如何在Linq中訂購組結果？

Question

我有以下linq查詢，它工作正常。我不知道我是如何訂購該組的結果。

from a in Audits 
join u in Users on a.UserId equals u.UserId 
group a by a.UserId into g 
select new { UserId = g.Key, Score = g.Sum(x => x.Score) } 

結果目前按UserId升序排列。我在分數下降後。

謝謝:)

Answer 1

只需添加排序依據條款;-)

from a in Audits 
join u in Users on a.UserId equals u.UserId 
group a by a.UserId into g 
let score = g.Sum(x => x.Score) 
orderby score descending 
select new { UserId = g.Key, Score = score }; 

Answer 2

var results = 
(from a in Audits 
join u in Users on a.UserId equals u.UserId 
group a by a.UserId into g 
select new { UserId = g.Key, Score = g.Sum(x => x.Score) }) 
.OrderByDescending(p=>p.Score); 

希望這將解決您的問題，比前一個更容易;）

乾杯