一、簡單的自定義事件(1)：無參數

namespace UserInputMonitor

{

??? class UserInputMonitor

??? {

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

??????? //定義委托

??????? public event UserRequest OnUserRequest;

??????? //此委托類型類型的事件

????? ??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);

??????????? //注意這種寫法是錯誤的，因為委托是靜態的

??????? }

??? }

}

二、簡單的自定義事件(2):包含參數

class MyEventArgs:EventArgs

{

??? private string keyChars;

???

??? public MyEventArgs(string keyChars)

??? {

??????? this.keyChars = keyChars;

??? }

???

??? public string KeyChars

??? {

??????? get

??????? {

??????????? return keyChars;

??????? }

??? }

}

class UserInputMonitor

{

??? //定義委托

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

??? //此委托類型類型的事件，用戶累加客戶端事件

??? public event UserRequest OnUserRequest;

??? public void Run() //定義此事件激發的條件

??? {

??????? 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);

????????? //注意這種寫法是錯誤的，因為委托是靜態的

???? }

}

轉載于:https://www.cnblogs.com/qqhfeng/archive/2010/02/26/1674102.html

總結

以上是生活随笔為你收集整理的浅析C#的事件处理和自定义事件的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。