发送数据

//当前页面地址

            string currentUrl = Request.Url.ToString();

            string fileName = "复制文件";

            string url = currentUrl.Substring(0, currentUrl.LastIndexOf(‘/‘)) + "/Default2.aspx?id=" + fileName;   //发送到的页面的地址

            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);

            //读取一个文件

            FileStream fs = new FileStream(Server.MapPath("程序更新说明书.doc"), System.IO.FileMode.Open, System.IO.FileAccess.Read);

            byte[] filecontent = new byte[fs.Length];

            fs.Read(filecontent, 0, filecontent.Length);

            fs.Close();

            fs.Dispose();

            //将图片转换成base64编码的流

            string a = Convert.ToBase64String(filecontent);

            //读取base64编码流，发送

            byte[] requestBytes = System.Text.Encoding.Default.GetBytes(a);

            req.Method = "POST";

            req.ContentType = "application/x-www-form-urlencoded";

            req.ContentLength = requestBytes.Length;

            Stream requestStream = req.GetRequestStream();

            requestStream.Write(requestBytes, 0, requestBytes.Length);

            requestStream.Close();

            //接收返回参数，到string backstr

            HttpWebResponse res = (HttpWebResponse)req.GetResponse();

            StreamReader sr = new StreamReader(res.GetResponseStream(), System.Text.Encoding.Default);

            string backstr = sr.ReadToEnd();

            sr.Close();

            res.Close();

            //输出参数

            Response.Write(backstr);

接受数据

//接收到的参数

            string bb = Request.QueryString["id"];

            Encoding myEncoding = Encoding.GetEncoding("utf-8");

            //接收传递过来的数据流

            Stream resStream = Request.InputStream;

            byte[] filecontent = new byte[resStream.Length];

            //将数据流读入byte数组

            resStream.Read(filecontent, 0, filecontent.Length);

            //数组转换为string以便转换base64使用

            string a = myEncoding.GetString(filecontent);

            //将string读取base64解密到byte数组

            byte[] filecontent2 = Convert.FromBase64String(a);

            //写入目录

            File.WriteAllBytes(Server.MapPath(bb + ".doc"), filecontent2);

            //返回值

            Response.Write("ok");

            Response.End();