如何为一个库定位多个框架

Question

我正在根据下载的框架制作这个标准库。例如，对于 .NET Core，它将下载适用于 .NET Core

的包

 <!--Trageting .NET CORE (2.1, 3.0) && .NET STANDARD (2.0,2.1) -->
  <ItemGroup Condition="$(TargetFramework.StartsWith('netcore')) OR $(TargetFramework.StartsWith('netstandard')) ">
    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
    <PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="5.2.7" />
    <!--<PackageReference Include="Microsoft.AspNet.WebApi.Core" Version="5.2.7" />-->
    <PackageReference Include="NLog.Extensions.Logging" Version="1.6.1" />
    <PackageReference Include="NLog.WindowsEventLog" Version="4.6.7" />
    <PackageReference Include="System.Diagnostics.EventLog" Version="4.6.0" />
    <PackageReference Include="System.Configuration.ConfigurationManager" Version="4.6.0" />
    <PackageReference Include="System.Data.SqlClient" Version="4.7.0" />
    <PackageReference Include="System.Linq" Version="4.3.0" />
    <PackageReference Include="Microsoft.Win32.Registry" Version="4.6.0" />
  </ItemGroup>
  
  <!--Targeting .NET FRAMEWORK (4.6.1 4.6.2)  -->
  <ItemGroup Condition="'$(TargetFramework)' == 'net461' OR '$(TargetFramework)' == 'net462'">
    <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
    <PackageReference Include="Microsoft.AspNet.WebApi.Client" version="5.2.3" />
    <PackageReference Include="Microsoft.AspNet.WebApi.Core" version="5.2.3" />
    <PackageReference Include="NLog.Extensions.Logging" Version="1.5.4" />
    <PackageReference Include="NLog.WindowsEventLog" Version="4.6.7" />
    <PackageReference Include="System.Diagnostics.EventLog" Version="4.5.0" />
    <PackageReference Include="System.Configuration.ConfigurationManager" Version="4.5.0" />
    <PackageReference Include="System.Data.SqlClient" Version="4.6.1" />
    <PackageReference Include="System.Linq" Version="4.3.0" />
    <PackageReference Include="Microsoft.Win32.Registry" Version="4.5.0" />
  </ItemGroup>

   <!--Targeting .NET FRAMEWORK (4.7, 4.7.1, 4.7.2)-->
  <ItemGroup Condition="'$(TargetFramework)' == 'net47' &#xD;&#xA; OR '$(TargetFramework)' == 'net471'&#xD;&#xA; OR '$(TargetFramework)' == 'net472'">
    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
    <PackageReference Include="Microsoft.AspNet.WebApi.Client" version="5.2.3" />
    <PackageReference Include="Microsoft.AspNet.WebApi.Core" version="5.2.3" />
    <PackageReference Include="NLog.Extensions.Logging" Version="1.5.4" />
    <PackageReference Include="NLog.WindowsEventLog" Version="4.6.7" />
    <PackageReference Include="System.Diagnostics.EventLog" Version="4.5.0" />
    <PackageReference Include="System.Configuration.ConfigurationManager" Version="4.5.0" />
    <PackageReference Include="System.Data.SqlClient" Version="4.6.1" />
    <PackageReference Include="System.Linq" Version="4.3.0" />
    <PackageReference Include="Microsoft.Win32.Registry" Version="4.5.0" />
  </ItemGroup>

有没有更好的方法来完成上面提到的代码，比如使用 DefineConstants？

Answer 1

如果您想要更改的是版本，它们具有一定的共性，那么我可能会想做类似的事情：

<PropertyGroup>
    <VersionWebApiClient>5.2.3</VersionWebApiClient>
    <VersionWebApiClient Condition="...todo...">5.2.7</VersionWebApiClient>
    <!-- ... for the other things ... -->
<PropertyGroup>
<ItemGroup>
    <PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="$(VersionWebApiClient)" />
    <!-- ... for the other things ... -->
</ItemGroup>

这个：

允许最常见的值是简单的默认值
允许明确覆盖每个目标框架
不复制实际的包引用

如何为一个库定位多个框架

How to target multiple frameworks for a library

c#

csproj

.net-core