抓取链接里数据并存入本地

        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();
            }