修改版,由于取的网站多对应加了修正.我就没发新贴了.
1，同一个用户(或浏览器)的不同请求共享同一个变量储存空间，就称其为Session（会话）
Session内的变量保存在服务器中。
用SessionID以区别不同的Session（会话），因为不是一个用户在请求。
2，众所周知HTTP是无连接的，所以服务端和客户端交流时协商好使用些什么标志来保持Session（会话）状态，于是出现了Cookie(可能你更熟悉Cookie的其他用途)。这便是HTTP协议的状态保持机制，是标准，所有的浏览器都应该支持。为什么不用IP标识？呵呵，因为有人用代理啊，早期的代理服务器是很普遍的连到Internet的方式。
So, 在Cookie中放置一个类似于SessionID的Value，同一个客户端在与服务端交互式，该ID便被来回传递，服务端便可依此建立若干变量，就是Session变量。不同的客户端因为SessionID不同，所以访问服务器时得到的Session变量就不同。
验证原理服务器的Session会在客户端产生临时COOKIESS.
APS.NET网站就会生成ASP.NET_SessionId=hjguqsn34ai3h3aattozr2fy
PHP,JSP网站生成的JSESSIONID=4D9D2F0B65C77385C43CE4EE22D0536E
就是看什么服务器而以
取了登陆成功后的COOKIESS,只要电脑不清空COOKIESS,那就可以做成免登陆了.
换句话A电脑的COOKIESS,不能在B电脑上用.
工具WPE之类的网络探嗅器.
先记录一次成功登陆时所发送的信息.
找信息中的POST,和GET
这网上打资料都没有完整的资料特别是验证码登陆。
其实我这都是从网上收集整理出来的的。做的不是太好。
使用的两个WebClient，HttpWebRequest。NET的类分别做出一个静态类和动态类。
静态类GetHtml 支持一般的网页取数据和POET提交，但不能支持验证码，自动识别网页编码也可以手动输入网页编码。不过最好是手动输入那样会让程序少做运行代码。
System.Collections.Specialized.NameValueCollection PostVars =new System.Collections.Specialized.NameValueCollection()
PostVars.Add("uid","name");
PostVars.Add("pwd","123456");
string tmphtml= GetStrHtmlPost(url,PostVars);
动态类PostWeb 支持验证码、验证用户、登陆过会产生COOKIES字符串，第二次运行程序时可通过COOKIES而不用再次登陆。
PostWeb web=new PostWeb();
web.GetCode(验证码地址);
string tmplogin=web.LoginPost("http://www.mystand.com.cn/");
if(tmplogin.Contains(条件))
{
string cookie= web.cookieHeader;//保存到文件中下次直接付到类就可免登陆
web.GetPage("http://www.mystand.com.cn/", "http://www.mystand.com.cn/");
}
PostWeb web=new PostWeb();
web.cookieHeader=cookie；//把保存文件中的cookie付到类中
web.GetPage("http://www.mystand.com.cn/", "http://www.mystand.com.cn/");
Code
using System;using System.Collections.Generic;using System.Text;using System.Net;using System.Text.RegularExpressions;using System.IO;using System.IO.Compression;namespace Manager.Net.Html
{
HTML相关类#region HTML相关类 /**//// <summary>
/// HTML相关
/// </summary> public class CHtml { 过滤 Sql 语句字符串中的注入脚本#region 过滤 Sql 语句字符串中的注入脚本 /**//// <summary> /// 过滤 Sql 语句字符串中的注入脚本 /// </summary> /// <param name="source">传入的字符串</param> /// <returns></returns> public static string FilterSql(string source) { //单引号替换成两个单引号 source = source.Replace("'", "''"); source = source.Replace("\"", "“"); source = source.Replace("|", "｜"); //半角封号替换为全角封号，防止多语句执行 source = source.Replace(";", "；"); //半角括号替换为全角括号 source = source.Replace("(", "（"); source = source.Replace(")", "）"); /**//**/ /**////////////////要用正则表达式替换，防止字母大小写得情况//////////////////// //去除执行存储过程的命令关键字 source = source.Replace("Exec", ""); source = source.Replace("Execute", ""); //去除系统存储过程或扩展存储过程关键字 source = source.Replace("xp_", "x p_"); source = source.Replace("sp_", "s p_"); //防止16进制注入 source = source.Replace("0x", "0 x"); return source; } #endregion 输出HTML#region 输出HTML /**//// <summary> /// 输出HTML /// </summary> /// <param name="Stream">流</param> /// <param name="Encod">编码</param> /// <returns></returns> public static string HtmlStr(System.IO.Stream Stream, Encoding Encod) { System.IO.StreamReader sr; if (Encod != null) { sr = new System.IO.StreamReader(Stream, Encod); return sr.ReadToEnd(); } else { sr = new System.IO.StreamReader(Stream, Encoding.Default); return sr.ReadToEnd(); } } #endregion 检验用户提交的URL参数字符里面是否有非法字符,如果有则返回True.防止SQL注入.#region 检验用户提交的URL参数字符里面是否有非法字符,如果有则返回True.防止SQL注入. /**//// <summary> /// 检验用户提交的URL参数字符里面是否有非法字符,如果有则返回True.