如何在Linq中使用IN子句

Question

我有一個如下的Sql查詢，請幫助我如何在Linq中編寫確切的查詢。 謝謝

select count(ExpiredProjectID) from AssignedExpiredProjects where ExpiredProjectID IN (select id from ExpiredProjectsTracking)

Answer 1

試試這個代碼......

var projIDs= (from ept in _context.ExpiredProjectsTracking
              select ept.id).ToList();

int resultCount= (from apt in _context.AssignedExpiredProjects
                  where projIDs.Contains(apt.ExpiredProjectID)
                  select apt.ExpiredProjectID).Count();

Answer 2

var searchList = context.ExpiredProjectsTracking.ToList();

var sum = context.AssignedExpiredProjects.Count(x => searchList.Contains(x.Id))