public async Task <IActionResult> List(int page = 1, int pageSize = 10, string title = "")
        {
            string where = $" and type={(int)Entity.CommentType.抢购评论}" + _comService.GetWhere();
            if (!string.IsNullOrEmpty(title))
            {
                where += $" and a.title like '%{title}%' ";
            }
            int        total;
            DataSet    ds       = _Service.GetPage(page, pageSize, "c.Praise desc,c.id desc", out total, where);
            IPagedList pageList = new PagedList <DataRow>(ds.Tables[0].Select(), page, pageSize, total);

            ViewBag.PageSize = pageSize;
            if (Request.Headers.ContainsKey("x-requested-with"))
            {
                return(View("_Table", pageList));
            }
            return(View(pageList));
        }