c# - 在实体框架中使用 linq 的不同记录

Question

根据这个查询，我得到所有具有相同 id 的记录，但我只想要一次该记录

var query = (from c in CompObj.EmpInfoes
                     join d in CompObj.Leaves on c.EmpID equals d.ProjectManagerID
                     where c.RoleID == 4 || c.RoleID == 2
                     select new { c.EmpName, c.EmpID });

Answer 1

var query = (from c in CompObj.EmpInfoes
             join d in CompObj.Leaves on c.EmpID equals d.ProjectManagerID
             where c.RoleID == 4 || c.RoleID == 2
             select new { c.EmpName, c.EmpID })
    .Distinct();

或者你还需要什么？

Answer 2

只需在末尾添加 .Distinct() 即可。