How can I Post data using HttpWebRequest?

Question

I have this HttpWebRequest:

var request = HttpWebRequest.Create("http://example.com/api/Phrase/GetJDTO"); request.ContentType = "application/json"; request.Method = "POST";

But I need to add a payload to the body of the request like this:

Jlpt = 2

Can someone help and tell me how I can add data to the POST ?

If you can, use HttpClient rather than HttpWebRequest. It has a more modern, asynchronous API, and a much more straightforward way to add a payload to a request. — Thomas Levesque
– Thomas Levesque, Commented Aug 31, 2016 at 9:53

Mostafiz · Accepted Answer · 2016-08-31 09:52:33Z

You can do by this

var request = HttpWebRequest.Create("http://example.com/api/Phrase/GetJDTO"); var postData = "Jlpt = 2"; var data = Encoding.ASCII.GetBytes(postData); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; request.ContentLength = data.Length; using (var stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } var response = (HttpWebResponse)request.GetResponse(); var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

but I suggest you use HttpClient rather than HttpWebRequest in this case

Thanks very much. Can you explain why you suggest to use HttpClient? What's the difference? Thank you.
you can find more detail in this SO thread stackoverflow.com/questions/22214930/…
The HttpWebResponse and StreamReader in the last two lines are IDisposable, by the way.

Guru Stron · Accepted Answer · 2016-08-31 09:54:39Z

if (data != null) { request.ContentType = "application/json"; using (var stream = new StreamWriter(request.GetRequestStream())) { var serialized = JsonConvert.SerializeObject(data); stream.Write(serialized); } } else { request.ContentLength = 0; }

where data is any object you want to send

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