使用linq获取错误加入

Question

使用linq连接两个表时出错，错误为The name 'u' does not exist in the current context

这是我的代码

from t in Teams
join u in Users on t.TeamId equals u.TeamId  into g
where (t.TeamName.Contains("Pr"))  && (t.Deleted != true) ||(u.FirstName.Contains("Ch"))
select new { t.TeamId,t.TeamName, t.Description,UserId=g.Count()}

Answer 1

我已将其更改为先进行连接，然后对where进行过滤，然后进行分组。希望这有效：

from t in Teams
join u in Users on t.TeamId equals u.TeamId
where (t.TeamName.Contains("Pr")) && (t.Deleted != true) || (u.FirstName.Contains("Ch"))
group new { t.TeamId, t.TeamName, t.Description } by new { t.TeamId, t.TeamName, t.Description } into g
select new { g.Key.TeamId, g.Key.TeamName, g.Key.Description, UserId = g.Count() };