委托调用

来源：互联网发布：node inspector 编辑：程序博客网时间：2024/06/10 21:39

test1.aspx.cs

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class test1 : System.Web.UI.Page
{
    /// <summary>
    /// 申明委托，在包里或者类里，public
    /// </summary>
    /// <param name="strUrl">url地址</param>
    /// <param name="strTitle">连接标题</param>
    /// <returns></returns>
    public delegate string DelegateSampleSum(string strUrl, string strTitle);
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btn_delegateTest_Click(object sender, EventArgs e)
    {
        //利用委托调用函数 appendString
        DelegateSampleSum deTest = new DelegateSampleSum(appendString);
        lbl_show.Text = deTest("http://www.my400800.cn", "400电话");
    }
    /// <summary>
    /// 定义调用委托的函数，在呼叫者里要有委托的实例（呼叫者扔出一个委托，被呼叫者给这个委托赋值）
    /// </summary>
    /// <param name="addNum"></param>
    /// <returns></returns>
    public string appendString(string strUrl, string strTitle)
    {
        string strRet = "";
        strRet = string.Concat("<a href=/"", strUrl, "/">", strTitle, "</a>");
        return strRet;

    }
}

test1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test1.aspx.cs" Inherits="test1" %>

<!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 id="Head1" runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

        <asp:Label ID="lbl_show" runat="server" Text="显示处理结果"></asp:Label>
        <br />
        <br />
        <br />
        <asp:Button ID="btn_delegateTest" runat="server"
            onclick="btn_delegateTest_Click" Text="c#委托测试" />

    </div>
    </form>
</body>
</html>