我在上一篇文章(
C#编程之委托与事件(一) )中通过示例结合的方法介绍了委托,在本文中,我同样以代码示例的方式来介绍C#里的事件机制。
二、事件
1.了解概念
事件就是当对象或类状态发生改变时,对象或类发出的信息或通知。发出信息的对象或类称为"事件源",对事件进行处理的方法称为"接收者",通常事件源在发出状态改变信息时,它并不知道由哪个事件接收者来处理.这就需要一种管理机制来协调事件源和接收者,C++中通过函数指针来完成的.在C#中事件使用委托来为触发时将调用的方法提供类型安全的封装。
在介绍事件之前我们先来了解几个事件的基本概念和几个重要素:
--事件的本质
-事件是特殊的委托实例
-事件关键字:event
--事件的四个要素:
-定义事件
-激发事件
-监听事件
-执行事件
2.事件分析
在.NET中,很多控件都有相关的事件,如Button的Click事件,它能响应鼠标的单击事件。
--定义事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
public delegate void EventHandler(object sender,EventArgs e);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
public event EventHandler Click;
--激发事件:单击鼠标
--监听事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
this.button1.Click+=new EventHandler(this.button1_Click);
--执行事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
public void button1_Click(object sender,EventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
//
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
实现略
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
}
上面这个button的Click事件是我们最常见的,这里展示出了整个事件过程。接下来我们来看看一个简单的事件实例。
3.简单实例--怎样定义一个完整的事件机制
一.定义委托
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
//定义事件委托
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
public delegate void ChangedEventHandler(object sender, EventArgs e);
二.定义事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
//定义一个委托类型事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
public event ChangedEventHandler Changed;
三.触发事件
四.侦听事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
MyText myText = new MyText();
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
myText.Changed += new MyText.ChangedEventHandler(myText_Chenged);
五.事件处理程序
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
//事件处理程序
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
private static void myText_Chenged(object sender, EventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
Console.WriteLine("Text属性的值改变:{0}", ((MyText)sender).Text);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydEZibVF1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
}
这就完成了一个完整的事件机制,详细代码如下:
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
MyText
1
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
using System;
2
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
using System.Collections.Generic;
3
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
using System.Text;
4
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
5
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
namespace EventExample1
6
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
7
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public class MyText
8
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
9
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//定义事件委托
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public delegate void ChangedEventHandler(object sender, EventArgs e);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//定义一个委托类型事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public event ChangedEventHandler Changed;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//用于触发Changed事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
protected virtual void OnChanged(EventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
if (this.Changed != null)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
this.Changed(this, e);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private string _text = string.Empty;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public string Text
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSVGRXSkNiRzlqYXk1bmFXWT0uanBn.jpg?w=700&webp=1)
get
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{ return this._text; }
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
set
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
this._text = value;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
this.OnChanged(new EventArgs());
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydEZibVF1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
Program
1
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
using System;
2
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
using System.Collections.Generic;
3
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
using System.Text;
4
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
5
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
namespace EventExample1
6
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
7
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
class Program
8
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
9
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
static void Main(string[] args)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
MyText myText = new MyText();
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
myText.Changed += new MyText.ChangedEventHandler(myText_Chenged);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
string str = string.Empty;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
while (str != "exit")
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
Console.Write("请输入一个字符串:");
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
str = Console.ReadLine();
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
myText.Text = str;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//事件处理程序
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private static void myText_Chenged(object sender, EventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
<%2
4.实例解说
现在我们需要设计一个电子邮件程序,当收到电子邮件时,希望将该消息转发到传真机(Fax)和手机(CallPhone);
一.我们需要传递消息则需要定义事件传递的消息类吧,定义如下:
1
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
namespace EventEmail
2
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
3
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//事件传递的消息定义
4
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public class MailMsgEventArgs:EventArgs
5
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
6
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public readonly string from, to, subject, body;
7
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
8
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public MailMsgEventArgs(string from, string to, string subject, string body)
9
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
this.from = from;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
this.to = to;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
this.subject = subject;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
this.body = body;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydEZibVF1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
}
二.定义委托及事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
public delegate void MailMsgEventHandler(object sender,MailMsgEventArgs e);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
public event MailMsgEventHandler MailMsg;
完整代码定义如下:
1
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
namespace EventEmail
2
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
3
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//定义一委托
4
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public delegate void MailMsgEventHandler(object sender,MailMsgEventArgs e);
5
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
6
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public class MailManager
7
