我可以按类型获取 C# 委托的签名吗? [英] Can I get the signature of a C# delegate by its type?

问题描述

如果您有委托的类型信息，是否有一种直接的方法使用反射来获取委托的参数列表?

Is there a straightforward way using reflection to get at the parameter list for a delegate if you have its type information?

例如，如果我声明一个委托类型如下

For an example, if I declare a delegate type as follows

delegate double FooDelegate (string param, bool condition);

稍后获取该委托类型的类型信息，如下所示

and later get the type information for that delegate type as follows

Type delegateType = typeof(FooDelegate);

是否可以从该类型信息对象中检索返回类型 (double) 和参数列表 ({string, bool})?

Is it possible to retrieve the return type (double) and parameter list ({string, bool}) from that type info object?

推荐答案

    MethodInfo method = delegateType.GetMethod("Invoke");
    Console.WriteLine(method.ReturnType.Name + " (ret)");
    foreach (ParameterInfo param in method.GetParameters()) { 
        Console.WriteLine("{0} {1}", param.ParameterType.Name, param.Name);
    }

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