When sending a POST request via HttpWebRequest, you need to pass GET parameters to the URL: http://site.ru?mode=1 POST parameters come, but the server does not see GET parameters.

Request is created

HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(this.url + "?mode="+mode); request.Method = WebRequestMethods.Http.Post; // добавление post параметров using (var stream = request.GetRequestStream()) { stream.Write(bytes, 0, bytes.Length); stream.Close(); }

    1 answer 1

    Try this:

     public class Requester { public List<Cookie> Cookies = new List<Cookie>(); public string UserAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0"; public WebResponse Get(string url) { HttpWebRequest rq = (HttpWebRequest)WebRequest.Create(url); rq.CookieContainer = new CookieContainer(); foreach (var cookie in Cookies) { rq.CookieContainer.Add(cookie); } WebRequest req = WebRequest.Create(url); ((HttpWebRequest)req).UserAgent = UserAgent; req.Method = "GET"; return req.GetResponse(); }