Learning hard C#学习笔记——读书笔记 08 - ToB企服应用市场:ToB评测及商务社交产业平台

// event关键字委托类型
public event EventHandler birthday

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访问修饰符 event 委托类型事件名称

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public class Bridegroom {
// 1.自定义委托
public delegate void EventHandler(string msg);
// 2.自定义事件
public event EventHandler MarryEvent;
// 3.发出事件
public void OnMarringComing(string msg) {
// 4.判断是否绑定了事件处理方法
if (MarryEvent != null) {
// 5.触发事件
MarryEvent(msg);
}
}
public static void Main(string[] args) {
Bridegroom bridegroom = new Bridegroom();
Friend friend1 = new Friend("张三");
Friend friend2 = new Friend("李四");
Friend friend3 = new Friend("王五");
// 添加事件的订阅者
/*
这里是给MarryEvent这个事件，绑定委托链
委托链的增加和减少使用的就是 +、-
*/
bridegroom.MarryEvent += new EventHandler(friend1.sendMessage);
bridegroom.MarryEvent += new EventHandler(friend2.sendMessage);
// 发出事件
Console.WriteLine("===============================");
bridegroom.OnMarringComing("朋友们，我结婚了！");
bridegroom.OnMarringComing("朋友们，我结婚了！");
Console.Read();
}
}
public class Friend {
private string name;
public string Name { get { return this.name; } set { this.name = value; } }
public Friend(string name)
{
this.name = name;
}
public void sendMessage(string message) {
Console.WriteLine(message);
Console.WriteLine(this.Name+"收到了消息");
}
}

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public class Bridegroom
{
// 2.自定义事件
public event EventHandler MarryEvent;
// 3.发出事件
public void OnMarringComing(string msg)
{
// 4.判断是否绑定了事件处理方法
if (MarryEvent != null)
{
Console.WriteLine(msg);
// 5.触发事件
MarryEvent(msg,new EventArgs());
}
}
public static void Main(string[] args)
{
Bridegroom bridegroom = new Bridegroom();
Friend friend1 = new Friend("张三");
Friend friend2 = new Friend("李四");
Friend friend3 = new Friend("王五");
// 添加事件的订阅者
/*
这里是给MarryEvent这个事件，绑定委托链
委托链的增加和减少使用的就是 +、-
*/
bridegroom.MarryEvent += new EventHandler(friend1.sendMessage);
bridegroom.MarryEvent += new EventHandler(friend2.sendMessage);
// 发出事件
bridegroom.OnMarringComing("朋友们，我结婚了！");
Console.WriteLine("===============================");
Console.Read();
}
}
public class Friend
{
private string name;
public string Name { get { return this.name; } set { this.name = value; } }
public Friend(string name)
{
this.name = name;
}
public void sendMessage(object obj,EventArgs args)
{
Console.WriteLine(this.Name + "收到了消息");
}
}

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public class MarryArgs : EventArgs {
public string Message;
public MarryArgs(string message)
{
this.Message = message;
}
}
public class Bridegroom
{
public delegate void MarryEventHandler(object obj, MarryArgs e);
// 2.自定义事件
public event MarryEventHandler MarryEvent;
// 3.发出事件
public void OnMarringComing(string msg)
{
// 4.判断是否绑定了事件处理方法
if (MarryEvent != null)
{
// 5.触发事件
MarryEvent(this,new MarryArgs(msg));
}
}
public static void Main(string[] args)
{
Bridegroom bridegroom = new Bridegroom();
Friend friend1 = new Friend("张三");
Friend friend2 = new Friend("李四");
Friend friend3 = new Friend("王五");
// 添加事件的订阅者
/*
这里是给MarryEvent这个事件，绑定委托链
委托链的增加和减少使用的就是 +、-
*/
bridegroom.MarryEvent += new MarryEventHandler(friend1.sendMessage);
bridegroom.MarryEvent += new MarryEventHandler(friend2.sendMessage);
// 发出事件
bridegroom.OnMarringComing("朋友们，我结婚了！");
Console.WriteLine("===============================");
bridegroom.MarryEvent -= new MarryEventHandler(friend2.sendMessage);
bridegroom.MarryEvent += new MarryEventHandler(friend3.sendMessage);
bridegroom.OnMarringComing("朋友们，我结婚了！");
Console.Read();
}
}
public class Friend
{
private string name;
public string Name { get { return this.name; } set { this.name = value; } }
public Friend(string name)
{
this.name = name;
}
public void sendMessage(object obj,MarryArgs args)
{
Console.WriteLine(args.Message);
Console.WriteLine(this.Name + "收到了消息");
}
}

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public class Program {
public delegate void MarryHandler(string msg);
public event MarryHandler OnMarry;
static void Main(string[] args) {
Console.WriteLine("Line");
}
}

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