防止SQL注入. /// </summary> /// <param name="str">(string)</param> /// <returns>bool</returns> public static bool VerifyString(string str) { string strTmp = str.ToUpper(); if (strTmp.IndexOf("SELECT ") >= 0 || strTmp.IndexOf(" AND ") >= 0 || strTmp.IndexOf(" OR ") >= 0 || strTmp.IndexOf("EXEC ") >= 0 || strTmp.IndexOf("CHAR(") >= 0) { return true; } strTmp.Replace("'", "＇").Replace(";", "；"); return false; } #endregion 匹配页面的图片地址#region 匹配页面的图片地址 /**//// <summary> /// 匹配页面的图片地址 /// </summary> /// <param name="HtmlCode"></param> /// <param name="imgHttp">要补充的http://路径信息</param> /// <returns></returns> public static string GetImgSrc(string HtmlCode, string imgHttp) { string MatchVale = ""; string Reg = @"<img.+?>"; foreach (Match m in Regex.Matches(HtmlCode.ToLower(), Reg)) { MatchVale += GetImg((m.Value).ToLower().Trim(), imgHttp) + "|"; } return MatchVale; } #endregion 匹配 /**//// <summary> /// 匹配<img src="" />中的图片路径实际链接 /// </summary> /// <param name="ImgString"><img src="" />字符串</param> /// <returns></returns> public static string GetImg(string ImgString, string imgHttp) { string MatchVale = ""; string Reg = @"src=.+\.(bmp|jpg|gif|png|)"; foreach (Match m in Regex.Matches(ImgString.ToLower(), Reg)) { MatchVale += (m.Value).ToLower().Trim().Replace("src=", ""); } if (MatchVale.IndexOf(".net") != -1 || MatchVale.IndexOf(".com") != -1 || MatchVale.IndexOf(".org") != -1 || MatchVale.IndexOf(".cn") != -1 || MatchVale.IndexOf(".cc") != -1 || MatchVale.IndexOf(".info") != -1 || MatchVale.IndexOf(".biz") != -1 || MatchVale.IndexOf(".tv") != -1) return (MatchVale); else return (imgHttp + MatchVale); } #endregion 获取页面的链接正则#region 获取页面的链接正则 /**//// <summary> /// 获取页面的链接正则 /// </summary> /// <param name="HtmlCode"></param> /// <returns></returns> public static string GetHref(string HtmlCode) { string MatchVale = ""; string Reg = @"(h|H)(r|R)(e|E)(f|F) *= *('|"")?((\w|\\|\/|\.|:|-|_)+)[\S]*"; foreach (Match m in Regex.Matches(HtmlCode, Reg)) { MatchVale += (m.Value).ToLower().Replace("href=", "").Trim() + "|"; } return MatchVale; } #endregion 去HTML标记#region 去HTML标记 /**//// <summary> /// 去HTML标记 /// </summary> /// <param name="strhtml">HTML页面</param> /// <returns></returns> public static string RemoveHTML(string strhtml) { string stroutput = strhtml; Regex regex = new Regex(@"<[^>]+>|</[^>]+>"); stroutput = regex.Replace(stroutput, ""); return stroutput.Trim(); } #endregion /**//// <summary> /// 去中文 /// </summary> /// <param name="strhtml">HTML页面</param> /// <returns></returns> public static string RemoveChinese(string strhtml) { string stroutput = strhtml; Regex regex = new Regex(@"[\u4e00-\u9fa5]"); stroutput = regex.Replace(stroutput, ""); return stroutput.Trim(); } 去UBB标记#region 去UBB标记 /**//// <summary> /// 去UBB标记 /// </summary> /// <param name="strhtml">HTML页面</param> /// <returns></returns> public static string RemoveUBB(string strhtml) { string stroutput = strhtml; Regex regex = new Regex(@"\[[^[\[\]]*]"); stroutput = regex.Replace(stroutput, ""); return stroutput.Trim(); } #endregion 去UBB和HTML标记#region 去UBB和HTML标记 /**//// <summary> /// 去UBB和HTML标记 /// </summary> /// <param name="strhtml">HTML页面</param> /// <returns></returns> public static string RemoveUBBHTML(string strhtml) { return RemoveUBB(RemoveHTML(strhtml)); } #endregion 取网页编码#region 取网页编码 /**//// <summary> /// 取网页编码 /// </summary> /// <param name="strHtml">HTML页面</param> /// <returns>返回编码</returns> public static Encoding GetEncoding(string strHtml) { string pattern = @"(?i)\bcharset=(?