/Files/longren629/DelegateDemo.zip
1:操作类
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;
/// <summary>
/// Demo 的摘要说明
/// </summary>public class Demo{
内部变量 构造函数}2:页面
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>Delegate学习实例</title></head><body> <form id="form1" runat="server"> <asp:Button ID="Button1" runat="server" Text="添加成都同时利用Delegate添加四川" OnClick="Button1_Click" /> <br /> <asp:Button ID="Button2" runat="server" Text="移除四川同时利用Delegate移除成都" OnClick="Button2_Click" /><br /> <asp:ListBox ID="ListBox1" runat="server" Width="330px" Height="328px"></asp:ListBox> </form></body></html>3,页面代码隐藏类
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e)
{
} protected void Button1_Click(object sender, EventArgs e) { Demo bll = new Demo("四川", "成都"); bll.AddTown += new Demo.AddTownDelegate(AddProvince); this.ListBox1.Items.Add(bll.Town); bll.AddNewTown(); } protected void AddProvince(string Province) { this.ListBox1.Items.Add(Province); } protected void RemovedCity(string City) { this.ListBox1.Items.Remove(new ListItem(City)); } protected void Button2_Click(object sender, EventArgs e) { Demo bll = new Demo("四川", "成都"); bll.RemoveProvince += new Demo.RemoveProvinceDelegate(RemovedCity); this.ListBox1.Items.Remove(new ListItem(bll.Province)); bll.RemoveOldProvince(); }}