EF 查询异常
本帖最后由 wrost 于 2013-10-11 23:39:43 编辑 DateReceive 的类型是 DateTime？
估计出错在这里

问题：该怎么写？

DateTime dt = inbox_One.DateReceive.Value;

next_Mail.inbox = db.Inbox.Include("Mail.RegisteredUsers").Include("RegisteredUsers").
Where(a =>  a.LoginName == loginName && a.DateReceive.Value  <= dt).OrderByDescending(a => a.DateReceive.Value).First();

[解决办法]
a.LoginName == loginName && a.DateReceive.HasValue && a.DateReceive.Value <= dt