一、简单的自定义事件(1)：无参数

namespace UserInputMonitor

{

class UserInputMonitor

{

public delegate void UserRequest(object sender, EventArgs e);

//定义委托

public event UserRequest OnUserRequest;

//此委托类型类型的事件

public void Run()

{

bool finished = false;

do

{

if (Console.ReadLine() == "h")

{

OnUserRequest(this, new EventArgs());

}

else if (Console.ReadLine() == "e")

{

finished = true;

}

} while (!finished);

}

}

public class Client

{

public static void Main()

{

UserInputMonitor monitor = new UserInputMonitor();

new Client(monitor);

monitor.Run();

}

private void ShowMessage(object sender, EventArgs e)

{

Console.WriteLine("HaHa!!");

}

Client(UserInputMonitor m)

{

m.OnUserRequest += new UserInputMonitor.UserRequest(this.ShowMessage);

//m.OnUserRequest+=new m.UserRequest(this.ShowMessage);

//注意这种写法是错误的，因为委托是静态的

}

}

}

二、简单的自定义事件(2):包含参数

class MyEventArgs:EventArgs

{

private string keyChars;

public MyEventArgs(string keyChars)

{

this.keyChars = keyChars;

}

public string KeyChars

{

get

{

return keyChars;

}

}

}

class UserInputMonitor

{

//定义委托

public delegate void UserRequest(object sender,MyEventArgs e);

//此委托类型类型的事件，用户累加客户端事件

public event UserRequest OnUserRequest;

public void Run() //定义此事件激发的条件

{

bool finished=false;

do

{

string inputString= Console.ReadLine();

if (inputString != "")

OnUserRequest(this, new MyEventArgs(inputString));

else

finished = true;

}while(!finished);

}

}

public class Client

{

public static void Main()

{

UserInputMonitor monitor=new UserInputMonitor();

new Client(monitor);

monitor.Run();

}

private void ShowMessage(object sender,MyEventArgs e)

{

Console.WriteLine("捕捉到：{0}",e.KeyChars);

}

Client(UserInputMonitor m)

{

m.OnUserRequest+=new UserInputMonitor.UserRequest(this.ShowMessage);

//m.OnUserRequest+=new m.UserRequest(this.ShowMessage);

//注意这种写法是错误的，因为委托是静态的

}

}