protected void Page_Load(object sender, EventArgs e){//设置Cookie，存入HashtableHashtable ht = new Hashtable();ht.Add("username", "youraccount");ht.Add("id", "yourid");this.Collect(ht);}public void Collect(Hashtable ht){string content = string.Empty;string url = "http://www.ibest100.com/需要登录后才能采集的页面";string host = "http://www.ibest100.com";try{//获取提交的字节byte[] bs = Encoding.UTF8.GetBytes(content);//设置提交的相关参数HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);req.Method = "POST";req.ContentType = "application/json;charset=utf-8";req.ContentLength = bs.Length;//将Cookie放入CookieContainer，然后再将CookieContainer添加到HttpWebRequestCookieContainer cc = new CookieContainer();cc.Add(new Uri(host), new Cookie("username", ht["username"].ToString()));cc.Add(new Uri(host), new Cookie("id", ht["id"].ToString()));req.CookieContainer = cc;//提交请求数据Stream reqStream = req.GetRequestStream();reqStream.Write(bs, 0, bs.Length);reqStream.Close();//接收返回的页面，必须的，不能省略WebResponse wr = req.GetResponse();System.IO.Stream respStream = wr.GetResponseStream();System.IO.StreamReader reader = new System.IO.StreamReader(respStream, System.Text.Encoding.GetEncoding("utf-8"));string t = reader.ReadToEnd();System.Web.HttpContext.Current.Response.Write(t);wr.Close();}catch (Exception ex){System.Web.HttpContext.Current.Response.Write("异常在getPostRespone:" + ex.Source + ":" + ex.Message);}}

protected void Page_Load(object sender, EventArgs e){try{CookieContainer cookieContainer = new CookieContainer();string formatString = "username={0}&password={1}";//***************string postString = string.Format(formatString, "youradminaccount", "yourpassword");//将提交的字符串数据转换成字节数组byte[] postData = Encoding.UTF8.GetBytes(postString);//设置提交的相关参数string URI = "http://www.ibest100.com/登录页面";//***************HttpWebRequest request = WebRequest.Create(URI) 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，必须的，不能省略HttpWebResponse response = request.GetResponse() as HttpWebResponse;System.IO.Stream responseStream = response.GetResponseStream();System.IO.StreamReader reader = new System.IO.StreamReader(responseStream, Encoding.GetEncoding("gb2312"));string srcString = reader.ReadToEnd();//打开您要访问的页面URI = "http://www.ibest100.com/需要登录后才能采集的页面";//***************request = WebRequest.Create(URI) as HttpWebRequest;request.Method = "GET";request.KeepAlive = false;request.CookieContainer = cookieContainer;// 接收返回的页面response = request.GetResponse() as HttpWebResponse;responseStream = response.GetResponseStream();reader = new System.IO.StreamReader(responseStream, Encoding.GetEncoding("gb2312"));srcString = reader.ReadToEnd();//输出获取的页面或者处理Response.Write(srcString);}catch (WebException we){string msg = we.Message;Response.Write(msg);}}