问题描述
我有一个被许多其他 Web 应用程序项目引用的类库.它的 app.config 中有许多我希望在所有引用 Web 项目中使用的设置.构建类库时，它会将 app.config 作为 .dll.config 复制到自己的 bin 文件夹中.
I have a class library that is referenced by many other web application projects. It has many settings in its app.config that I wish to use in all of the referencing web projects. When the class library is built, it copies the app.config to its own bin folder as <assembly.name>.dll.config.
- 默认情况下，Visual Studio/MSBuild 似乎不这样做.
- 更改
Copy to Output Directory或Build Action(任意组合)不起作用. - SlowCheetah VS 扩展似乎可以做我想做的事情，这是其配置转换过程的意外副作用，但我想这样做 没有任何第 3 方扩展.
- Visual Studio / MSBuild does not seem to do this by default.
- Changing
Copy to Output DirectoryorBuild Action(in any combination) does not work. - SlowCheetah VS extension appears to do what I want as an unintended side-effect of its config transform process, but I want to do this without any 3rd-party extensions.
顺便说一句:手动将所有这些配置放入每个 Web 应用程序项目中是不切实际的.我可以通过在 bin 文件夹中查找 <assembly.name>.dll.config 来读取文件，然后从那里提取设置.我已经可以做到这一点，所以这不是问题 - 我只需要确保文件可以在那里阅读
As an aside: It's impractical to manually put all of this config in each of the web application projects. I can read the file by looking for <assembly.name>.dll.config in the bin folder, and extract the settings from there. I can already do this, so that's not an issue - I just need to ensure the file is going to be there for reading
推荐答案
这可以通过将以下内容添加到类库的项目文件 assembly.name.csproj 来实现，无需 3rd-party 工具:
This can be achieved without 3rd-party tools by adding the following to the class library's project file, assembly.name.csproj:
// Find this <Import> element for Microsoft.CSharp.targets
<Import Project="$(MSBuildToolsPath)Microsoft.CSharp.targets" />
// Add this <ItemGroup> element immediately after
<ItemGroup>
<Content Include="app.config">
<Link>$(TargetName).dll.config</Link>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
</ItemGroup>
这会导致 app.config 被复制到将其作为 .dll.config 引用的任何项目.很好，因为你只需要配置一个.csproj文件，效果就级联到所有引用的项目.
This causes the app.config to be copied to whichever project is referencing it as <assembly.name>.dll.config. It's good because you only need to configure the one .csproj file and the effect cascades out to all referencing projects.
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