C# 获取任意网页标题(title)示例源码

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Net;using System.IO;using System.Text.RegularExpressions;namespace Ex15_08{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { if (textBox1.Text == "") { MessageBox.Show("请输入网址"); return; } else{ if (ValidateDate1(textBox1.Text.TrimEnd())) { string strl;//存储编码 WebRequest wb = WebRequest.Create(textBox1.Text.Trim());//请求资源 WebResponse webRed = wb.GetResponse();//响应请求 Stream redweb = webRed.GetResponseStream();//返回数据存入流中 StreamReader sr = new StreamReader(redweb, Encoding.Default);//从流中读出数据 StringBuilder sb = new StringBuilder();//可变字符 while ((strl = sr.ReadLine()) != null) { sb.Append(strl);//读出数据存入可变字符中 } getstr(sb.ToString());//调用正则表达式方法读出标题 } else { MessageBox.Show("请输入正确的网址"); return; }; } } public void getstr(string strUrl) { string d = @"<title>(?<title>[^<]*)</title>"; textBox2.Text = Regex.Match(strUrl,d).ToString(); } public bool ValidateDate1(string input) { return Regex.IsMatch(input, "http(s)?://([\\w-] \\.) [\\w-] (//[\\w- .//?%&=]*)?"); } }}