WindowsFormsApplication1/Form1.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private static string Path = AppDomain.CurrentDomain.BaseDirectory + "img";
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string url = txturl.Text.Trim();
            if (string.IsNullOrEmpty(url))
            {
                MessageBox.Show("请输入URl");
                return;
            }
            txtimg.AppendText("开始抓取中:\r\n");
            Thread th = new Thread(() => ShuaQu(url)) { IsBackground = true };
            th.Start();
        }
        private void ShuaQu(string url)
        {
            DirectoryInfo di = new DirectoryInfo(Path);
            if (System.IO.Directory.Exists(Path))
            {
                di.Delete(true);
            }
            System.IO.Directory.CreateDirectory(Path);
            //string result = WebHttp.HttpGet(url, null, 3);

            string result = GetHttpResponse(url, 6000);

            string[] str = GetHtmlImageUrlList(result);
            txtimg.Invoke(new Action(() =>
            {
                txtimg.AppendText("已经获取到数据!" + str.Count() + "\r\n");
            }));
            //建立获取网页标题正则表达式  
            String regex = @"<title>.+</title>";

            //返回网页标题  
            String title = Regex.Match(result, regex).ToString();
            txttitle.Invoke(new Action(() =>
            {
                txttitle.Text = Regex.Replace(title, @"[\""]+", "");