.Net Core 1.0中的运行时编译和运行代码 [英] Compiling and Running code at runtime in .Net Core 1.0

问题描述

是否可以在新的.Net Core（更好的.Net Standard Platform）中在运行时编译和运行C＃代码？我已经看到了一些示例（.Net Framework），但是它们使用了与netcoreapp1.0（.NETCoreApp，Version = v1.0）不兼容的NuGet软件包

Is it possible to compile and run C# code at runtime in the new .Net Core (better .Net Standard Platform)? I have seen some examples (.Net Framework), but they used NuGet packages that are not compatible with netcoreapp1.0 (.NETCoreApp,Version=v1.0)

推荐答案

选项＃1 ：使用完整的C＃编译器编译程序集，加载程序集，然后从中执行方法。

Option #1: Use the full C# compiler to compile an assembly, load it and then execute a method from it.

这需要以下软件包作为project.json中的依赖项：

This requires the following packages as dependencies in your project.json:

"Microsoft.CodeAnalysis.CSharp": "1.3.0-beta1-20160429-01",
"System.Runtime.Loader": "4.0.0-rc2-24027",

然后您可以使用如下代码：

Then you can use code like this:

var compilation = CSharpCompilation.Create("a")
    .WithOptions(new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary))
    .AddReferences(
        MetadataReference.CreateFromFile(typeof(object).GetTypeInfo().Assembly.Location))
    .AddSyntaxTrees(CSharpSyntaxTree.ParseText(
        @"
using System;

public static class C
{
    public static void M()
    {
        Console.WriteLine(""Hello Roslyn."");
    }
}"));

var fileName = "a.dll";

compilation.Emit(fileName);

var a = AssemblyLoadContext.Default.LoadFromAssemblyPath(Path.GetFullPath(fileName));

a.GetType("C").GetMethod("M").Invoke(null, null);

选项＃2 ：使用Roslyn脚本，这将导致更简单的代码，但当前需要更多设置：

Option #2: Use Roslyn Scripting. This will result in much simpler code, but currently requires more setup:

• 创建NuGet.config可以从Roslyn夜间供稿中获取软件包：

  
  
  

• Create NuGet.config to get packages from the Roslyn nightly feed:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
    <add key="Roslyn Nightly" value="https://www.myget.org/F/roslyn-nightly/api/v3/index.json" />
  </packageSources>
</configuration>

将以下软件包作为依赖项添加到project.json（注意，这是从今天开始的软件包，您需要ent版本）：

Add the following package as a dependency to project.json (notice that this is package from today, you will need different version in the future):

"Microsoft.CodeAnalysis.CSharp.Scripting": "1.3.0-beta1-20160530-01",

您还需要导入 dotnet （已过时的 Target Framework Moniker，尽管如此，罗斯林仍然使用）：

You also need to import dotnet (obsolete "Target Framework Moniker", which is nevertheless still used by Roslyn):

"frameworks": {
  "netcoreapp1.0": {
    "imports": "dotnet5.6"
  }
}

现在您终于可以使用脚本了：

Now you can finally use Scripting:

CSharpScript.EvaluateAsync(@"using System;Console.WriteLine(""Hello Roslyn."");").Wait();

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