如何HttpWebRequest模拟登陆，获取服务端返回Cookie以便登录请求后使用

public static string GetCookie( string requestUrlString, Encoding encoding, ref CookieContainer cookie) { // 向服务端请求 HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(requestUrlString); myRequest.ContentType = " application/x-www-form-urlencoded " ; myRequest.CookieContainer = new CookieContainer(); // 将请求的结果发送给客户端(界面、应用) HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse(); cookie.Add(myResponse.Cookies); StreamReader reader = new StreamReader(myResponse.GetResponseStream(), encoding); return reader.ReadToEnd(); } public static string GetHtml( string requestUrlString, Encoding encoding, CookieContainer cookie) { string ua = " Mozilla/5.0 (Linux; U; Android 2.2; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1 " ; HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(requestUrlString); myRequest.ContentType = " application/x-www-form-urlencoded " ; myRequest.UserAgent = ua; myRequest.CookieContainer = cookie; HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse(); StreamReader reader = new StreamReader(myResponse.GetResponseStream(), encoding); return reader.ReadToEnd(); } public static string PostLogin( string postData, string requestUrlString, ref CookieContainer cookie) { ASCIIEncoding encoding = new ASCIIEncoding(); byte [] data = encoding.GetBytes(postData); // 向服务端请求 HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(requestUrlString); myRequest.Method = " POST " ; myRequest.ContentType = " application/x-www-form-urlencoded " ; myRequest.ContentLength = data.Length; myRequest.CookieContainer = new CookieContainer(); Stream newStream = myRequest.GetRequestStream(); newStream.Write(data, 0 , data.Length); newStream.Close(); // 将请求的结果发送给客户端(界面、应用) HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse(); cookie.Add(myResponse.Cookies); StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8); return reader.ReadToEnd(); } public static string PostRequest( string postData, string requestUrlString, CookieContainer cookie) { ASCIIEncoding encoding = new ASCIIEncoding(); byte [] data = encoding.GetBytes(postData); HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(requestUrlString); myRequest.Method = " POST " ; myRequest.ContentType = " application/x-www-form-urlencoded " ; myRequest.ContentLength = data.Length; myRequest.CookieContainer = cookie; Stream newStream = myRequest.GetRequestStream(); newStream.Write(data, 0 , data.Length); newStream.Close(); HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse(); StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8); return reader.ReadToEnd(); } 本文转自黄聪博客园博客，原文链接：http://www.cnblogs.com/huangcong/p/7514327.html，如需转载请自行联系原作者