WebClient webClient;

        Uri urimx = new Uri("http://..............");

       string path2 = @"D:\Text\";

        webClient = new WebClient();

            webClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于对向Internet资源的请求进行身份验证的网络凭据。

            Byte[] pageData = new Byte[] { };

            try

            {

                pageData = webClient.DownloadData(urimx); //从指定网站下载数据

            }

            catch (Exception)

            {

         

            }

            finally

            {

                webClient.Dispose();

            }

            string pageHtml = Encoding.UTF8.GetString(pageData); //如果获取网站页面采用的是UTF-8，则使用这句

            string[] stringSeparators = new string[] { "\r\n" };

            string[] arr = pageHtml.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries);

            for (int i = 0; i < arr.Length; i++)

            {

                string txtName = arr[i].Split(',')[0] + ".txt";

                StreamWriter writer = null;

                writer = new StreamWriter(path2 + txtName, true, Encoding.Default);

                writer.WriteLine(arr[i]);

                writer.Flush();

                writer.Close();

            }