如何获得的IDictionary＆LT;字符串，对象＆gt;称为在C＃中的参数previous方法？ [英] How to get a IDictionary<string, object> of the parameters previous method called in C#?

问题描述

我希望能够得到一个的IDictionary＆LT形式的参数列表，字符串，对象＆gt; 叫做previous方法。这里有一个陷阱：我不能使用第三方面向方面的编程框架，即使它是免费的。

I would like to be able to get a list of parameters in the form of a IDictionary<string, object> of the previous method called. There is one catch: I cannot make use of third-party Aspect Oriented Programming framework even when it's free.

例如：

using System;
using System.Collections.Generic;
using System.Diagnostics;

namespace Question {
    internal class Program {
        public static void Main(string[] args) {
            var impl = new Implementation();
            impl.MethodA(1, "two", new OtherClass { Name = "John", Age = 100 });
        }
    }

    internal class Implementation {
        public void MethodA(int param1, string param2, OtherClass param3) {
            Logger.LogParameters();
        }
    }

    internal class OtherClass {
        public string Name { get; set; }
        public int Age { get; set; }
    }

    internal class Logger {
        public static void LogParameters() {
            var parameters = GetParametersFromPreviousMethodCall();
            foreach (var keyValuePair in parameters)
                Console.WriteLine(keyValuePair.Key + "=" + keyValuePair.Value);
                // keyValuePair.Value may return a object that maybe required to
                // inspect to get a representation as a string.
        }

        private static IDictionary<string, object> GetParametersFromPreviousMethodCall() {
            throw new NotImplementedException("I need help here!");
        }
    }
}

任何建议或想法？随意使用反射，如果有必要的。

Any suggestion or ideas? Feel free to use reflection if necessary.

推荐答案

您可以使用的 堆栈跟踪 得到你所需要的：

You could use StackTrace to get all you need:

var trace = new System.Diagnostics.StackTrace();
var frame = trace.GetFrame(1); //previous
var method = frame.GetMethod();

现在你有一个 MethodBase 的实例。

您可以通过获取名称：

var method = method.Name;

和参数由 MethodBase.GetParameters 。

例如：

var dict = new Dictionary<string, object>();
foreach (var param in method.GetParameters())
{
    dict.Add(param.Name, param.DefaultValue);
}

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