再谈方法的动态调用

下面代码是今天课程中,有朋友上台做即席演讲时举的一个例子.这个例子不错,概括了动态调用方法的几种情况,包括静态方法,实例方法,方法重载等等

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //MyClass obj = new MyClass();
            //Call(obj, "MethodString", "helloworld");
            //Call(obj, "MethodInt", 1,2);
            //Call(obj, "MethodInt", 1, 2 ,3);
            //Call(obj, "MethodNull");
            //Call(obj, "MethodStatic", "string", 123);
            Call(typeof(StaticClass), "MethodStatic", "string", 123);

            Console.Read();
        }

        static void Call(object obj, string MethodName, params object[]parameters)
        {
            Type[] types = Array.ConvertAll(parameters, s => s.GetType());
            MethodInfo mi = obj.GetType().GetMethod(MethodName, types);
            if (mi == null) return;
            mi.Invoke(obj,parameters);
            //Type[] types= new Type[parameters.l]
        }

        static void Call(Type type, string MethodName, params object[] parameters)
        {
            Type[] types = Array.ConvertAll(parameters, s => s.GetType());
            MethodInfo mi = type.GetMethod(MethodName, types);
            if (mi == null) return;
            mi.Invoke(null, parameters);
            //Type[] types= new Type[parameters.l]
        }
    }

    public class MyClass
    {
        public void MethodString(string str)
        {
            Console.WriteLine("string:{0}",str);
        }

        public void MethodInt(int int1, int int2)
        {
            Console.WriteLine("int:{0}", int1 + int2);
        }

        public void MethodInt(int int1, int int2, int int3)
        {
            Console.WriteLine("int:{0}", int1 + int2 + int3);
        }

        public void MethodNull()
        {
            Console.WriteLine("Null");
        }

        public static void MethodStatic(string str, int integer)
        {
            Console.WriteLine("static:{0} {1}", str, integer);
        }
    }
    class StaticClass
    {
        public static void MethodStatic(string str, int integer)
        {
            Console.WriteLine("static:{0} {1}", str, integer);
        }
    }
}