第15章 .NET中的反射

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

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            //TestClass.ShowMsg();
            //TestClass.ShowMsg(new Message());

            //Assembly asm = Assembly.GetExecutingAssembly();
            //Object obj=asm.CreateInstance("ConsoleApplication2.Calculator",true);
            //Calculator cal=(Calculator)obj;

            //Object[] parameters = new Object[2] { 3, 5 };
            //Object obj1 = asm.CreateInstance("ConsoleApplication2.Calculator", true, BindingFlags.Default, null, parameters, null, null);
            //Calculator cal = (Calculator)obj1;

            //Type t = typeof(Calculator);
            //Calculator cal = new Calculator(3, 5);
            //int result = (int)t.InvokeMember("Add", BindingFlags.InvokeMethod, null, cal, null);
            //Console.WriteLine("result:" + result);

            //Type t = typeof(Calculator);
            //Object[] parameters = new Object[2] { 3, 5 };
            //t.InvokeMember("Add", BindingFlags.InvokeMethod, null, t, parameters);

            //Type t = typeof(Calculator);
            //Calculator cal = new Calculator(3, 5);
            //MethodInfo mi = t.GetMethod("Add", BindingFlags.Public | BindingFlags.Instance);
            //mi.Invoke(cal, null);

            //Type t = typeof(Calculator);
            //Object[] parameters = new Object[2] { 6, 9 };
            //MethodInfo mi = t.GetMethod("Add", BindingFlags.Public | BindingFlags.Static);
            //mi.Invoke(null, parameters);

            Console.ReadKey();
        }
    }

    public class Message { }

    public class TestClass
    {
        [Obsolete("请使用新方法")]
        public static void ShowMsg()
        {
            Console.WriteLine("旧MSG");
        }

        public static void ShowMsg(Message msg)
        {
            Console.WriteLine("新MSG");
        }
    }

    public class Calculator
    {
        private int x;
        private int y;
        public Calculator()
        {
            x = 0;
            y = 0;
            Console.WriteLine("Calculate()");
        }

        public Calculator(int x, int y)
        {
            this.x = x;
            this.y = y;
            Console.WriteLine("Calculate(int x, int y)");
        }

        public int Add()
        {
            int total = 0;
            total = x + y;
            Console.WriteLine("invoke instance method");
            Console.WriteLine(string.Format("{0}+{1}={2}", x, y, total));
            return total;
        }

        public static void Add(int x, int y)
        {
            int total = x + y;
            Console.WriteLine("invoke static method");
            Console.WriteLine(string.Format("{0}+{1}={2}", x, y, total));
        }
    }
}