/// <summary>
        /// 廣告主搜尋
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public string AdvertisersSearch(string key, long siteId)
        {
            var result = AdvertisementDAO.SearchAdvertisersItems(key, siteId);

            return(Newtonsoft.Json.JsonConvert.SerializeObject(result, new Golbal.Int64Converter()));
        }