LINQ中的子查询

Question

我有一个SQL查询，如下所示

SELECT ui.PageStyleCss
 FROM UserImages ui 
 WHERE ui.UserImageId IN 
  ( SELECT inv.UserImageId 
   FROM Invitation inv
   JOIN InviteeEmails invEmails ON 
   inv.InviteID = invEmails.InviteID
   WHERE invEmails.InviteGUID = @InviteGUID
  )

我怎样才能在LINQ中写这个？

由于

Answer 1

我猜测你正在使用LINQ to SQL。如果你提到这个，以及你的模型的细节，那将是很好的。猜测它的结构......

var q = from ui in Context.UserImages
        where ui.Invitations.Any(i => i.InviteeEmails.Any(e => e.InviteGuid = inviteGuid))
        select ui.PageStyleCss;

Answer 2

from ui in db.UserImages
where (from inv in db.Invitations
       join invEmails from InviteeEmails 
           on inv.InviteId equals invEmails.InviteId
       where invEmails.InviteGUID == inviteGUID
       select inv.UserImageId).Contains(ui.UserImageId)
select ui.PageStyleCss

（不确定是否编译）

我必须假设有一种更好的方式......这几乎是一种直接翻译。