string  webDocContent="":
string strPattern=@"a[\s]+href=(?<Link>[^\s>]+)[^>]*>(?<Text>[^<]*)</a>";
            MatchCollection Matches=Regex.Matches(webDocContent,strPattern,RegexOptions.IgnoreCase|RegexOptions.Compiled);
            foreach(Match NextMatch in Matches)
            {
                string URL=NextMatch.Groups["Link"].Value.ToString().Trim();
                string URLText=NextMatch.Groups["Text"].Value.ToString().Trim();
                Response.Write(URL);
                Response.Write(URLText);
            }
判断URLText内容是否为下一页