解析WEB中所有URL

static void Main(string[] args)              {                    HttpWebHelper httpWebHelper = new HttpWebHelper();                  string webCodeStr = "utf-8";                  string referer = @"http://www.cnblogs.com/";                  Encoding webcode = Encoding.GetEncoding(webCodeStr);                  string htmlText = httpWebHelper.SimpleDoPostWrapper(referer, "get", webcode, null, referer);                  string[] urls = GetHtmlHrefUrlList(htmlText);         ...