C# 调用wcf restful web服务将数据从c插入数据库

写了一个RESTWeb服务，和一个asp.net注册页面，用户输入的数据发送到web服务，c代码写在下面

try
{
    string posturl = "serverurl/insertInfo/";
    string id = sid.Text;
    string pas = regpw.Text;
    string nam = sname.Text;
    string mob = smob.Text;
    string email = semail.Text;
    string addre = sadd.Text;
    string st = "pending";
    string finalurl = posturl + id + "/" + pas + "/" + nam + "/" + mob + "/" + 
                      email + "/" + addre + "/" + st;
    HttpWebRequest req = (HttpWebRequest)WebRequest.Create(finalurl);
    req.Method = "POST";
    req.ContentType = "application/x-www-form-urlencoded";
    req.KeepAlive = false;
    req.Timeout = 5000;
    Stream poststresm = req.GetRequestStream();
    poststresm.Close();
    //HttpWebResponse res = (HttpWebResponse)req.GetResponse();
    //StreamReader red = new StreamReader(res.GetResponseStream(), Encoding.UTF8);
    //Console.WriteLine("response");
    //Console.WriteLine(red.ReadToEnd().ToString());
    //Console.ReadKey();
}
catch (Exception ex)
{
    Console.WriteLine(ex);
}

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啊…有什么问题吗，伙计？数据没有插入到数据库中，如果我删除响应的注释，我会得到一个错误webException。我的web服务不返回任何东西。