后台代码：
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;using System.Text.RegularExpressions;using System.Net;using System.IO;using System.Collections;
public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { } }
protected void Button1_Click(object sender, EventArgs e) { TextBox2.Text = ""; string web_url = this.TextBox1.Text;//"http://blog.csdn.net/21aspnet/" string all_code = ""; HttpWebRequest all_codeRequest = (HttpWebRequest)WebRequest.Create(web_url); WebResponse all_codeResponse = all_codeRequest.GetResponse(); StreamReader the_Reader = new StreamReader(all_codeResponse.GetResponseStream()); all_code = the_Reader.ReadToEnd(); the_Reader.Close(); ArrayList my_list = new ArrayList(); string p = @"http://([/w-]+/.)+[/w-]+(/[/w- ./?%&=]*)?"; Regex re = new Regex(p, RegexOptions.IgnoreCase); MatchCollection mc = re.Matches(all_code);
for (int i = 0; i <= mc.Count - 1; i++) { bool _foo = false; string name = mc[i].ToString(); foreach (string list in my_list) { if (name == list) { _foo = true; break; } }//过滤
if (!_foo) { TextBox2.Text += name + "/n"; } } }}
前台<%@ 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>抓取网页所有链接</title> </head><body > <form id="form1" runat="server"> <div> <asp:TextBox ID="TextBox1" runat="server" Width="481px"></asp:TextBox> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="提取" /> <br /> <asp:TextBox ID="TextBox2" runat="server" Height="304px" TextMode="MultiLine" Width="524px"></asp:TextBox></div> </form></body></html>
