HttpWebRequest pass parameters to WebService

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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

C#

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();  
    }
}

Posted 2-Nov-12 15:09pm

hassanjuniedi

Updated 2-Nov-12 15:20pm

fjdiewornncalwe

v2

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Kuthuparakkal · Answer 1 · 2012-11-02T15:45:00

Try the code below:

C#

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}"; 
         
         byte[] byteArray = Encoding.UTF8.GetBytes(string.Format(strNewValue,number, text));
         req.ContentLength = byteArray.Length;
         Stream dataStream = req.GetRequestStream();
         dataStream.Write(byteArray, 0, byteArray.Length);
         dataStream.Close();
         
         try
         {
                HttpWebResponse response = (HttpWebResponse)req.GetResponse();
                Stream dataStream = response.GetResponseStream();
                StreamReader SR = new StreamReader(dataStream, Encoding.Unicode);
                strResponse = SR.ReadToEnd();
                response.Close();
                dataStream.Close();
                SR.Close();
                req.Abort();
         }
         catch {req.Abort();} 
    }
}