c# - 如何在 Entity Framework 中使用 'In' SQL 关键字？

Question

这是我的SQL命令

SELECT KEY,NAME
from  COMPANY c 
WHERE     KEY IN (select KEY from USER_COMPANY  where UserId = @UserId)
order by NAME asc

所以我想将它转换为 Entity Framework 。

我这样试试

 var userCompany = (from u in db.USER_COMPANY
                         where u.UserId == UserId 
                         select(u.KEY));

            var user = (from c in db.COMPANY
                        where (c => userCompany.Contains(c.KEY)
                        select c);

但它不起作用。

如何在 Entity Framework 中使用 SQL IN 关键字？

Answer 1

试试这个:

var query = from c in db.COMPANY
            where (from u in db.USER_COMPANY
                   where u.UserId == UserId
                   select u.KEY).Contains(c.KEY)
            orderby c.NAME
            select c.KEY, c.NAME;