I have a table like this .(VisitType is dynamic)
PersonelId VisitDate VisitTypeId
1 2015-02-24 A
2 2015-02-23 S
2 2015-02-24 D
4 2015-02-22 S
2 2015-02-22 A
2 2015-02-22 B
3 2015-02-23 A
1 2015-02-23 A
1 2015-02-24 D
4 2015-02-24 S
4 2015-02-22 S
2 2015-02-22 S
3 2015-02-24 D
I want to get a pivot of this using linq as below.
VisitDate PersonelId A S D B
2015-02-22 4 0 2 0 0
2015-02-22 2 1 1 0 0
2015-02-23 2 0 1 0 0
2015-02-23 3 1 0 0 0
2015-02-23 1 1 0 0 0
2015-02-24 1 1 0 1 0
2015-02-24 2 0 0 1 0
2015-02-24 4 0 1 0 0
2015-02-24 3 0 0 1 0
I use this linq
var d = (from f in _db.Visits
group f by new {f.VisitDate, f.PersonnelId }
into myGroup
where myGroup.Count() > 0
select new
{
myGroup.Key.VisitDate,
myGroup.Key.PersonnelId,
subject = myGroup.GroupBy(f => f.VisitTypeId).Select
(m => new { Sub = m.Count(), Score = m.Sum(c => c.Amount) })
}).ToList();
It is grouped by date and personel id, but don't count items from every VisitType.
Try this:
//static headers version
var qry = Visits.GroupBy(v=>new{v.VisitDate, v.PersonelId})
.Select(g=>new{
VisitDate = g.Key.VisitDate,
PersonelId = g.Key.PersonelId,
A = g.Where(d=>d.VisitTypeId=="A").Count(),
B = g.Where(d=>d.VisitTypeId=="B").Count(),
D = g.Where(d=>d.VisitTypeId=="D").Count(),
S = g.Where(d=>d.VisitTypeId=="S").Count()
});
//dynamic headers version
var qry = Visits.GroupBy(v=>new{v.VisitDate, v.PersonelId})
.Select(g=>new{
VisitDate = g.Key.VisitDate,
PersonelId = g.Key.PersonelId,
subject = g.GroupBy(f => f.VisitTypeId)
.Select(m => new { Sub = m.Key, Score = m.Count()})
});
first fetch your dynamic Visit Type for person like following
var VisTyp= (from VT in _db.VisitType select new{VisType=VT.VisitType} ).ToList();
then use following.
var d = (from f in _db.Visits
group f by new {f.VisitDate, f.PersonnelId } into myGroup
where myGroup.Count() > 0
select new
{
VisitDate = myGroup.Key.VisitDate,
PersonnelId = myGroup.Key.PersonnelId,
subject=myGroup.Count(t => VisTyp.Contains(t.VisitType))
}).ToList();
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