System.Net.Http与Microsoft.Net.Http [英] System.Net.Http vs Microsoft.Net.Http

问题描述

我正在使用ASP.NET Core.我想使用HttpClient，但是我注意到提供了两个NuGet软件包.我该使用哪一个?

I am using ASP.NET Core. I want to use HttpClient but I noticed that there are two NuGet packages being offered. Which one do I use?

• System.Net.Http
• Microsoft.Net.Http

• System.Net.Http
• Microsoft.Net.Http

推荐答案

取决于版本.旧的System.Net.Http软件包( 2.0 的软件包)是旧版根据以下说明不推荐使用 Microsoft.Http.Net 的软件包:

Depends on the version. The old System.Net.Http packages (the 2.0 ones) are legacy packages which are deprecated in favor of Microsoft.Http.Net according to the description:

旧版软件包System.Net.Http现在包含在 "Microsoft.Net.Http"包.

Legacy package, System.Net.Http is now included in the 'Microsoft.Net.Http' package.

它们存在是为了在.NET以前的版本和可移植类库中提供HttpClient.在这种情况下，您应该使用Microsoft.Net.Http.

They exist to provide the HttpClient in previous .NET versions and Portable Class libraries. You should use Microsoft.Net.Http in that case.

由于使用的是.NET Core，因此应使用最新的 System.Net.Http 包(例如4.3.3).

Since you're using .NET Core, you should use the latest System.Net.Http package (eg. 4.3.3).

已针对csproj更新

从.NET Standard 2.0开始，System.Net.HttpClient程序包已经包含并且在您定位netstandard2.0时可用.如果出于某些原因仍要为完整的.NET和.NET Core都引用它，则可以将其添加到csproj文件中:

As of .NET Standard 2.0, the System.Net.HttpClient package is already included and available when you target netstandard2.0. If for some reason you still want to reference it for both full .NET and .NET Core you can add this to your csproj file:

<ItemGroup Condition=" '$(TargetFramework)' == 'net461' ">
    <!-- // HttpClient for full .NET -->
    <Reference Include="System.Net.Http" />
</ItemGroup>
<ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
    <!-- // HttpClient for .NET Core -->
    <PackageReference Include="System.Net.Http" Version="4.3.3" />
</ItemGroup>

---

如果您使用的是project.json

如果project.json同时面向完整的.NET和.NET Core，则必须将System.Net.Http程序集添加到frameworkAssemblies元素.例如:

If your project.json targets both full .NET and .NET Core, you have to add the System.Net.Http assembly to the frameworkAssemblies element. For example:

"frameworks": {
  "net451": {
    "frameworkAssemblies": {
      "System.Net.Http": "4.0.0.0" // HttpClient for full .NET
    }
  },
  "netstandard1.3": {
    "dependencies": {
      "System.Net.Http": "4.1.0", // HttpClient for .NET Core
    }
  }
}

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