/// <summary>
        /// 正则表达式取值
        /// </summary>
        /// <param name="HtmlCode">源码</param>
        /// <param name="RegexString">正则表达式</param>
        /// <param name="GroupKey">正则表达式分组关键字</param>
        /// <param name="RightToLeft">是否从右到左</param>
        /// <returns></returns>
        public static string[] GetRegValues(string HtmlCode, string RegexString, string GroupKey, bool RightToLeft)
        {
            MatchCollection m;
            Regex r;
            if (RightToLeft)
            {
                r = new Regex(RegexString, RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.RightToLeft);
            }
            else
            {
                r = new Regex(RegexString, RegexOptions.IgnoreCase | RegexOptions.Singleline);
            }
            m = r.Matches(HtmlCode);
            string[] MatchValue = new string[m.Count];
            for (int i = 0; i < m.Count; i++)
            {
                MatchValue[i] = m[i].Groups[GroupKey].Value.Trim() ;
            }
            return MatchValue;
        }