asp.net动态添加下拉列表框_asp.net

asp.net动态添加下拉列表框_超链接_02

.aspx代码如下：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Sample_01.aspx.cs" Inherits="Sample_01" %>

<!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></title>
    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h3>页面转向</h3>
        <p><span class ="spMemo">通过静态的超链接转向：</span>
            <a href ="http://www.51zxw.net" title="我要自学网">我要自学网</a>
        </p>

        <p ><span class="spMemo">动态创建的HyperLink超链接：</span> </p>
            <p class ="pLine"> <span >名称：</span>         <asp:TextBox ID="txt_name" runat="server"></asp:TextBox>   </p>
            <p class ="pLine"> <span >网址：</span>         <asp:TextBox ID="txt_url" runat="server" Width="300"></asp:TextBox>   </p>
            <p class="pLine">  <asp:Button ID="btn_addlink" runat="server" Text="添加新链接" 
                   /> 
                <asp:TextBox ID="txt_links" runat="server" Height="25px" Width="329px" Visible="false" ></asp:TextBox></p>
        <asp:Panel ID="pnl_links" runat="server">
        </asp:Panel>
        
       
            
    </div>
    </form>
</body>
</html>


.aspx.cs代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Sample_01 : System.Web.UI.Page
{


    //自定义函数，添加HyperLink
    protected void AddLink(string nameurl) {
        string[] _link = nameurl.Replace("\u0081", "").Split('\u0080');
        HyperLink hl= new HyperLink();
        hl.Text = _link[0];
        hl.NavigateUrl = _link[1];
        pnl_links.Controls.Add(hl);
    
    }



    protected void Page_Load(object sender, EventArgs e)
    {
        //这段程序，和上一节课最后的练习，构建checkbox的思路相同

        //动态创建超链接,从中转存储的TXT中读取
        if (txt_links.Text != "") { 
            //读取字符串，拆分成数组，每个成员包括名称和网址 
            string[] arrS_links = txt_links.Text.Split('\u0081');
            foreach (string s in arrS_links) {
                if (s.Length > 0) {//为什么要大于0才构建？因为拆分的时候会多一个数组成员为空字符串
                    //交给子函数
                    AddLink(s);
                }
            }
        }

        //判断是否有新值要添加：
        string _name, _url;
        _name = txt_name.Text; _url = txt_url.Text;

        if (_name != "" && _url != "") {
            string _addlinktxt = _name + "\u0080" + _url + "\u0081";
            AddLink(_addlinktxt);
            txt_links.Text += _addlinktxt;

            //清空文本框
            txt_name.Text = txt_url.Text = "";
        }



    }
    


    
}


效果如下：

asp.net动态添加下拉列表框_超链接_03