/// <summary>
        /// 删除数据
        /// </summary>
        /// <returns>返回Json串</returns>
        public string DeleteQtbase()
        {
            long id = Convert.ToInt64(System.Web.HttpContext.Current.Request.Params["id"]);  //主表主键

            var deletedresult = CorrespondenceSettingsService.DeleteQtbase(id);

            return(DataConverterHelper.SerializeObject(deletedresult));
        }