1     public static bool DownRemoteFile(string url, string filepath) 2         { 3             ServicePointManager.DefaultConnectionLimit = 200; 4             try 5             { 6                 //对远程文件发送一个请求 7                 HttpWebRequest webReq = HttpWebRequest.CreateHttp(url); 8                 webReq.ServicePoint.Expect100Continue = false; 9                 webReq.ServicePoint.UseNagleAlgorithm = false;10                 webReq.ServicePoint.ConnectionLimit = 65500;11                 webReq.AllowWriteStreamBuffering = false; webReq.Proxy = null;12                 13                 //接收远程WEB服务器发回的响应14                 WebResponse webRes = webReq.GetResponse();15             16 17           18                 MemoryStream ms = new MemoryStream();19                 webRes.GetResponseStream().CopyTo(ms);20                 //获取文件长度21                 long fileLength = webRes.ContentLength;22                 byte[] bufferbyte = ms.ToArray();23              24 25                 //判断存储路径每一个节点是否存在26                 if (!System.IO.File.Exists(filepath))27                 {28                     string[] dirArray = filepath.Split('\\');29                     string temp = string.Empty;30                     for (int i = 0; i < dirArray.Length - 1; i++)31                     {32                         temp += dirArray[i].Trim() + "\\";33                         if (!Directory.Exists(temp))34                             Directory.CreateDirectory(temp);35                     }36                 }37                 //创建一个文件流，将处理的文件流写入磁盘38                 FileStream fs = new FileStream(filepath, FileMode.OpenOrCreate, FileAccess.ReadWrite);39                 fs.Write(bufferbyte, 0, bufferbyte.Length);40                 ms.Close();41                 fs.Close();42 43                 if (!System.IO.File.Exists(filepath))44                 {45                     return false;46                 }47                 else48                 {49                     return true;50                 }51             }52             catch (Exception ex)53             {
    55                 return false;56             }57         }