private void SetRequestData(HttpWebRequest request, string data) { var encoding = new ASCIIEncoding(); byte[] byte1 = encoding.GetBytes(data); request.ContentLength = data.Length; var stream = request.GetRequestStream(); stream.Write(byte1, 0, byte1.Length); stream.Close(); } public void Connect(string login, string password) { // 1. Get- sessionId1 var url = "https://ibank.alfabank.ru/ALFAIBS32/"; var request = (HttpWebRequest)HttpWebRequest.Create(url); var response = (HttpWebResponse)request.GetResponse(); // jsessionid // sessionId1 = тАж // 2. Post- jsessionid var controller = url +"ControllerServlet;jsessionid={0}"; url =string.Format(controller, sessionId1); request = (HttpWebRequest)HttpWebRequest.Create, url); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; SetRequestData(request, "command=auth_loginByPasswordPage"); response = (HttpWebResponse)request.GetResponse(); // otokey jsessionid // var otokey = тАж // sessionId2 = тАж // 3. url =string.Format(controller, sessionId2); request = (HttpWebRequest)HttpWebRequest.Create, url); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; var postData = string.Format( "command=auth_loginByPassword&username={0}&password{1} " + "&null_div_expanded=false&OTOKey={2}", login, password, otokey); SetRequestData(request, postData); response = (HttpWebResponse)request.GetResponse(); // Profit! }