CookieContainer cookies = new CookieContainer();
string url = "http://www.google.com.hk/";
HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
myHttpWebRequest.Timeout = 20 * 1000; //连接超时
myHttpWebRequest.Accept = "*/*";
myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0;)";
myHttpWebRequest.CookieContainer = new CookieContainer(); //暂存到新实例
myHttpWebRequest.GetResponse().Close();
cookies = myHttpWebRequest.CookieContainer; //保存cookies
string cookiesstr = myHttpWebRequest.CookieContainer.GetCookieHeader(myHttpWebRequest.RequestUri); //把cookies转换成字符串
url = "http://www.google.com.hk/search?oe=utf8&ie=utf8&source=uds&hl=zh-CN&q=3g";
myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
myHttpWebRequest.Timeout = 20 * 1000; //连接超时
myHttpWebRequest.Accept = "*/*";
myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0;)";
myHttpWebRequest.CookieContainer = cookies; //使用已经保存的cookies 方法一
//myHttpWebRequest.Headers.Add("Cookie", cookiesstr); //使用已经保存的cookies 方法二
HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
Stream stream = myHttpWebResponse.GetResponseStream();
stream.ReadTimeout = 15 * 1000; //读取超时
StreamReader sr = new StreamReader(stream, Encoding.GetEncoding("utf-8"));
string strWebData = sr.ReadToEnd();
richTextBox1.Text = cookiesstr +"\r\n\r\n"+ strWebData;