//获取网页HTML
public static string GetHtml4Url(string url)
    {
        HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);
        req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705;)";
        req.Method = "POST";
        req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
        req.Headers.Add("Accept-Language: en-us,en-ru,en,ru;q=0.5");
        req.KeepAlive = true;
        req.Headers.Add("Keep-Alive: 300");
        req.Referer = url;
        req.ContentType = "application/x-www-form-urlencoded";
        HttpWebResponse response = (HttpWebResponse)req.GetResponse();
        StreamReader reader = new StreamReader(response.GetResponseStream(),Encoding.UTF8);
        string tmp = reader.ReadToEnd();
        reader.Close();
        return tmp;
    }

------解决方案--------------------
用抓包软件吧

------解决方案--------------------
已经给你答案了
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发送HttpWebRequest获取HTML的方法：


C# code

    public class HttpHelper
    {
        public static string contentType = "application/x-www-form-urlencoded";
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------解决方案--------------------
http://download.csdn.net/detail/sy_dingzi/4658993

------解决方案--------------------
JSESSIONID  按字面解释 应该是java的 session的标识