采集系统万能正则表达式

由于经常要写一些采集的程序，下面的三个函数是采集中的很常用的函数。姑且叫采集系统万能正则表达式吧。全部源码见
http://www.softbk.com/news.asp?id=3564 <script type="text/javascript"><!-- google_ad_client = "pub-4334685396432654"; //468x15, 创建于 07-12-5 google_ad_slot = "3722935453"; google_ad_width = 468; google_ad_height = 15; //--></script><script src="http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript"> </script>     欢迎一起交流

//获取页面的html源码
 public  string GetHtmlSource(string Url, string charset)
        {
            if (charset == "" || charset == null) charset = "gb2312";
            string text1 = "";
            try
            {
                HttpWebRequest request1 = (HttpWebRequest)WebRequest.Create(Url);
                HttpWebResponse response1 = (HttpWebResponse)request1.GetResponse();
                Stream stream1 = response1.GetResponseStream();
                StreamReader reader1 = new StreamReader(stream1, Encoding.GetEncoding(charset));
                text1 = reader1.ReadToEnd();
                stream1.Close();
                response1.Close();
            }
            catch (Exception exception1)
            {
            }
            return text1;
        }

 public string SniffwebCode(string code, string wordsBegin, string wordsEnd)
        {
            string NewsTitle = "";
            Regex regex1 = new Regex("" + wordsBegin + @"(?<title>[\s\S]+?)" + wordsEnd + "", RegexOptions.Compiled | RegexOptions.IgnoreCase);
            for (Match match1 = regex1.Match(code); match1.Success; match1 = match1.NextMatch())
            {
                NewsTitle = match1.Groups["title"].ToString();
            }
            return NewsTitle;

        }

 public ArrayList SniffwebCodeReturnList(string code, string wordsBegin, string wordsEnd)
        {
            ArrayList urlList = new ArrayList();
            //string NewsTitle = "";
            Regex regex1 = new Regex("" + wordsBegin + @"(?<title>[\s\S]+?)" + wordsEnd + "", RegexOptions.Compiled | RegexOptions.IgnoreCase);
            for (Match match1 = regex1.Match(code); match1.Success; match1 = match1.NextMatch())
            {
                urlList.Add(match1.Groups["title"].ToString());
            }
            return urlList;

        }