public JsonResult Index(int?PageIndex)
        {
            int _PageSize = 30;
            var _List     = manager.SelectBy(_PageSize, PageIndex);

            if (_List != null && _List.Count > 0)
            {
                return(Json(new
                {
                    ArticleList = _List.Select(p => new
                    {
                        //文章阅读时间
                        CurrentOperateTime = p.CurrentOperateTime.ToString("yyyy-MM-dd HH:mm:ss"),
                        //文章阅读次数
                        CurrentClickCount = p.CurrentClickCount
                    })
                }, JsonRequestBehavior.AllowGet));
            }
            else
            {
                return(Json(new { ArticleList = "" }, JsonRequestBehavior.AllowGet));
            }
        }