利用反射绑定事件处理程序(C#)

传统的写法：强类型的情况下

using System;
using System.Collections.Generic;
using System.Text;

using System.Reflection;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            Customer c = new Customer();
            c.OnChange += new EventHandler(c_OnChange);

            c.Change();
            Console.Read();

        }

        static void c_OnChange(object sender, EventArgs e)
        {
            Console.WriteLine("事件被触发了");
        }
    }

    class Customer
    {
        public event EventHandler OnChange;
        public void Change()
        {
            if (OnChange != null)
                OnChange(this, null);
        }
    }
}

值得了解的另外一个写法

using System;
using System.Collections.Generic;
using System.Text;

using System.Reflection;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            Customer c = new Customer();
            EventInfo evt = c.GetType().GetEvent("OnChange",
                    BindingFlags.NonPublic | BindingFlags.Instance
                    | BindingFlags.Public
                );

            evt.AddEventHandler(c, new EventHandler(c_OnChange));

            c.Change();
            Console.Read();

        }

        static void c_OnChange(object sender, EventArgs e)
        {
            Console.WriteLine("事件被触发了");
        }
    }

    class Customer
    {
        public event EventHandler OnChange;
        public void Change()
        {
            if (OnChange != null)
                OnChange(this, null);
        }
    }
}