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LINQでこのSQLクエリを実行するにはどうすればよいですか？

select * from chat c
left outer join lead s on c.key = s.id
where (typeId = 5 AND c.key = @clientId) OR (c.typeId = 4 AND s.clientId = @clientId)

またはこのSQLクエリ-同じ、同じ

select * from chat c
where (typeId = 5 AND c.key = @clientId) OR (typeId = 4 AND c.key in (select id from lead where clientId = @clientId))

私が持っているもの：

var chatter = (from chat in linq.Chat
             join lead in linq.Lead
                on chat.key equals lead.Id.ToString() into clientLeads
                from cl in clientLeads.Where(l => l.clientId == clientId).DefaultIfEmpty()
            where (chat.typeId == 5 && chat.key == clientId.ToString()) ||
                (chat.typeId == 4 && chat.key == cl.Id.ToString())
                select chat).WithPath(prefetchPath).OrderByDescending(c => c.CreatedDate);

上記のLINQクエリは、後者のWHERE句の結果を生成しませんが、何が欠けていますか？

4

1 に答える 1

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2番目のクエリをlinqに変換しました。

var leadIds = linq.Lead.Where(l => l.clientId == clientId.ToString()).Select(l => l.id);
var chatter = from chat in linq.Chat
              where (chat.typeId == 5 && chat.key == clientId.ToString()) ||
                    (chat.typeId == 4 && leadIds.Contains(chat.key));
于 2012-08-09T11:15:08.840 に答える