LINQ相当于SQL查询 “不在（选择查询）”

Question

我的SQL代码如下：

select UserId,UserName 
from aspnet_Users 
where UserId not in (select UsersId from tbluser where active='true') 

什么是等效的LINQ表达？

Answer 1

我第一次尝试使用LiNQ在C#

var result = from y in aspnet_Users 
      where !(
         from x in tblUser 
         where x.active == "true" 
         select x.UsersID 
        ).Contains(y.UserId) 
      select y;     
      -- OR // select new { y.UserId, y.UserName}; 

SOURCE

• The NOT IN clause in LINQ to SQL

Answer 2

var query = 
    from c in aspnet_Users 
    where !(from o in tbluser where o.active=="true" 
      select o.UserId) 
      .Contains(c.UserId) 
    select c;