正则双重过滤 /// splitKey1 第一个正则式匹配 /// splitKey2 匹配结果中再次匹配进行替

        /// <summary>
        /// 正则双重过滤
        /// splitKey1 第一个正则式匹配
        /// splitKey2 匹配结果中再次匹配进行替换
        /// </summary>
        /// <param name="content"></param>
        /// <param name="splitKey1"></param>
        /// <param name="splitKey2"></param>
        /// <param name="newChars"></param>
        /// <returns></returns>
        private static string GetReplace(string content, string splitKey1, string splitKey2, string newChars)
        {
            if (splitKey1 != null && splitKey1 != "" && splitKey2 != null && splitKey2 != "")
            {
                Regex rg = new Regex(splitKey1);
                System.Text.RegularExpressions.MatchCollection mc = rg.Matches(content);

                foreach (System.Text.RegularExpressions.Match mc1 in mc)
                {
                    string oldChar = mc1.ToString();
                    string newChar = new Regex(splitKey2, RegexOptions.IgnoreCase).Replace(oldChar, newChars);
                    content = content.Replace(oldChar, newChar);
                }
                return content;
            }
            else
            {
                if (splitKey2 != null && splitKey2 != "")
                {
                    Regex rg = new Regex(splitKey2, RegexOptions.IgnoreCase);
                    return rg.Replace(content, newChars);
                }
            }
            return content;
        }