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[1024];
                int size = responseStream.Read(bArr, 0, (int)bArr.Length);
                while (size > 0)
                {
                    stream.Write(bArr, 0, size);
                    size = responseStream.Read(bArr, 0, (int)bArr.Length);
                }
                stream.Close();
                responseStream.Close();
                return path;
            }
            catch (Exception ex)
            {

                throw ex;
            }

        }

调用方式：

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