c# - Linq order by 没有订购任何东西

Question

// Query all records
var q =
dc.tblHelpCentreQuestions.Where(question => question.userID == UserID).Where(question => question.awaitingUserResponse == true || question.awaitingSupportResponse == true).
OrderBy(s => s.awaitingUserResponse).ThenBy(s => s.dateSubmitted).
GroupJoin(
    dc.tblHelpCentreReplies,
    question => question.ID,
    replies => replies.ticketID,
    (question, replies) => new { Question = question, RepliesCount = replies.Count() }
);

无论我在哪里查询排序，都好像是随机排序。

编辑:相同的结果与末尾的顺序:

// Query all records
var q =
dc.tblHelpCentreQuestions.Where(question => question.userID == UserID).Where(question => question.awaitingUserResponse == true || question.awaitingSupportResponse == true).
GroupJoin(
    dc.tblHelpCentreReplies,
    question => question.ID,
    replies => replies.ticketID,
    (question, replies) => new { Question = question, RepliesCount = replies.Count() }
).OrderBy(s => s.Question.awaitingUserResponse).ThenBy(s => s.Question.dateSubmitted);

编辑:生成的 SQL

exec sp_executesql N'SELECT [t2].[ID], [t2].[catID], [t2].[subject], [t2].[question], [t2].[userID], [t2].[dateSubmitted], [t2].[isUrgent], [t2].[emailMe], [t2].[awaitingSupportResponse], [t2].[awaitingUserResponse], [t2].[lastReply], [t2].[stopWatchTotalMins], [t2].[isStopWatchOn], [t2].[stopWatchStart], [t2].[priorityLevel], [t2].[value] AS [RepliesCount]
FROM (
    SELECT [t0].[ID], [t0].[catID], [t0].[subject], [t0].[question], [t0].[userID], [t0].[dateSubmitted], [t0].[isUrgent], [t0].[emailMe], [t0].[awaitingSupportResponse], [t0].[awaitingUserResponse], [t0].[lastReply], [t0].[stopWatchTotalMins], [t0].[isStopWatchOn], [t0].[stopWatchStart], [t0].[priorityLevel], (
        SELECT COUNT(*)
        FROM [dbo].[tblHelpCentreReplies] AS [t1]
        WHERE ([t0].[ID]) = [t1].[ticketID]
        ) AS [value]
    FROM [dbo].[tblHelpCentreQuestions] AS [t0]
    ) AS [t2]
WHERE (([t2].[awaitingUserResponse] = @p0) OR ([t2].[awaitingSupportResponse] = @p1)) AND ([t2].[userID] = @p2)
ORDER BY [t2].[awaitingUserResponse], [t2].[dateSubmitted]', N'@p0 int,@p1 int,@p2 int', @p0 = 1, @p1 = 1, @p2 = 81

我已经通过数据库运行代码并且它正确返回了结果，所以它一定是其他奇怪的东西，因为代码非常简单，不过没关系，谢谢大家的帮助，我学到了很多新事物都存在这个问题!

Answer 1

这是 LINQ to SQL 吗？我怀疑问题是您在分组之前订购。你可以试试这个:

var q = dc.tblHelpCentreQuestions
          .Where(question => question.userID == UserID)
          .Where(question => question.awaitingUserResponse
                          || question.awaitingSupportResponse)
          .GroupJoin(dc.tblHelpCentreReplies,
                     question => question.ID,
                     replies => replies.ticketID,
                     (question, replies) => new { Question = question,
                                                RepliesCount = replies.Count() })
          .OrderBy(s => s.Question.awaitingUserResponse)
          .ThenBy(s => s.Question.dateSubmitted);

编辑:好的，如果这不起作用，那么可能是 SQL 分组的限制……尽管这看起来很奇怪。

不过，您始终可以强制在客户端执行排序:

var q = dc.tblHelpCentreQuestions
          .Where(question => question.userID == UserID)
          .Where(question => question.awaitingUserResponse
                          || question.awaitingSupportResponse)
          .GroupJoin(dc.tblHelpCentreReplies,
                     question => question.ID,
                     replies => replies.ticketID,
                     (question, replies) => new { Question = question,
                                                RepliesCount = replies.Count() })
          // Force the rest of the query to execute in .NET code (Enumerable.XXX)
          .AsEnumerable()
          .OrderBy(s => s.Question.awaitingUserResponse)
          .ThenBy(s => s.Question.dateSubmitted);