怎么把网站上的图片取出来，知道其在网页中的位置

Question

取出来放在电脑里，然后给后面的程序调用，C#语言的，用什么方式

Answer 1

先将网页全部内容取出来//取网页内容：方法1
            WebBrowser webBrowser = new WebBrowser();            webBrowser.Navigate("网址");            string htmlContex = webBrowser.DocumentText;
方法2：参考
        public static string GetImgUrl(string htmlContent)
        {            string imageUrl = string.Empty;            //string sPattern = @"^<img/s+[^>]*>";            Regex regex = new Regex(@"<img/s+[^>]*/s*src/s*=/s*([']?)(?<url>/S+)'?[^>]*>",                RegexOptions.Compiled);            Match match = regex.Match(htmlContent.ToLower());            if (match.Success)                imageUrl = match.Result("${url}");            return imageUrl;        }

Answer 2

private void button1_Click(object sender, EventArgs e)
        { 
string httpSourse;
string regexImgPattern = @"<img[^>]+(data-ks-lazyload)\s*=\s*""?([^"">]+)""?(?:[^>]+([^"">]+)""?)?";
            myRegex = new Regex(regexImgPattern, RegexOptions.IgnoreCase);
            myMatch = myRegex.Match(httpSourse);
            label7.Text = "";
            while (myMatch.Success == true)
            {
                listBoxImage.Items.Add(myMatch.Groups[2].Value);
                 myMatch = myMatch.NextMatch();
            }}
  private void listBoxImage_Click(object sender, EventArgs e)
        {
            string s = textBoxUrl.Text;
            int index = s.LastIndexOf("/");
            if (index == -1)
            {
                index = s.LastIndexOf("\\");
            }
            string urlpath = s.Substring(0, index + 1);
            string path = listBoxImage.SelectedItem.ToString();
            string path1 = path;
            if (path.StartsWith("http://") == false)
            {
                path1 = urlpath + path;
            }
            string imageUrl = path1;
            try
            {
                pictureBox1.Image = Image.FromStream(client.OpenRead(imageUrl));
                
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + "\n\n" + path1);
            }
        }

Answer 3

根据Url下载文件   void myTest()
        {
            Stream reader = null;
            FileStream stream = null;
            try
            {
                //文件地址
                WebRequest request = WebRequest.Create(@"http://pic.nipic.com/2007-12-10/20071210224154962_2.jpg");                WebResponse response = request.GetResponse();
                reader = response.GetResponseStream();                stream = File.Open("D:myPic.png", FileMode.OpenOrCreate, FileAccess.Write);                byte[] buf = new byte[512];
                int cnt;
                while ((cnt = reader.Read(buf, 0, buf.Length)) > 0)
                {
                    stream.Write(buf, 0, cnt);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                if (reader != null)
                {
                    reader.Close();
                    stream.Close();
                }
            }
        }