Linq Для лица нет полного не возражая

У меня есть следующий SQL-скрипт, который дает мне результаты, я после того, как, у меня возникает проблемы тиражирования полного соединения и количество отличается от деятельности подсчитывать:Linq Для лица нет полного не возражая

select ActivityCount,ActivityComplete, ImagePath, SubjectTitle from 
(select 
Count(Distinct(Act.[ActivityID])) as ActivityCount, 
Sum(Case when (([OutcomeID] = 1 or [OutcomeID] = 3) and AOU.ActivityUserID=1) Then 1 Else 0 End) As ActivityComplete, 
Sub.[SubjectImageName] as ImagePath, 
Sub.SubjectTitle as SubjectTitle 
from [dbo].[UserActivityOutcome] AOU 
full join Activity Act on Act.[ActivityID] = AOU.[ActivityID] 
left join Category Cat on Act.[CategoryID] = Cat.[CategoryID] 
left join Subject Sub on Cat.[SubjectID] = Sub.[SubjectID] 
group by Sub.SubjectTitle, Sub.[SubjectImageName] 
) as x

результаты:

</head> 
 
<body><div class="spacer"><table id="t1"><tr><td class="typeheader" colspan="4">Result Set (2 items)</td></tr><tr><th title="System.Int32">ActivityCount</th><th title="System.Int32">ActivityComplete</th><th title="System.String">ImagePath</th><th title="System.String">SubjectTitle</th></tr><tr><td class="n">25</td><td class="n">3</td><td>Subject 1.png</td><td>Subject 1</td></tr><tr><td class="n">1</td><td class="n">1</td><td>Subject 2.png</td><td>Subject 2</td></tr><tr><td title="Total=26&#xD;&#xA;Average=13" class="columntotal">26</td><td title="Total=4&#xD;&#xA;Average=2" class="columntotal">4</td><td title="Totals" class="columntotal"></td><td title="Totals" class="columntotal"></td></tr></table></div></body> 
 
</html>

мой LINQ выглядит следующим образом:

from x in (
    (from Act in Activities 
    join AOU in UserActivityOutcomes on Act.ActivityID equals AOU.ActivityID into AOU_join 
    from AOU in AOU_join.DefaultIfEmpty() 
    join ActNA in Activities on AOU.ActivityID equals ActNA.ActivityID into ActNA_join 
    from ActNA in ActNA_join.DefaultIfEmpty() 
    join Cat in Categories on AOU.Activity.CategoryID equals Cat.CategoryID into Cat_join 
    from Cat in Cat_join.DefaultIfEmpty() 
    join Sub in Subjects on Cat.SubjectID equals Sub.SubjectID into Sub_join 
    from Sub in Sub_join.DefaultIfEmpty() 
    group new {Sub, AOU, Act,ActNA} by new { 
     Sub.SubjectTitle, 
     Sub.SubjectImageName 
    } into g 
    select new { 
     ActivityCount = g.Distinct().Count(), //g.Count(), 
     ActivityComplete = g.Sum(p => (
     (p.AOU.OutcomeID == 1 || 
     p.AOU.OutcomeID == 3)&& 
     p.AOU.ActivityUserID == 23 ? 1 : 0)), 
     ImagePath = g.Key.SubjectImageName, 
     SubjectTitle = g.Key.SubjectTitle 
    })) 
select new { 
    x.ActivityCount, 
    x.ActivityComplete, 
    x.ImagePath, 
    x.SubjectTitle 
}

источник

2016-06-16 user2390419

LINQ full outer join сложно. Единственным способом, которым он мог быть смоделирован, является объединение left outer join и right antijoin. Ниже приведен пример IMO эквивалент LINQ вашего SQL-запроса:

var query = 
    // AOU full join Act 
    (from e in (from AOU in UserActivityOutcomes 
       join Act in Activities on AOU.ActivityID equals Act.ActivityID into Act_join 
       from Act in Act_join.DefaultIfEmpty() 
       select new { AOU, Act }) 
       .Concat 
       (from Act in Activities 
       join AOU in UserActivityOutcomes on Act.ActivityID equals AOU.ActivityID into AOU_join 
       from AOU in AOU_join.DefaultIfEmpty() 
       where AOU == null 
       select new { AOU, Act }) 
    let AOU = e.AOU 
    let Act = e.Act 
    // left join Cat 
    join Cat in Categories on Act.CategoryID equals Cat.CategoryID into Cat_join 
    from Cat in Cat_join.DefaultIfEmpty() 
    // left join Sub 
    join Sub in Subjects on Cat.SubjectID equals Sub.SubjectID into Sub_join 
    from Sub in Sub_join.DefaultIfEmpty() 

    group new { Sub, AOU, Act } by new { Sub.SubjectTitle, Sub.SubjectImageName } into g 
    select new 
    { 
     ActivityCount = g.Where(e => e.Act != null).Select(e => e.Act.ActivityID).Distinct().Count(), 
     ActivityComplete = g.Sum(e => (e.AOU.OutcomeID == 1 || e.AOU.OutcomeID == 3) && e.AOU.ActivityUserID == 1 ? 1 : 0), 
     ImagePath = g.Key.SubjectImageName, 
     SubjectTitle = g.Key.SubjectTitle 
    };

источник

2016-06-16 17:37:55

Linq Для лица нет полного не возражая

ответ

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