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);

        }

    }

}