Заполнение формы через HttpWebRequest

karatheodory:
Помогите разобраться, что не так :[ На aspx-форме есть два поля - имя и емейл. Нужно её программно заполнить и засобмитить. Делаю так: req = (HttpWebRequest)HttpWebRequest.Create("http://localhost:8090"); req.Method = "POST"; req.ContentType = "application/x-www-form-urlencoded"; req.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, application/x-silverlight, */*"; req.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; InfoPath.2; .NET CLR 3.0.04506.648; .NET CLR 3.5.20706)"; string formParams = "TextBoxName=test&TextBoxEmail=test@test.com"; byte[] bytes = Encoding.UTF8.GetBytes(formParams); req.ContentLength = bytes.Length; Stream reqStream = req.GetRequestStream(); reqStream.Write(bytes, 0, bytes.Length); reqStream.Close(); resp = (HttpWebResponse)req.GetResponse(); stream = resp.GetResponseStream(); //выдаю ответ на экран Не работает, в ответ приходит та же незаполненая форма. Как можно сделать таку штуку?

public static class FillWebForm
{

    static private string ExtractViewState(string content)
    {
        System.Text.RegularExpressions.Regex _regex =
            new Regex(@"[\s\S]+?)\""[\s\S]*?/>",
            RegexOptions.IgnoreCase | RegexOptions.Compiled);
        System.Text.RegularExpressions.Match _match = _regex.Match(content);
        return System.Web.HttpUtility.UrlEncodeUnicode(
            _match.Success
            ? _match.Groups["value"].Value
            : string.Empty);
    }

    static private string ExtractEventValidation(string content)
    {
        System.Text.RegularExpressions.Regex _regex =
            new Regex(@"[\s\S]+?)\""[\s\S]*?/>",
            RegexOptions.IgnoreCase | RegexOptions.Compiled);
        System.Text.RegularExpressions.Match _match = _regex.Match(content);
        return System.Web.HttpUtility.UrlEncodeUnicode(
            _match.Success
            ? _match.Groups["value"].Value
            : string.Empty);
    }

    static private string ExtractEventTarget(string content)
    {
        System.Text.RegularExpressions.Regex _regex =
            new Regex(@"[\s\S]+?)\""[\s\S]*?/>",
            RegexOptions.IgnoreCase | RegexOptions.Compiled);
        System.Text.RegularExpressions.Match _match = _regex.Match(content);
        return System.Web.HttpUtility.UrlEncodeUnicode(
            _match.Success
            ? _match.Groups["value"].Value
            : string.Empty);
    }

    public static string FillASPXPOSTForm(string args, string url, string btnName, string encoding)
    {
        // getting form
        HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);
        req.Method = "GET";
        req.ContentType = "application/x-www-form-urlencoded";
        req.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, application/x-silverlight, */*";
        req.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; InfoPath.2; .NET CLR 3.0.04506.648; .NET CLR 3.5.20706)";
        req.ContentLength = 0;        

        HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
        Stream stream = resp.GetResponseStream();

        string[] cookieVal = null;
        if (resp.Headers["Set-Cookie"] != null)
            cookieVal = resp.Headers["Set-Cookie"].Split(new char[] { ',' });

        StreamReader reader = new StreamReader(stream, Encoding.GetEncoding(encoding));
        string ans = reader.ReadToEnd();
        stream.Close();

        // filling and sending
        CookieContainer cookie = new CookieContainer();
        if (cookieVal != null)
        {
            foreach (string cook in cookieVal)
            {
                string[] cookie1 = cook.Split(new char[] { ';' });
                if (cookie1.Length  2 ? cookie1[2].Split(new char[] { '=' })[1] : ""));
            }
        }

        req = (HttpWebRequest)HttpWebRequest.Create(url);
        req.Method = "POST";
        req.ContentType = "application/x-www-form-urlencoded";
        req.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, application/x-silverlight, */*";
        req.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; InfoPath.2; .NET CLR 3.0.04506.648; .NET CLR 3.5.20706)";
        req.CookieContainer = cookie;

        string view = ExtractViewState(ans);
        string eventValidation = ExtractEventValidation(ans);
        string formParams = args + "&__VIEWSTATE=" + view + "&__EVENTTARGET=" + btnName + "&__EVENTVALIDATION=" + eventValidation;

        byte[] bytes = Encoding.UTF8.GetBytes(formParams);
        req.ContentLength = bytes.Length;

        Stream reqStream = req.GetRequestStream();
        reqStream.Write(bytes, 0, bytes.Length);
        reqStream.Close();
        resp = (HttpWebResponse)req.GetResponse();
        stream = resp.GetResponseStream();
        StreamReader sr = new StreamReader(stream, Encoding.GetEncoding(encoding));
        ans = sr.ReadToEnd();
        return ans;
    }
}