Send an HTTP POST request with C#

Question

I'm try to Send Data Using the WebRequest with POST But my problem is No data has be streamed to the server.

string user = textBox1.Text; string password = textBox2.Text; ASCIIEncoding encoding = new ASCIIEncoding(); string postData = "username" + user + "&password" + password; byte[] data = encoding.GetBytes(postData); WebRequest request = WebRequest.Create("http://localhost/s/test3.php"); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; request.ContentLength = data.Length; Stream stream = request.GetRequestStream(); stream.Write(data, 0, data.Length); stream.Close(); WebResponse response = request.GetResponse(); stream = response.GetResponseStream(); StreamReader sr99 = new StreamReader(stream); MessageBox.Show(sr99.ReadToEnd()); sr99.Close(); stream.Close();

here the result

Fabien ESCOFFIER · Accepted Answer · 2016-04-19 21:38:47Z

It's because you need to assign your posted parameters with the = equal sign:

byte[] data = Encoding.ASCII.GetBytes( $"username={user}&password={password}"); WebRequest request = WebRequest.Create("http://localhost/s/test3.php"); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; request.ContentLength = data.Length; using (Stream stream = request.GetRequestStream()) { stream.Write(data, 0, data.Length); } string responseContent = null; using (WebResponse response = request.GetResponse()) { using (Stream stream = response.GetResponseStream()) { using (StreamReader sr99 = new StreamReader(stream)) { responseContent = sr99.ReadToEnd(); } } } MessageBox.Show(responseContent);

See the username= and &password= in post data formatting.

You can test it on this fiddle.

Edit :

It seems that your PHP script has parameters named diffently than those used in your question.

I updated my answer. I also added a fiddle so you can test yourself, it does work.
It's because your PHP script accept parameters that are named differently thant you exposed in your question.

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