linq 中怎么表达 SQL中的 not in
select * from stuInfo where stuNo not in(select stuNo from StuMarks)
怎么用 Linq 进行书写。 求解谢谢！


[解决办法]
all的写法：
var query = db.stuInfo.Where(x => db.StuMarks.All(y => y.stuNo != x.stuNo));

join的写法

C# code

var query = from x in db.stuInfo            join y in db.StuMarks on x.stuNo equals y.stuNo into j            from item in j.DefaultIfEmpty(default(StuMark类型))            where item == default(StuMark类型)            select x;