sql - 从 linq 中的 sql 中选择一些 id

Question

嗨，我正在使用下面的查询从 table1 中选择 studentId 和 Score 现在我想选择我从 table2 中选择他们的 id 的用户，我如何使用 id 选择它？我可以使用此查询选择用户，
from v in dc.tbl_Students select v但我想选择一些我有他们的 ID 的用户。

var qBestMan = (from T in (((from tbl_ActPoints in dc.tbl_ActPoints
                                      select new
                                      {
                                          StudentId = (int?)tbl_ActPoints.StudentId,
                                          Score = (int?)tbl_ActPoints.Score
                                      }).Concat(
                from tbl_EvaPoints in dc.tbl_EvaPoints
                select new
                {
                    StudentId = (int?)tbl_EvaPoints.StudentId,
                    Score = (int?)tbl_EvaPoints.Score
                })))
                         group T by new
                         {
                             T.StudentId
                         } into g
                         orderby g.Sum(p => p.Score) descending
                         select new
                         {
                             g.Key.StudentId,
                             HighScoreUser = g.Sum(p => p.Score)
                         }).ToArray();

Answer 1

尝试这样的事情：

        //qBestMan must be a List, or a IEnumarable and not a Array. Remove the .ToArray() at the end, or substitute it by .ToList()
        var Result =    from users in dc.tbl_Students
                        join bestMen in qBestMan on bestMen.StudentId equals users.userid                             
                        select new
                        {
                            //fields that you want
                            example = users.example,
                            other = bestMen.other
                        };