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
8
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public event MailMsgEventHandler MailMsg; //委托类型的事件
9
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
protected virtual void OnMailMsg(MailMsgEventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
if (this.MailMsg != null)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
MailMsg(this, e);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//通过事件传递消息
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public void SimulateArrivingMsg(string from, string to, string subject, string body)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
MailMsgEventArgs e = new MailMsgEventArgs(from, to, subject, body);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
OnMailMsg(e);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydEZibVF1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
}
三 .传真和手机的定义:
1
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
namespace EventEmail
2
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
3
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSVGRXSkNiRzlqYXk1bmFXWT0uanBn.jpg?w=700&webp=1)
/**//// <summary>
4
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
/// 传真机
5
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
/// </summary>
6
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public class Fax
7
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
8
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private TextBox _tBox;
9
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public Fax(MailManager mm, TextBox tBox)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//监听事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//这里的FaxMsg,指的是符合MailMsgEventHandler委托的方法,也就是激发事件后所执行的方法
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
mm.MailMsg += new MailMsgEventHandler(FaxMsg);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
_tBox = tBox;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private void FaxMsg(Object sender, MailMsgEventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
_tBox.Text += string.Format("消息到传真:{4}来自:{0}{4}发到:{1}{4}主题:{2}{4}内容:{3}{4}{4}", e.from, e.to, e.subject, e.body, Environment.NewLine);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public void Register(MailManager mm)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
mm.MailMsg += new MailMsgEventHandler(FaxMsg);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public void UnRegister(MailManager mm)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
//注销事件
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
mm.MailMsg -= new MailMsgEventHandler(FaxMsg);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydEZibVF1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
}
-----------------------------------------------------------------------------------------------------------
1
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
namespace EventEmail
2
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
3
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSVGRXSkNiRzlqYXk1bmFXWT0uanBn.jpg?w=700&webp=1)
/**//// <summary>
4
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
/// 手机
5
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
/// </summary>
6
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public class CallPhone
7
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
8
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private TextBox _tBox;
9
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public CallPhone(MailManager mm, TextBox tBox)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
mm.MailMsg += new MailMsgEventHandler(CellPhoneMsg);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
_tBox = tBox;
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private void CellPhoneMsg(Object sender, MailMsgEventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
_tBox.Text += string.Format("消息到手机:{4}来自:{0}{4}发到:{1}{4}主题:{2}{4}内容:{3}{4}{4}", e.from, e.to, e.subject, e.body,Environment.NewLine);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public void Register(MailManager mm)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
mm.MailMsg += new MailMsgEventHandler(CellPhoneMsg);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public void UnRegister(MailManager mm)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
mm.MailMsg -= new MailMsgEventHandler(CellPhoneMsg);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydEZibVF1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
}
四.客户端调用
上面的逻辑处理完毕,下面来看看调用情况:
1
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDA1dmJtVXVaMmxtLmpwZw%3D%3D.jpg?w=700&webp=1)
namespace EventEmail
2
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrUW14dlkydFRkR0Z5ZEM1bmFXWT0uanBn.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBOdmJuUnlZV04wWldSQ2JHOWpheTVuYVdZPS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
3
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public partial class Form1 : Form
4
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
5
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private Fax fax = null;
6
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private CallPhone cell = null;
7
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private MailManager mm = null;
8
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
public Form1()
9
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
InitializeComponent();
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
mm = new MailManager();
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
fax = new Fax(mm, txtReceiver);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
cell = new CallPhone(mm, txtReceiver);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private void Form1_Load(object sender, EventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private void btnSend_Click(object sender, EventArgs e)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRUZEdGeWRDNW5hV1k9LmpwZw%3D%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlrYjNRdVoybG0uanBn.jpg?w=700&webp=1)
{
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
mm.SimulateArrivingMsg(txtFrom.Text, txtTo.Text, txtSubject.Text, txtBody.Text);
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBWNGNHRnVaR1ZrVTNWaVFteHZZMnRGYm1RdVoybG0uanBn.jpg?w=700&webp=1)
}
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
![C#编程之委托与事件四(二)【转】 C#编程之委托与事件四(二)【转】](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdmQzZDNMbU51WW14dlozTXVZMjl0TDBsdFlXZGxjeTlQZFhSc2FXNXBibWRKYm1ScFkyRjBiM0p6TDBsdVFteHZZMnN1WjJsbS5qcGc%3D.jpg?w=700&webp=1)
private void btnClear_Click(object sender, EventArgs e)
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{
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this.txtReceiver.Text = "";
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}
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}
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}
5 .事件的意义
--有利于消息的传播
--有利于模块之间的松散耦合
注:什么是松散耦合?
就以上面电子邮件程序为例。
--如果没有事件机制,在发送邮件时,就需要去调用Fax,CellPhone的相关方法;
--采用事件机制,在发送邮件时,仅许激发邮件管理器的事件既可,与Fax和CellPhone无关;
也就是说,邮件管理器和Fax、CellPhone之间的依赖关系被解除了。
本文就简单的介绍于此,上面看不太明白的可下示例程序了解;
示例程序在载:EventDemo.rar
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注: 文章转载自: http://beniao.cnblogs.com/ 或 http://www.cnblogs.com/ 作者 : Beniao