HttpWebRequest pass parameters to WebService

Question

I have a webpage that need to pass data to web Service (SMS) and I tried to use WebRequest to do this work but when I use this class the following error appears:

Cannot close stream until all bytes are written

in the line after this line :

stOut.WriteLine(strNewValue,number,text);

What is the problem? I tried to use Flush() but didn't work either

public class SendSms { public SendSms(string number, string text) { string strNewValue; string strResponse; HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://www.buymessage.com/ostazSms/send.php"); req.Method = "POST"; req.ContentType = "application/x-www-form-urlencoded"; strNewValue = "usr=****&pwd=*****&to={0}&msg={1}"; req.ContentLength = strNewValue.Length; using(StreamWriter stOut = new StreamWriter (req.GetRequestStream(), System.Text.Encoding.Unicode)) { stOut.WriteLine(strNewValue,number,text); } StreamReader stIn = new StreamReader(req.GetResponse().GetResponseStream()); strResponse = stIn.ReadToEnd(); stIn.Close(); } }

is it a .net/WDSL webservice? It woudl probably be easier to create a Web reference or service reference and let it handle the http interaction. as for your approach, have you tried flushing the stream after the write? — Frank Thomas
– Frank Thomas, Commented Nov 2, 2012 at 23:32

Fenton · Accepted Answer · 2012-11-02 23:44:44Z

1

Your issue is that you call WriteLine, which probably doesn't send all the data.

Here is a snippet that encodes the post data and sends it all:

string strNewValue = string.Format("usr=****&pwd=*****&to={0}&msg={1}", "A", "B"); byte[] byteArray = Encoding.UTF8.GetBytes (strNewValue); req.ContentLength = byteArray.Length; using (Stream dataStream = req.GetRequestStream ()) { dataStream.Write (byteArray, 0, byteArray.Length); }