回调函数

Javascript

function person(text,callback) {
alert(text);
callback(text).apply();

}

function person_callback(text)

{
alert('person: ' +text + '_callback');
}

function computer_callback(text)
{
alert('computer: ' + text + '_callback');
}

person('hello',computer_callback)

========================================================

C#

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

namespace App
{
public delegate void CallbackHandler(string text);

public class Person
{
public void Say(string text, CallbackHandler handler)
{
Console.WriteLine(text);

handler.Invoke(text + "_callback");
}

public void Say_Callback(string text)
{
Console.WriteLine("person: " + text);
}
}

public class Computer
{
public void Say_Callback(string text)
{
Console.WriteLine("computer: " + text);
}
}

class Program
{
static void Main(string[] args)
{
Person p = new Person();

CallbackHandler personHandler = new CallbackHandler((new Person()).Say_Callback);
CallbackHandler computerHandler = new CallbackHandler((new Computer()).Say_Callback);
p.Say("hello", personHandler);
p.Say("hello", computerHandler);

}

}
}