<charset>[-a-zA-Z_0-9]+)"; string charset = Regex.Match(strHtml, pattern).Groups["charset"].Value; if (charset.Length <= 0) { if (strHtml.Contains("charset=\"")) charset = Manager.Text.StringEx.GetStringMiddle(strHtml, "charset=\"", "\""); } if (charset.Length <= 0) { if (strHtml.Contains("charset=")) charset = Manager.Text.StringEx.GetStringMiddle(strHtml, "charset=", "\""); } if (charset.Length <= 0) { charset = Encoding.UTF8.BodyName; } try { return Encoding.GetEncoding(charset); } catch (Exception) { return Encoding.Default; } } #endregion 取IE版本#region 取IE版本 /**//// <summary> /// 取IE版本 /// </summary> /// <returns></returns> public static string GetIEVersion() { using (Microsoft.Win32.RegistryKey versionKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"Software\Microsoft\Internet Explorer")) { String version = versionKey.GetValue("Version").ToString(); return version; } } #endregion } #endregion 模拟网页提交数据类#region 模拟网页提交数据类 /**//// <summary> /// 模拟网页提交数据 /// </summary> public class PostWeb { 属性#region 属性 private string otherUrl = ""; /**//// <summary> /// 特别URL /// </summary> public string OtherUrl { set { otherUrl= value; } get { return otherUrl; } } private string cookieHeader = ""; /**//// <summary> /// Cookies /// </summary> public string CookieHeader { set { cookieHeader = value; } get { return cookieHeader; } } private string encod = ""; /**//// <summary> /// 网页编号 /// </summary> public string Encod { set { encod = value; } get { return encod; } } private bool setCookies = false; /**//// <summary> /// 自动设Cookies /// </summary> public bool SetCookies { set { setCookies = value; } get { return setCookies; } } private bool isProxy = false; /**//// <summary> /// 自动设是否使用代理 /// </summary> public bool IsProxy { set { isProxy = value; } get { return isProxy; } } private string proxyaddress = ""; /**//// <summary> /// 代理地址 /// </summary> public string Proxyaddress { set { proxyaddress = value; } get { return proxyaddress; } } private string credentialUserName = ""; /**//// <summary> /// 密码验证用户 /// </summary> public string CredentialUserName { set { credentialUserName = value; } get { return credentialUserName; } } private string credentialPassWord = ""; /**//// <summary> /// 密码验证密码 /// </summary> public string CredentialPassWord { set { credentialPassWord = value; } get { return credentialPassWord; } } private string credentialDoMain = ""; /**//// <summary> /// 密码验证域名 /// </summary> public string CredentialDoMain { set { credentialDoMain = value; } get { return credentialDoMain; } } Encoding tmpEncod; #endregion 相关设置#region 相关设置 代理#region 代理 /**//// <summary> /// 代理 /// </summary> /// <param name="request"></param> private void ProxySetting(HttpWebRequest request) { if (IsProxy) { WebProxy proxy = WebProxy.GetDefaultProxy();//获取IE缺省设置 //如果缺省设置为空，则有可能是根本不需要代理服务器，如果此时配置文件中也未配置则认为不需Proxy if (proxy.Address == null && !String.IsNullOrEmpty(proxyaddress)) proxy.Address = new Uri(proxyaddress);//按配置文件创建Proxy 地置 request.Proxy = proxy; } } #endregion 身份验证#region 身份验证 /**//// <summary> /// 身份验证 /// </summary> /// <param name="request"></param> private void NetworkCredentialSetting(HttpWebRequest request) { if (!String.IsNullOrEmpty(CredentialUserName) && !String.IsNullOrEmpty(CredentialPassWord) && !String.IsNullOrEmpty(CredentialDoMain)) { request.PreAuthenticate = true; NetworkCredential myCred = new NetworkCredential(CredentialUserName, CredentialPassWord, CredentialDoMain); request.Credentials = myCred; request.SendChunked = false; } } #endregion 设置网页编码#region 设置网页编码 /**//// <summary> /// 设置网页编码 /// </summary> void SetEncod(string cod) { if (tmpEncod == null) { if (Encod.Length > 0) tmpEncod = Encoding.GetEncoding(Encod); else tmpEncod = Encoding.GetEncoding(cod); } } #endregion 模拟设置#region 模拟设置 /**//// <summary> /// 模拟网页设置 /// </summary> /// <param name="myHttpWebRequest"></param> private void WebConfig(HttpWebRequest myHttpWebRequest) { myHttpWebRequest.