AddRange Linq查询之前的OrderByDescending

Question

我有两个List，promolist和packagelist。 packagelist数据必须是第一个packagelist，list必须OrderByDescending和ThenByDescending level然后totalclick

贝娄是我试过的

promolist.OrderByDescending(o =>  o.packagelevel.level).ThenByDescending(o => o.totalclick);
promolist.AddRange(packagelist.OrderByDescending(o => o.packagelevel.level).ThenByDescending(o => o.totalclick));
return promolist;

结果几乎是我想要的，promolist在packagelist之前，packagelist正确排序，只有 promolist没有做任何{{1 }或OrderByDescending

Answer 1

OrderBy的结果是您需要分配和评估的新枚举。你不会对结果做任何事情。

你需要这个：

promolist = promolist.OrderByDescending(o =>  o.packagelevel.level)
                     .ThenByDescending(o => o.totalclick)
                     .ToList();