c# - Linq where in 子句

Question

我有层次结构，其中部门包含团队，团队包含代表。我想要做的是获取给定部门下存在的代表列表。我试过这样做:

var teams = from tms in db.Teams
            where tms.DepartmentID == DepartmentID
            select tms;

var TeamDelegates = from tds in db.J_TeamDelegates
                    where tds.TeamID in teams.TeamID //error here
                    select tds;

但团队集合不允许您像引用集合一样引用特定属性。我想说的是“在团队集合中选择所有具有 TeamID 的代表。”

Answer 1

var TeamDelegates = from tds in db.J_TeamDelegates
                    where teams.Any(x => x.TeamID == tds.TeamID)
                    select tds;