Question

Short question, Is there a way in .NET 4.0 to take a string that represents the method body, and compile it into a Func/Action, or is there a library to do so?

查明:

我需要的是不会造成任何损失的东西,它必须是完全有活力的,如 j(Eval())。我需要在不造成损失的情况下,把扼杀变成一个富人/行动。

Answer 1

您可使用CSharpCodeProvider 类别将源代码编成一个组。

例如:

var compiler = new CSharpCodeProvider(new Dictionary<string, string> { { "CompilerVersion", "v4.0" } });
var options = new CompilerParameters { OutputAssembly = path);
var results = compiler.CompileAssemblyFromFile(options, sourceFile);

为了汇编单一功能,你可以用适当的<代码>(<>>>>使用的表格填写单一功能,以创建完整的源文档,然后通过反思获得代表:

var assembly = results.CompiledAssembly;
var method = assembly.GetType("WrapperClassName").GetMethod("MethodName");
var delegate = (Action)Delegate.CreateDelegate(typeof(Action), method);

https://stackoverflow.com/questions/3111190/compiling-net-code-in-net-4/3111228 全例:

static readonly Assembly[] References = new[] { typeof(Enumerable).Assembly, typeof(Component).Assembly };
public Action CompileMethodstring source) {
    var options = new CompilerParameters(References.Select(a => a.Location).ToArray()) {
        GenerateInMemory = true
    };
    string fullSource = @"public static class HolderClass { public static void Execute() { 
" + source + "
} }";
    try {
        var compiler = new CSharpCodeProvider(new Dictionary<string, string> { { "CompilerVersion", "v4.0" } });

        var results = compiler.CompileAssemblyFromSource(options, fullSource);

        if (results.Errors.Count > 0)
            throw new InvalidOperationException(String.Join(
                Environment.NewLine, 
                results.Errors.Cast<CompilerError>().Select(ce => ce.ErrorText)
            ));

        return (Action)Delegate.CreateDelegate(
            typeof(Action),
            results.CompiledAssembly.GetType("HolderClass").GetMethod("Execute")
        );
    } finally { options.TempFiles.Delete(); }
}

Answer 2

也可使用CS-cast.Net。它是根植的文字平台,也是你做的:

dynamic script = CSScript.LoadCode(@"using System;
                                     public class Script
                                     {
                                         public void SayHello(string greeting)
                                         {
                                             Console.WriteLine(greeting);
                                         }
                                     }")
                                    .CreateObject("*");
script.SayHello("Hello World!");

我在生产中使用了将近两年的时间,这一直是创造可喜用途的巨大途径。我有

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