1
T-SQL語句我嘗試轉換下面的SQL SELECT語句LINQ2SQL:與LINQ2SQL
SELECT stoptimes.stopid,
trips.tripid,
stoptimes.sequence
FROM trips
INNER JOIN stoptimes
ON stoptimes.tripid = trips.tripid
WHERE (trips.routeid = '3')
AND (trips.endplace = 'END001')
ORDER BY stoptimes.sequence DESC
它運作良好,但與LINQ2SQL,我得到這個下面的語句的異常:
var first = (from tableTrip in db.Trips
join tableStopTimes in db.StopTimes on tableTrip.TripId equals tableStopTimes.TripId
where tableTrip.RouteId == 3 && tableTrip.EndPlace == "TAEND"
select new
{
tableStopTimes.StopId,
tableStopTimes.Radius,
tableStopTimes.PlaceName,
tableStopTimes.Place,
tableStopTimes.Sequence
}).OrderByDescending(X => X.Sequence).First();
感謝
什麼是例外? – 2012-07-13 20:52:13
序列不包含任何元素 – Maxime 2012-07-13 20:52:59
,這意味着該查詢返回任何結果,並在因爲那錯誤空序列首先調用() – 2012-07-13 20:55:17