c# 登录带验证码网站

 

前面提到怎样获取网站的临时会话id和如何获取网站的验证码，下面代码比较简单，直接利用得到的验证码登录网站

   如果要实现完全不用人工参与直接登录带验证码的网站，需要验证码识别技术，以后有机会献上代码！

  CookieContainer cookieContainer = new CookieContainer();
            string URI = "登录网址";
            HttpWebRequest request = WebRequest.Create(URI) as HttpWebRequest;
            string srcString = "";
            // 接收返回的页面
            HttpWebResponse response  ;
            System.IO.Stream responseStream;
           


            //POST的数据
            string postString = "username=*&password=*&passcode="+验证码+"&Submit=%D3%C3%BB%A7%B5%C7%C2%BC&comeurl=";
            // 将提交的字符串数据转换成字节数组
            byte[] postData = Encoding.ASCII.GetBytes(postString);
            // 设置提交的相关参数
            request = WebRequest.Create(URI) as HttpWebRequest;
            request.Method = "POST";
            request.KeepAlive = false;
            request.ContentType = "application/x-www-form-urlencoded";
            cookieContainer.SetCookies(new Uri("服务器网址"), aspcookie);
            request.CookieContainer = cookieContainer;
            request.ContentLength = postData.Length;
          


            // 接收返回的页面
            response = request.GetResponse() as HttpWebResponse;
            responseStream = response.GetResponseStream();
            System.IO.StreamReader reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);
            reader = new System.IO.StreamReader(responseStream, Encoding.GetEncoding("GB2312"));
            srcString = reader.ReadToEnd();