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-shockwave-flash, */*"; myHttpWebRequest.AllowAutoRedirect = true; myHttpWebRequest.KeepAlive = true; myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MAXTHON 2.0)"; myHttpWebRequest.Timeout = 3000; } #endregion #endregion 验证码#region 验证码 /**//// <summary> /// 验证码，并保存文件 /// </summary> /// <param name="strURL">验证码地址</param> /// <param name="dir">目录</param> /// <param name="filename">文件</param> /// <param name="imageFormat">格式</param> public void GetCode(string strURL, string dir, string filename, System.Drawing.Imaging.ImageFormat imageFormat) { string path = ""; if (!String.IsNullOrEmpty(dir)) { System.IO.Directory.CreateDirectory(dir); path = dir + "\\"; } string FileNamePath = path + filename; System.Drawing.Image code = GetCode(strURL); code.Save(FileNamePath, imageFormat); code.Dispose(); } /**//// <summary> /// 验证码，返回Bitmap /// </summary> /// <param name="strURL">验证码地址</param> /// <returns></returns> public System.Drawing.Image GetCode(string strURL) { HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strURL); ProxySetting(myHttpWebRequest); NetworkCredentialSetting(myHttpWebRequest); myHttpWebRequest.Method = "GET"; myHttpWebRequest.KeepAlive = true; CookieCollection myCookies = null; CookieContainer myCookieContainer = new CookieContainer(); myHttpWebRequest.CookieContainer = myCookieContainer; try { using (HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse()) { cookieHeader = myHttpWebRequest.CookieContainer.GetCookieHeader(new Uri(strURL)); myCookies = response.Cookies; System.Drawing.Image code = System.Drawing.Image.FromStream(response.GetResponseStream(), false, false); return code; } } catch { return null; } } #endregion public string GetCookies(string strURL) { HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strURL); myHttpWebRequest.Method = "Get"; CookieCollection myCookies = null; CookieContainer myCookieContainer = new CookieContainer(); myHttpWebRequest.CookieContainer = new CookieContainer(); try { using (HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse()) { cookieHeader = myHttpWebRequest.CookieContainer.GetCookieHeader(myHttpWebRequest.RequestUri); myCookies = myHttpWebRequest.CookieContainer.GetCookies(myHttpWebRequest.RequestUri); SetEncod(response.CharacterSet); return System.Web.HttpUtility.HtmlDecode(System.Web.HttpUtility.UrlDecode(CHtml.HtmlStr(response.GetResponseStream(), tmpEncod))).Replace("\r", "").Replace("\n", "").Replace("\t", "").Replace(" ", ""); } } catch { cookieHeader = ""; return ""; } } 登陆#region 登陆 /**//// <summary> /// 功能描述：模拟登录页面，提交登录数据进行登录，并记录Header中的cookie /// </summary> /// <param name="strURL">登录数据提交的页面地址</param> /// <param name="strArgs">用户登录数据</param> /// <param name="strReferer">引用地址</param> /// <returns>可以返回页面内容或不返回</returns> public string LoginGet(string strURL, string