/// </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;

             }

         }

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