Library project. I go to Nuget Pkg Manager and install ANY nuget package. I add a single line to Class1.cs to use a Type from the package.

例如，如果我安装了WatsonTCP nuget包，则更改了Class1。 cs看起来像这样：

For instance, if I install WatsonTCP nuget package, I change Class1.cs to look like this:

using System;
using WatsonTcp;

namespace NugetTest
{
    public class Class1
    {
        public Class1()
        {
            WatsonTcpClient client = new WatsonTcpClient("", 0);
        }
    }
}

我点击了重建解决方案。我检查bin / Debug文件夹，并且没有nuget软件包的dll在那里。对于发布版本，bin / Release也是如此。

I hit Rebuild Solution. I check the bin/Debug folder and none of the dlls for the nuget package are there. Same thing with bin/Release for a Release build.

我已经尽我所能解决了许多SO问题。我已经阅读了有关nuget的MSDN文档。

I have poored through as many SO issues as I can. I've read the MSDN documentation on nuget.

我将构建和运行MSBuild设置设置为详细。在生成日志中，对于每个单个dll，我都会看到以下输出 ：

I set Build and Run MSBuild settings to Detailed. In the build log, I see something like the following output for every single dll:

Primary reference "WatsonTcp, Version=2.0.7.0, Culture=neutral, PublicKeyToken=null".
Resolved file path is "C:\Users\James\.nuget\packages\watsontcp\2.0.7\lib\netstandard2.0\WatsonTcp.dll".
Reference found at search path location "{HintPathFromItem}".
This reference is not "CopyLocal" because at least one source item had "Private" set to "false" and no source items had "Private" set to "true".

我猜这是关于CopyLocal的通知，这是在构建文件夹中未输出任何内容的原因。但是我不确定100％。

I'm guessing this notice about CopyLocal is the reason nothing is being output in the build folder. But I'm not 100% sure.

SO大多包含较旧的问题，这些问题与.Net Core和.Net Standard之前的程序包参考时代有关。结果，每当我搜索与 CopyLocal有关的问题时，都会获得有关在DLL参考上显式设置CopyLocal属性的信息。我发现没有任何有用的信息通过Package Reference和RAR系统自动确定CopyLocal来解决我的问题。

SO mostly contains older questions that pertain to the pre-"package reference" era before .Net Core and .Net Standard. As a result, any time I search for issues pertaining to "CopyLocal", I get information on setting the CopyLocal property explicitly on a DLL Reference. I'm not finding anything helpful to fix my issue with automatic determination of CopyLocal by the Package Reference and RAR system.

有人可以帮助吗？

推荐答案

打开您的 xx.csproj （在VS中，双击解决方案资源管理器，或右键单击project => unload => edit ... ），然后向其中添加 CopyLocalLockFileAssemblies 属性，将其值设置为 true ，它将在构建过程中将所有程序集从nuget包复制到输出文件夹。

Open your xx.csproj(In VS, double-click the project name in Solution explorer, or right-click project=>unload=>edit...) and add the CopyLocalLockFileAssemblies property into it, set its value to true and it will copy all your assemblies from nuget packages to output folder during build process.

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <!--Add this line-->
    <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
  </PropertyGroup>

如果您的项目中有太多的nuget包，而您只想要其中的一部分，请尝试使用 PrivateAssets = All 可以防止VS将指定的一个复制到输出文件夹。

And if you have too many nuget packages in your project and you only want part of them, try using PrivateAssets="All" to prevent VS from copying the specified one to output folder.

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <!--Add this line to copy everything.-->
    <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="log4net" Version="2.0.8" />
    <PackageReference Include="Newtonsoft.Json" Version="12.0.3-beta1" />
    <PackageReference Include="WatsonTcp" Version="2.0.7" PrivateAssets="All"/>
  </ItemGroup>

例如：使用上面的脚本将复制 log4net 和 NewTonSoft.Json 而不是 WatsonTcp 来输出文件夹。更多详细信息，请参见 github / dotnet / sdk＃2235 。

Eg: Using script above will copy log4net and NewTonSoft.Json but not WatsonTcp to output folder. More details refer to github/dotnet/sdk#2235.

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