strReferer) { HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strURL); ProxySetting(myHttpWebRequest); NetworkCredentialSetting(myHttpWebRequest); WebConfig(myHttpWebRequest); myHttpWebRequest.Referer = strReferer; myHttpWebRequest.Method = "Get"; CookieCollection myCookies = null; CookieContainer myCookieContainer = new CookieContainer(); myHttpWebRequest.CookieContainer = new CookieContainer(); if (cookieHeader.Length > 0) { myCookieContainer.SetCookies(new Uri(strURL), cookieHeader); myHttpWebRequest.CookieContainer = myCookieContainer; } try { using (HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse()) { cookieHeader = myHttpWebRequest.CookieContainer.GetCookieHeader(myHttpWebRequest.RequestUri); myCookies = myHttpWebRequest.CookieContainer.GetCookies(myHttpWebRequest.RequestUri); SetEncod(response.CharacterSet); return System.Web.HttpUtility.HtmlDecode(System.Web.HttpUtility.UrlDecode(CHtml.HtmlStr(response.GetResponseStream(), tmpEncod))).Replace("\r", "").Replace("\n", "").Replace("\t", "").Replace(" ", ""); } } catch { cookieHeader = ""; return ""; } } /**//// <summary> /// 功能描述：模拟登录页面，提交登录数据进行登录，并记录Header中的cookie /// LoginPost("http://www.mystand.com.cn/login/submit.jsp","userid=hgj0000&password=06045369","http://www.mystand.com.cn/"); /// </summary> /// <param name="strURL">登录数据提交的页面地址</param> /// <param name="strArgs">用户登录数据</param> /// <param name="strReferer">引用地址</param> /// <returns>可以返回页面内容或不返回</returns> public string LoginPost(string strURL, string strArgs, string strReferer) { HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strURL); ProxySetting(myHttpWebRequest); NetworkCredentialSetting(myHttpWebRequest); WebConfig(myHttpWebRequest); myHttpWebRequest.Referer = strReferer; myHttpWebRequest.Method = "Post"; myHttpWebRequest.ContentType = "application/x-www-form-urlencoded"; byte[] bs = Encoding.ASCII.GetBytes(strArgs); myHttpWebRequest.ContentLength = bs.Length; try { CookieCollection myCookies = null; CookieContainer myCookieContainer = new CookieContainer(); myHttpWebRequest.CookieContainer = new CookieContainer(); if (cookieHeader.Length > 0) { myCookieContainer.SetCookies(new Uri(strURL), cookieHeader); myHttpWebRequest.CookieContainer = myCookieContainer; } using (Stream reqStream = myHttpWebRequest.GetRequestStream()) { reqStream.Write(bs, 0, bs.Length); } using (HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse()) { cookieHeader = myHttpWebRequest.CookieContainer.GetCookieHeader(myHttpWebRequest.RequestUri); myCookies = myHttpWebRequest.CookieContainer.GetCookies(myHttpWebRequest.RequestUri); SetEncod(response.CharacterSet); return System.Web.HttpUtility.HtmlDecode(System.Web.HttpUtility.UrlDecode(CHtml.HtmlStr(response.GetResponseStream(), tmpEncod))).Replace("\r", "").Replace("\n", "").Replace("\t", "").Replace(" ", ""); } } catch(Exception ex){ cookieHeader = ""; return ""; } } #endregion 取数据#region 取数据 /**//// <summary> /// 功能描述：在PostLogin成功登录后记录下Headers中的cookie，然后获取此网站上其他页面的内容 /// </summary> /// <param name="strURL">获取网站的某页面的地址</param> /// <param name="strReferer">引用的地址</param> /// <returns>返回页面内容</returns> public string GetPage(string strURL, string strReferer) { HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strURL); ProxySetting(myHttpWebRequest); NetworkCredentialSetting(myHttpWebRequest); WebConfig(myHttpWebRequest); myHttpWebRequest.Method = "Get"; if (!string.IsNullOrEmpty(strReferer)) myHttpWebRequest.Referer = strReferer; myHttpWebRequest.Headers.Add("cookie:" + cookieHeader); CookieContainer myCookieContainer = new CookieContainer(); try { using (HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse()) { SetEncod(response.CharacterSet); return System.Web.HttpUtility.HtmlDecode(System.Web.HttpUtility.UrlDecode(CHtml.HtmlStr(response.GetResponseStream(), tmpEncod))).Replace("\r", "").Replace("\n", "").Replace("\t", "").Replace(" ", ""); } } catch { return ""; } } /**//// <summary> /// 功能描述：在PostLogin成功登录后记录下Headers中的cookie，然后获取此网站上其他页面的内容 /// </summary> /// <param name="strURL">获取网站的某页面的地址</param> /// <param name="strReferer">引用的地址</param> /// <returns>返回页面内容</returns> public string PostPage(string strURL, string strArgs, string strReferer) { HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(strURL); ProxySetting(myHttpWebRequest); NetworkCredentialSetting(myHttpWebRequest); WebConfig(myHttpWebRequest); myHttpWebRequest.Referer = strReferer; myHttpWebRequest.Method = "Post"; myHttpWebRequest.ContentType = "application/x-www-form-urlencoded"; byte[] bs = Encoding.ASCII.GetBytes(strArgs); myHttpWebRequest.ContentLength = bs.Length; if (cookieHeader.Length > 0) myHttpWebRequest.Headers.Add("cookie:" + cookieHeader); CookieContainer myCookieContainer = new CookieContainer(); try { using (Stream reqStream = myHttpWebRequest.GetRequestStream()) { reqStream.Write(bs, 0, bs.Length); } using (HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse()) { SetEncod(response.CharacterSet); return System.Web.HttpUtility.HtmlDecode(System.Web.HttpUtility.UrlDecode(CHtml.HtmlStr(response.GetResponseStream(), tmpEncod))).Replace("\r", "").Replace("\n", "").Replace("\t", "").Replace(" ", ""); } } catch { return ""; } } #endregion } #endregion 表态取网页数据#region 表态取网页数据 /**//// <summary> /// 表态取网页数据 /// </summary> public class GetHtml { /**//// <summary> /// 模拟提交表单POST /// System.Collections.Specialized.NameValueCollection PostVars =new System.Collections.Specialized.NameValueCollection() /// PostVars.Add("uid","name"); /// PostVars.Add("pwd","123456"); /// GetStrHtmlPost(url,PostVars) /// </summary> /// <param name="url">地址</param> /// <param name="PostVars">PostValue</param> /// <returns></returns> public static string GetStrHtmlPost(String url, System.Collections.Specialized.NameValueCollection PostVars) { if (PostVars == null) return ""; System.Net.WebClient WebClientObj = new System.Net.WebClient(); string html; try { byte[] buf = WebClientObj.UploadValues(url, "POST", PostVars); //下面都没用啦，就上面一句话就可以了 html = System.Text.Encoding.Default.GetString(buf); Encoding encoding = CHtml.GetEncoding(html); if (encoding == Encoding.UTF8) return html; return encoding.GetString(buf); } catch { } return ""; } /**//// <summary> /// 获取网页的HTML内容 /// </summary> /// <param name="url">url</param> /// <returns></returns> public static string GetStrHtml(string url) { return GetStrHtml(url, null); } /**//// <summary> /// 获取网页的HTML内容 /// </summary> /// <param name="url">URL</param> /// <param name="encoding">Encoding</param> /// <returns></returns> public static string GetStrHtml(string url, Encoding encoding) { byte[] buf = new WebClient().DownloadData(url); if (encoding != null) return encoding.GetString(buf); string html = Encoding.UTF8.GetString(buf); encoding = CHtml.GetEncoding(html); if (encoding == Encoding.UTF8) return html; return encoding.GetString(buf); } } #endregion 
}