CookieContainer cookieContainer = null;

        //登陆

        public string Login(string posturl, string postData)

        {

            Stream outstream = null;

            Stream instream = null;

            StreamReader sr = null;

            HttpWebResponse response = null;

            HttpWebRequest request = null;

            Encoding encoding = System.Text.Encoding.GetEncoding("utf-8");

            byte[] data = encoding.GetBytes(postData);

            // 准备请求...

            try

            {

                // 设置参数

                request = WebRequest.Create(posturl) as HttpWebRequest;

               

                request.CookieContainer = cookieContainer;



                request.AllowAutoRedirect = true;

                request.Method = "POST";

                request.ContentType = "application/x-www-form-urlencoded;charset=gb2312";

                request.ContentLength = data.Length;

                outstream = request.GetRequestStream();

                outstream.Write(data, 0, data.Length);

                outstream.Close();

                //发送请求并获取相应回应数据

                response = request.GetResponse() as HttpWebResponse;

                //直到request.GetResponse()程序才开始向目标网页发送Post请求

                instream = response.GetResponseStream();

                sr = new StreamReader(instream, encoding);

                foreach (Cookie item in response.Cookies)

                {

                    cookieContainer.Add(new Uri(posturl), item);

                }

 

                //返回结果网页（html）代码

                string content = sr.ReadToEnd();

                string err = string.Empty;

                return content;

            }

            catch (Exception ex)

            {

                string err = ex.Message;

                return string.Empty;

            }

        }

        //发帖

        public void  fate()

        {  

            //发帖

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri("http://localhost/upload/forum.php?mod=post&action=newthread&fid=2&extra=&topicsubmit=yes"));

            request.Method = "POST";

            request.ContentType = "text/html; charset=gb2312";

            request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13";

            request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";

            request.CookieContainer = cookieContainer;

 

            request.CookieContainer.SetCookies(new System.Uri("http://localhost/upload/forum.php?mod=post&action=newthread&fid=2&extra=&topicsubmit=yes"), "Set-Cookie");

            byte[] data = Encoding.GetEncoding("utf-8").GetBytes("formhash=d0674f9a&posttime=1299773427&wysiwyg=1&subject=22222222222wwwwwwwwww222222222222222222222&message=1111111111111111111111111111111111ssssssssssssss1111111111111111111111111111111111ssssssssssssss1111111111111111111111111111111111ssssssssssssss1111111111111111111111111111111111ssssssssssssss1111111111111111111111111111111111ssssssssssssss1111111111111111111111111111111111ssssssssss%0D%0A&save=&uploadalbum=&newalbum=&readperm=&price=&usesig=1&allownoticeauthor=1");

            request.CookieContainer = cookieContainer;

            Stream request_Stream = request.GetRequestStream();

            request_Stream.Write(data,0,data.Length);

            request_Stream.Close();





            HttpWebResponse response3 = (HttpWebResponse)request.GetResponse();

            Stream sssssss = response3.GetResponseStream();

            StreamReader sbb = new StreamReader(sssssss,  System.Text.Encoding.GetEncoding("utf-8"));

            string bb=sbb.ReadToEnd();

              

        }





 private void button2_Click(object sender, EventArgs e)

        {  cookieContainer=new CookieContainer();

           string con = Login("http://localhost/upload/member.php?mod=logging&action=login&loginsubmit=yes&infloat=yes&inajax=1", "fastloginfield=username&username=admin&password=admin&quickforward=yes&handlekey=ls&questionid=0&answer=");



            fate();



                }