我要获取一个需要登陆的网站的内容，请问应该怎样写？谢谢
各位高手！！我要获取一个需要登陆的网站的内容，请问应该怎样写？谢谢！！ 急用！！！

[解决办法]

C# code

 try            {                CookieContainer cookieContainer = new CookieContainer();                ///////////////////////////////////////////////////                // 1.打开 default.aspx 页面，获得 GetVeiwState & EventValidation                ///////////////////////////////////////////////////                                // 设置打开页面的参数                HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;                request.Method = "GET";                request.KeepAlive = false;                request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";                Encoding encode = System.Text.Encoding.GetEncoding(936);                // 接收返回的页面                HttpWebResponse response = request.GetResponse() as HttpWebResponse;                System.IO.Stream responseStream = response.GetResponseStream();                System.IO.StreamReader reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);                string srcString = reader.ReadToEnd();                // 获取页面的 VeiwState                                string viewStateFlag = "id=\"__VIEWSTATE\" value=\"";                int i = srcString.IndexOf(viewStateFlag) + viewStateFlag.Length;                int j = srcString.IndexOf("\"", i);                string viewState = srcString.Substring(i, j - i);                // 获取页面的 EventValidation                                string eventValidationFlag = "id=\"__EVENTVALIDATION\" value=\"";                i = srcString.IndexOf(eventValidationFlag) + eventValidationFlag.Length;                j = srcString.IndexOf("\"", i);                string eventValidation = srcString.Substring(i, j - i);                ///////////////////////////////////////////////////                // 2.自动填充并提交 MyLogin.aspx 页面                ///////////////////////////////////////////////////                // 提交按钮的文本                string submitButton = "登陆";                // 用户名和密码                string userName = "";                string password = "";                // 将文本转换成 URL 编码字符串                viewState = System.Web.HttpUtility.UrlEncode(viewState);                eventValidation = System.Web.HttpUtility.UrlEncode(eventValidation);                submitButton = System.Web.HttpUtility.UrlEncode(submitButton);                // 要提交的字符串数据。格式形如:user=uesr1&password=123                string formatString = "txtUserName={0}&txtPwd={1}&btnLogin={2}&__VIEWSTATE={3}&__EVENTVALIDATION={4}";                string postString = string.Format(formatString, userName, password, submitButton, viewState, eventValidation);                // 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(url) as HttpWebRequest;                request.Method = "POST";                request.KeepAlive = false;                request.ContentType = "application/x-www-form-urlencoded";                request.CookieContainer = cookieContainer;                request.ContentLength = postData.Length;                // 提交请求数据                System.IO.Stream outputStream = request.GetRequestStream();                outputStream.Write(postData, 0, postData.Length);                outputStream.Close();                                // 接收返回的页面                response = request.GetResponse() as HttpWebResponse;                responseStream = response.GetResponseStream();                reader = new StreamReader(responseStream, System.Text.Encoding.Default);                srcString = reader.ReadToEnd();                              sw.Close();                fs.Close();                                           }            catch (WebException we)            {                string msg = we.Message;            }