/// <summary>
        /// 删除类别
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public ActionResult DeleteCategory(string id)
        {
            int sysno = 0;

            if (!string.IsNullOrEmpty(id) && int.TryParse(id, out sysno))
            {
                TopicCategory tc = new TopicCategory();
                tc.SysNo = sysno;
                TopicService.DeleteTopicCategory(tc);
                return(Json(new AjaxResult()
                {
                    Success = true
                }));
            }
            else
            {
                return(Json(new AjaxResult()
                {
                    Success = false, Message = "传入参数错误."
                }));
            }
        }