c# - webclient.UploadData "The underlying Connection was Closed: An unexpected error occured on a recieve" -

i trying upload image , video using code below, there no issue image upload using ftp, when uploading video following error

error

the underlying connection closed: unexpected error occurred on receive. 

following code using upload

code

 try             {                 string uploadfilename = path.getfilename(fu_video.filename);                 uploadfilename = "video." + uploadfilename.split('.')[1];                 using (webclient client = new webclient())                 {                     string ftpaddres = "ftp://username:pasword@url-path" + fullname;                      if (!getallfileslist(ftpaddres, "username", "password"))                     {                         ftpwebrequest ftp = (ftpwebrequest)ftpwebrequest.create(ftpaddres);                         ftp.method = webrequestmethods.ftp.makedirectory;                         ftp.keepalive = false;                          ftpwebresponse response = (ftpwebresponse)ftp.getresponse();                     }                     client.uploaddata(new uri(ftpaddres + "/" + uploadfilename), fu_video.filebytes);                 } 

and here stack trace.

stack trace

   @ system.net.webclient.uploaddatainternal(uri address, string method, byte[] data, webrequest& request)    @ system.net.webclient.uploaddata(uri address, string method, byte[] data)    @ system.net.webclient.uploaddata(uri address, byte[] data)    @ mentormentee.signup.signup.btn_vidpreview_click(object sender, eventargs e) in i:\vs projects\code\mentormentee1\mentormentee\signup\signup.aspx.cs:line 469 

after searching read make connection alive false, getting error on line client.uploaddata(uri,byte[]);

please let me know wrong code? video uploaded on ftp, error.

i remember having similar issue, don't remember made work. here code works me:

public void upload(stream stream, string filename) {     if (stream == null)     {         throw new argumentnullexception("stream");     }      try     {         ftpwebrequest ftprequest = createftprequest(filename);         ftprequest.method = webrequestmethods.ftp.uploadfile;          using (stream requestsream = ftprequest.getrequeststream())         {             pump(stream, requestsream);         }          var ftpresponse = (ftpwebresponse)ftprequest.getresponse();         ftpresponse.close();     }     catch (exception e)     {         throw new ftpexception(             string.format("failed upload object. filename: {0}, stream: {1}", filename, stream), e);     } }  private ftpwebrequest createftprequest(string filename) {     if (filename == null)     {         throw new argumentnullexception("filename");     }      string serveruri = string.format("{0}{1}", ftproot, filename);     var ftprequest = (ftpwebrequest)webrequest.create(serveruri);     ftprequest.credentials = new networkcredential(configuration.username, configuration.password);     ftprequest.usepassive = true;     ftprequest.usebinary = true;     ftprequest.keepalive = false;      return ftprequest; }  private static void pump(stream input, stream output) {     var buffer = new byte[2048];     while (true)     {         int bytesread = input.read(buffer, 0, buffer.length);         if (bytesread == 0)         {             break;         }         output.write(buffer, 0, bytesread);     } }