string responseStr = null; string boundary = "----------------------" + DateTime.Now.Ticks.ToString("x"); byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes(" --" + boundary + " "); HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("目标服务器地址"); request.Method = "POST"; request.ContentType = "multipart/form-data; boundary=" + boundary; request.KeepAlive = true; request.Timeout = 95000; request.Credentials = System.Net.CredentialCache.DefaultCredentials; request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36"; System.IO.Stream rs = request.GetRequestStream(); string headerTemplate = "Content-Disposition: form-data; name="{0}"; filename="{1}" Content-Type: {2} "; for (int k = 0; k < Request.Files.Count; k++) { System.Web.HttpPostedFile hp = Request.Files[k]; string filename = hp.FileName; //文件分隔符 rs.Write(boundarybytes, 0, boundarybytes.Length); //文件头 byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(string.Format(headerTemplate,"file"+k, filename,hp.ContentType)); rs.Write(headerbytes, 0, headerbytes.Length); headerbytes = new byte[hp.InputStream.Length]; //文件数据 hp.InputStream.Read(headerbytes,0,headerbytes.Length); rs.Write(headerbytes, 0, headerbytes.Length); } //结束分隔符 byte[] trailer = System.Text.Encoding.ASCII.GetBytes(" --" + boundary + "-- "); rs.Write(trailer, 0, trailer.Length); rs.Close(); WebResponse wresp = null; try { wresp = request.GetResponse(); System.IO.Stream stream2 = wresp.GetResponseStream(); System.IO.StreamReader reader2 = new System.IO.StreamReader(stream2); responseStr = reader2.ReadToEnd(); } catch { } finally { request = null; } Response.Write(responseStr); ;