Group By with LINQ

Ola — Mon, 24 Nov 2008 12:16:58 +0000

Today i wanted to do a group by query with LINQ wich is something i never done before. I turned out to be kind of easy.

If you just want to group by a single field.

(from s in db.CrewStatsSet
where s.LogDate >= date1 && s.LogDate <= date2 && s.Action == action
group s by s.User.nick into g
orderby g.Count() descending
select new CrewStatsData
{
Nick = g.Key,
Count = g.Count(),
}).ToList();

And if you need to group by multiple fields.

(from s in db.CrewStatsSet
where s.LogDate >= date1 && s.LogDate <= date2 && s.Action == action
group s by new { s.User.nick, s.Action, s.User.userID } into g
orderby g.Count() descending
select new CrewStatsData
{
Nick = g.Key.nick,
Count = g.Count(),
ActionId = g.Key.Action,
UserId = g.Key.userID
}).ToList();

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Group By with LINQ