¿Cómo pasar los parámetros POST a la solicitud web de ASP.Net?

Question

Estoy tratando de hacer solicitudes web programáticamente en ASP.NET, utilizando el método POST.
Me gustaría enviar parámetros de POST con la solicitud web también. Algo como esto:

WebRequest req = WebRequest.Create("accounts.craigslist.org/login/pstrdr"); 
    req.Method = "POST"; 
    req.Headers.Add("Content-Type", "application/x-www-form-urlencoded"); 
    //WebRequest.Parameters.add("areaabb","hou"); 

obviamente la línea comentada no funciona. ¿Cómo logro esto?

Answer 1

Intenta así ...

string email = "YOUR EMAIL"; 
    string password = "YOUR PASSWORD"; 

    string URLAuth = "https://accounts.craigslist.org/login"; 
    string postString = string.Format("inputEmailHandle={0}&name={1}&inputPassword={2}", email, password); 

    const string contentType = "application/x-www-form-urlencoded"; 
    System.Net.ServicePointManager.Expect100Continue = false; 

    CookieContainer cookies = new CookieContainer(); 
    HttpWebRequest webRequest = WebRequest.Create(URLAuth) as HttpWebRequest; 
    webRequest.Method = "POST"; 
    webRequest.ContentType = contentType; 
    webRequest.CookieContainer = cookies; 
    webRequest.ContentLength = postString.Length; 
    webRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1"; 
    webRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"; 
    webRequest.Referer = "https://accounts.craigslist.org"; 

    StreamWriter requestWriter = new StreamWriter(webRequest.GetRequestStream()); 
    requestWriter.Write(postString); 
    requestWriter.Close(); 

    StreamReader responseReader = new StreamReader(webRequest.GetResponse().GetResponseStream()); 
    string responseData = responseReader.ReadToEnd(); 

    responseReader.Close(); 
    webRequest.GetResponse().Close();