如何在 VS2017 final 中定位多个框架? [英] How to target multiple frameworks in VS2017 final?

问题描述

对于 ASP.NET Core，我可以在一个 Project.json 中针对多个框架(例如 netcoreapp1.1 和 dnx451):

For ASP.NET Core I could target multiple frameworks (for example netcoreapp1.1 and dnx451) in one Project.json:

"frameworks": {
   "netcoreapp1.1": {
     "dependencies": {
       "Microsoft.NETCore.App": {
         "version": "1.1.0",
         "type": "platform"
       }
     },
     "imports": [
       "dotnet5.6",
       "portable-net45+win8"
     ]
   },
   "dnx451": {}
 },

在 Visual Studio 2017 的最终版本中，我只能针对 netcoreapp1.1 或 dnx451，但我认为无法同时针对两者.

In the final Version of Visual Studio 2017 I can only target either netcoreapp1.1 or dnx451, but I see no way to target both.

我尝试通过设置 <TargetFramework>netcoreapp1.1;dnx451</TargetFramework> 甚至 <TargetFrameworks>netcoreapp1 来直接编辑 csproj 文件以添加第二个框架.1;dnx451</TargetFrameworks> 但由于框架不受支持而在 Visual Studio 中出现错误.

I tried editing the csproj-file directly to add a 2nd Framework by Setting either <TargetFramework>netcoreapp1.1;dnx451</TargetFramework> or even <TargetFrameworks>netcoreapp1.1;dnx451</TargetFrameworks> but get Errors in Visual Studio due to unsupported frameworks.

那么在 Visual Studio 2017 的最终版本中，如何在一个项目中同时定位 netcoreapp1.1 和 dnx451?

So how Do I target both netcoreapp1.1 and dnx451 in one project in the final version of Visual Studio 2017?

推荐答案

您需要更改一些内容.首先，<TargetFrameworks> 标签是多目标的正确标签，; 是分隔符.

There will be a few things you need to change. First the <TargetFrameworks> tag is the correct one for multi targeting and ; is the separator.

DNX 在 RC2 的开发过程中被弃用，所以支持 DNX 的最后一个版本是 RC1.dnxcore5x(以及后来的 dotnet5.x)名字被替换为 netstandard1.x(用于类库)和 netcoreapp1.x 用于应用程序.dnx4xx 已被整体弃用，应该使用 net4xx.

DNX was deprecated during development of RC2, so last version which supported DNX was RC1. The dnxcore5x (and later dotnet5.x) moniker got replaced with netstandard1.x (for Class libraries) and netcoreapp1.x for applications. dnx4xx got deprecated as a whole and net4xx should be used.

此外，当您面向 .NET Framework(单独或与 .NET Core/NetStandard 一起)时，您将需要定义运行时标识符:

Additionally, when you target .NET Framework (alone or with .NET Core/NetStandard), you will need to define a runtime identifier:

<RuntimeIdentifier>win7-x86</RuntimeIdentifier>

或

<RuntimeIdentifier>win7-x64</RuntimeIdentifier>

或者你想成为默认值的任何一个.

Or whichever you want to be the default.

仅作为附加信息.当您针对多个平台时，您需要使用条件来解析包，即 Condition="'$(TargetFramework)' == '<targetmoniker>'

Just as an additional information. When you target more than one platform, you need to use conditionals for package resolution, i.e. Condition="'$(TargetFramework)' == '<targetmoniker>'

<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp1.1'">
    <PackageReference Include="Microsoft.NETCore.App">
      <Version>1.0.1</Version>
    </PackageReference>
</ItemGroup>

否则可能会出现包还原错误

Otherwise you may get package restore errors

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