C#抓取网面上的html内容（JS动态生成的无法抓取）

抓取内容的代码:

         /// </summary>
         /// <param name="url">路径URL</param>
         /// <param name="path">存储路径</param>
         /// <returns></returns>
         public static string HttpDownloadFile(string url, string path)
         {
             try
             {
                 // 设置参数
                 HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

                 //发送请求并获取相应回应数据
                 HttpWebResponse response = request.GetResponse() as HttpWebResponse;
                 //直到request.GetResponse()程序才开始向目标网页发送Post请求
                 Stream responseStream = response.GetResponseStream();

                 //可以将生成的流文件直接生成字符串 SourceCode就是生成后的字符串
                 //StreamReader readStream = new StreamReader(responseStream, Encoding.UTF8);
                 //string SourceCode = readStream.ReadToEnd();

                 //创建本地文件写入流
                 if (File.Exists(path))
                 {
                     File.Delete(path);
                 }
                 FileStream fs = File.Create(path);
                 fs.Close();

                 Stream stream = new FileStream(path, FileMode.Create);
                 byte[] bArr = new byte[];
                 int size = responseStream.Read(bArr, , (int)bArr.Length);
                 while (size > )
                 {
                     stream.Write(bArr, , size);
                     size = responseStream.Read(bArr, , (int)bArr.Length);
                 }
                 stream.Close();
                 responseStream.Close();
                 return path;
             }
             catch (Exception ex)
             {

                 throw ex;
             }

         }

调用方式：

                 HttpReviceFile.HttpDownloadFile("http://localhost:811/ ", @"D:\Work\Test.xml");