先贴出 我的代码，可以得到ASP.NET_SessionId的值，可是为什么 就是登陆不陈宫呢？
代码也是从网上找的，大家看看。
- C# code
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Web;using System.Net;using System.IO;namespace PostData{ public class Post { public string CookieHeader { get; set; } public string EncodeName { get; set; } public string PageContent { get; set; } public Dictionary<string, string> Params { get; set; } public CookieContainer Container { get; set; } public string PostData(string strUrl, string strArgs, string strRefer, string encodename, string method) { return this.PostData(strUrl, strArgs, strRefer, encodename, method, string.Empty); } public string PostData(string strUrl, Dictionary<string, string> dics, string strRefer, string encodename, string method) { string strArgs = string.Empty; StringBuilder objEncodedPostDatas = new StringBuilder(); if (dics != null && dics.Count > 0) { foreach (KeyValuePair<string, string> kv in dics) { objEncodedPostDatas.Append(HttpUtility.UrlEncode(kv.Key)); objEncodedPostDatas.Append("="); objEncodedPostDatas.Append(HttpUtility.UrlEncode(kv.Value)); objEncodedPostDatas.Append("&"); } } strArgs = objEncodedPostDatas.ToString(); return this.PostData(strUrl, strArgs, strRefer, encodename, method, string.Empty); } /// <summary> /// 模拟登陆页面，提交登录数据进行登录，并记录header中的cookie /// </summary> /// <param name="strURL">提交的页面地址</param> /// <param name="strArgs">用户登录数据</param> /// <param name="strRefer">引用地址</param> /// <param name="code">网站编码名称</param> /// <param name="method"></param> /// <param name="contentType"></param> /// <returns></returns> public string PostData(string strURL, string strArgs, string strRefer, string code, string method, string contentType) { if (this.Container == null) this.Container = new CookieContainer(); strRefer = strURL; Uri uri = new Uri("http://" + new Uri(strURL).Host); try { string strRs = string.Empty; HttpWebRequest myHttpWebRequest = WebRequest.Create(strURL) as HttpWebRequest; myHttpWebRequest.AllowAutoRedirect = true; myHttpWebRequest.KeepAlive = true; myHttpWebRequest.Accept = "image/gif,image/x-xbitmap,image/jpeg,image/pjpeg," + "application/vnd.ms-excel,application/msword,application/x-shockwave-flash,*/*"; myHttpWebRequest.Referer = strRefer; myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506)"; if (string.IsNullOrEmpty(contentType)) { contentType = "application/x-www-form-urlencoded"; } myHttpWebRequest.ContentType = contentType; myHttpWebRequest.Method = method; myHttpWebRequest.Headers.Add("Accept-Encoding", "gzip,deflate"); myHttpWebRequest.CookieContainer = this.Container;// new CookieContainer(); byte[] postData = Encoding.GetEncoding(code).GetBytes(strArgs); myHttpWebRequest.ContentLength = postData.Length; Stream poststream = myHttpWebRequest.GetRequestStream(); poststream.Write(postData, 0, postData.Length); poststream.Close(); HttpWebResponse response = myHttpWebRequest.GetResponse() as HttpWebResponse; CookieCollection cc = myHttpWebRequest.CookieContainer.GetCookies(uri); response.Cookies = cc; foreach (Cookie c in cc) { string s = c.Name + c.Value + c.Domain + c.Path; } string sss = response.Headers.Get("Set-Cookie"); string header = response.Headers.ToString(); this.CookieHeader = myHttpWebRequest.CookieContainer.GetCookieHeader(uri); string ss = response.Headers.Get("Location"); StreamReader sr = null; sr = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(code)); strRs = sr.ReadToEnd(); sr.Close(); response.Close(); return strRs; } catch (Exception e) { throw new Exception(e.Message); } } /// <summary> /// 在postlogin陈宫登录后记录下header中的cookie,然后获取此网站上其他页面的内容 /// </summary> /// <param name="strUrl"></param> /// <param name="strRefer"></param> /// <param name="codeName"></param> /// <returns></returns> public string GetPage(string strUrl, string strRefer, string codeName) { return this.GetPage(strUrl, strRefer, codeName, string.Empty); } public string GetPage(string strURL, string strRefer, string codename, string contentType) { if (this.Container == null) this.Container = new CookieContainer(); strRefer = strURL; Uri uri = new Uri("http://" + new Uri(strURL).Host); string strResult = string.Empty; HttpWebRequest myHttpWebRequest = WebRequest.Create(strURL) as HttpWebRequest; myHttpWebRequest.AllowAutoRedirect = true; myHttpWebRequest.KeepAlive = false; myHttpWebRequest.CookieContainer = this.Container; myHttpWebRequest.Accept = "image/gif,image/x-xbitmap,image/jpeg,image/pjpeg,application/vnd.ms-excel,application/msword,application/x-shockwave-flash,*/*"; myHttpWebRequest.Referer = strRefer; myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506)"; if (string.IsNullOrEmpty(contentType)) { contentType = "application/x-www-form-urlencoded"; } myHttpWebRequest.ContentType = contentType; myHttpWebRequest.Method = "GET"; myHttpWebRequest.Headers.Add("Accept-Encoding", "gzip,deflate"); if (!string.IsNullOrEmpty(this.CookieHeader) && this.CookieHeader.Length > 0) { //myHttpWebRequest.Headers.Add("cookie:" + this.CookieHeader); // myHttpWebRequest.CookieContainer.SetCookies(uri, this.CookieHeader); } HttpWebResponse response = null; StreamReader sr = null; response = myHttpWebRequest.GetResponse() as HttpWebResponse; response.Cookies = myHttpWebRequest.CookieContainer.GetCookies(uri); foreach (Cookie c in response.Cookies) { string s = c.Name + c.Value + c.Domain + c.Path; } string location = response.Headers.Get("Location"); #region read bool isGzip = !string.IsNullOrEmpty(response.ContentEncoding) && response.ContentEncoding.ToLower() == "gzip"; Stream streamReceive = null; if (isGzip) { streamReceive = new System.IO.Compression.GZipStream(response.GetResponseStream(), System.IO.Compression.CompressionMode.Decompress); } else { streamReceive = response.GetResponseStream(); } sr = new StreamReader(streamReceive, Encoding.GetEncoding(codename)); if (response.ContentLength > 1) { strResult = sr.ReadToEnd(); } else { char[] buffer = new char[256]; int count = 0; StringBuilder sb = new StringBuilder(); while ((count = sr.Read(buffer, 0, buffer.Length)) > 0) { sb.Append(new string(buffer)); } strResult = sb.ToString(); } #endregion sr.Close(); response.Close(); return strResult; } }}