如何将“SELECT col，COUNT（*）”转换为Linq表达式？

Question

我有这个查询

SELECT Reaction, COUNT(*) as 'Votes' FROM Member_Reaction mr
    WHERE mr.[Entitiy ID] = '259F16A0-9635-4F58-B645-0AEBAAC09D46'
    GROUP BY Reaction

如何将其转换为Linq？

Answer 1

类似的东西：

var query = from item in db.MemberReactions
            where item.ID == id
            group item by item.Reaction into g
            select new { Reaction = g.Key, Count = g.Count() };

（其中id是您要查找的ID - 作为GUID，字符串或任何正确的类型。）