Click the download button to download the file to local download stream

 protected void Down_load (object sender, EventArgs e) {//create a stream for the file stream stream = null;        This controls how many bytes to read at a time and send to the client int bytestoread = 10000;        Buffer to read bytes in chunk size specified above byte[] buffer = new Byte[bytestoread];        String url = "Http://stv1.222.net/mv/dkp10608.mp4";        String fileName = "11.mp4"; Try {//create a WebRequest to get the file HttpWebRequest Filereq = (HttpWebRequest) webreque St.            Create (URL);            HttpWebResponse Fileresp = (HttpWebResponse) filereq.getresponse ();            if (Filereq.contentlength > 0) fileresp.contentlength = filereq.contentlength;            stream = Fileresp.getresponsestream ();            var resp = HttpContext.Current.Response; Resp.            ContentType = "Application/octet-stream"; Indicate the type of data being sent resp. AddheadeR ("Content-disposition", "attachment;filename=\" "+ filename +" \ ""); Resp.            AddHeader ("Content-length", fileResp.ContentLength.ToString ());            int length; Do {//verify-client is connected if (resp. isclientconnected) {//read data into the buffer length = stream.                    Read (buffer, 0, bytestoread); and write it out to the response ' s output stream resp.                    Outputstream.write (buffer, 0, length); Flush the Data resp.                    Flush ();                Clear the data buffer = new Byte[bytestoread];                    } else {//cancel The download if client has disconnected                length =-1; }} while (length > 0);          Repeat until no data is read} catch (Exception) {  Throw                } finally {if (stream! = null) {//close the input stream Stream.            Close (); }        }}

　　

Click the download button to download the file to local download stream