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 ImageCollection{    public partial class Form1 : Form    {        private static string Path = AppDomain.CurrentDomain.BaseDirectory + "img";        public Form1()        {            InitializeComponent();        }        private void btnshuaqu_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[] 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 = @"";            //返回网页标题              String title = Regex.Match(result, regex).ToString();            txttitle.Invoke(new Action(() => {                txttitle.Text = Regex.Replace(title, @"[\""]+", "");             }));            foreach (string s in str)            {                Uri u = new Uri(s);                if (u.Host == "www.xxx.com")                {                    Thread downimg = new Thread(() => Get_img(s)) { IsBackground = true };                    downimg.Start();                    txtimg.Invoke(new Action(() => {                        txtimg.AppendText(s + "\r\n");                    }));                }             }            txtimg.Invoke(new Action(() =>            {                txtimg.AppendText("全部抓取完成!\r\n");            }));        }        public void Get_img(string imgpath)        {                        string[] file = imgpath.Split('?');            string name = System.IO.Path.GetFileName(file[0]);            WebClient mywebclient = new WebClient();            mywebclient.DownloadFile(imgpath, Path + @"\" + name);            //Bitmap img = null;            //HttpWebRequest req;            //HttpWebResponse res = null;            //try            //{            //    System.Uri httpUrl = new System.Uri(imgpath);            //    req = (HttpWebRequest)(WebRequest.Create(httpUrl));            //    req.Timeout = 180000; //设置超时值10秒            //    req.UserAgent = "XXXXX";            //    req.Accept = "XXXXXX";            //    req.Method = "GET";            //    res = (HttpWebResponse)(req.GetResponse());            //    img = new Bitmap(res.GetResponseStream());//获取图片流                            //    img.Save(Path + @"\"+name);//随机名            //}            //catch (Exception ex)            //{            //    string aa = ex.Message;            //}            //finally            //{            //    res.Close();            //}        }        /// 
         /// 取得HTML中所有图片的 URL。         /// 
         /// HTML代码         /// 
     
      图片的URL列表
              private string[] GetHtmlImageUrlList(string sHtmlText)        {            // 定义正则表达式用来匹配 img 标签             Regex regImg = new Regex(@"
     
      <>]*?\bsrc[\s\t\r\n]*=[\s\t\r\n]*[""']?[\s\t\r\n]*(?
      
       [^\s\t\r\n""'<>]*)[^<>]*?/?[\s\t\r\n]*>", RegexOptions.IgnoreCase);            // 搜索匹配的字符串             MatchCollection matches = regImg.Matches(sHtmlText);            int i = 0;            string[] sUrlList = new string[matches.Count];            // 取得匹配项列表             foreach (Match match in matches)                sUrlList[i++] = match.Groups["imgUrl"].Value;            return sUrlList;        }    }}
      
     

 

 

#region 下载图片到Imagepublic static Image UrlToImage(string url) {    WebClient mywebclient = new WebClient();    byte[] Bytes = mywebclient.DownloadData(url);    using (MemoryStream ms = new MemoryStream(Bytes)) {        Image outputImg = Image.FromStream(ms);        return outputImg;    }}#endregion