Post binary data to web client using c#

Question

I am working on a c# project. I have to call an external web service and post file as binary data and read its response. Below is my code

var webClient = new WebClient();
string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x", NumberFormatInfo.InvariantInfo);
webClient.Headers.Add("Content-Type", "multipart/form-data; boundary=" + boundary);
var fileData = webClient.Encoding.GetString(file);
var package = string.Format("--{0}\r\nContent-Disposition: form-data; name=\"file\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n{3}\r\n--{0}--\r\n", boundary, filename, contentType, fileData);
var nfile = webClient.Encoding.GetBytes(package);
byte[] resp = webClient.UploadData(url, "POST", nfile);

I have passed content type as "application/octet-stream". I am surely missing something but cannot figure it out.

You'd be better off using HttpClient rather than WebClient. It'll handle the fiddly bits for you. — Gary McGill
– Gary McGill, Commented Jan 12, 2017 at 11:02
@Dillanm You are saying I donot need to specify content type in my code ? — Neha
– Neha, Commented Jan 12, 2017 at 11:04
@Dillanm Woah! that worked. Thanks Dilanm, sometimes we approach a task with complexity and forget that things can be simple. Thanks alot, you saved my day :) — Neha
– Neha, Commented Jan 12, 2017 at 11:07
@Neha No sorry; you'll still need to specify the content type but try using UploadFile in place of UploadData — Dillanm
– Dillanm, Commented Jan 12, 2017 at 11:08

Dillanm · Accepted Answer · 2017-01-12 11:08:54Z

1

Have you tried simply WebClient.UploadFile? See MSDN

(posted as answer for posterity)

answered Jan 12, 2017 at 11:08

Dillanm

86612 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Post binary data to web client using c#

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related