c# - LINQ LEFT JOIN where 子句不起作用

Question

我需要返回所有事件的列表以及用户对事件可能拥有的任何回复。但是，无论我传递的用户名如何，它都会返回每个 rsvp。我的 linq 查询 ->

   return (from events in this._context.Context.Events
           join rsvps in (this._context.Context.RSVPs
                          .Where(o=> o.UserName == userName))
           on events equals rsvps.Event into re
           from rsvps in re.DefaultIfEmpty()
           select events);

关系是
Events.EventID = RSVPs.EventID

Answer 1

from e in _context.Context.Events
join r in _context.Context.RSVPs.Where(o => o.UserName == userName)
    on e.EventID equals r.EventID into g
select new {
    Event = e,
    Rsvps = g
};