模拟登陆网站，抓去指定数据

            string UID = context.Request["UID"];
            string PWD = context.Request["PWD"];
            string data = string.Format("UID={0}&PWD={1}&TYPE=1", UID, PWD); //获取数据

            HttpHelper http = new HttpHelper();
            HttpItem item = new HttpItem()
            {
                URL = "http://www.hneeb.cn/web2/confrmlogin.asp",//URL     必需项    
                Encoding = System.Text.Encoding.GetEncoding("gb2312"),//URL     可选项 默认为Get   
                Method = "post",//URL     可选项 默认为Get   
                IsToLower = false,//得到的HTML代码是否转成小写     可选项默认转小写   
                Cookie = "",//字符串Cookie     可选项   
                Referer = "",//来源URL     可选项   
                Postdata = data ,//Post数据     可选项GET时不需要写   
                Timeout = 100000,//连接超时时间     可选项默认为100000    
                ReadWriteTimeout = 30000,//写入Post数据超时时间     可选项默认为30000   
                UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",//用户的浏览器类型，版本，操作系统     可选项有默认值   
                ContentType = "application/x-www-form-urlencoded",//返回类型    可选项有默认值   
                Allowautoredirect = false,//是否根据301跳转     可选项   
                //CerPath = "d:\123.cer",//证书绝对路径     可选项不需要证书时可以不写这个参数   
                //Connectionlimit = 1024,//最大连接数     可选项 默认为1024    
                ProxyIp = "",//代理服务器ID     可选项 不需要代理 时可以不设置这三个参数    
                //ProxyPwd = "123456",//代理服务器密码     可选项    
                //ProxyUserName = "administrator",//代理服务器账户名     可选项   
                ResultType = ResultType.String
            };
            HttpResult result = http.GetHtml(item);
            string cookie = result.Cookie.Replace("path=/","").Replace(",","%2c");模拟登录获取cookie

            item = new HttpItem() //模拟get请求
            {
                URL = "http://www.hneeb.cn/web2/cgSearch_all.asp?parm=1",
                Method = "get",
                Cookie = cookie,
            };

            result = http.GetHtml(item);
            string html = result.Html;  //获取登录的html           

            context.Response.Write(html);