Put multiple row values in object in VB.NET - sql

Question

I have a stored procedure and often that procedure will return multiple rows, for example:
ID Type Price
1234 A 2.260
1234 B 2.690
1234 C 2.990
1234 D 2.690
1234 D 2.790
1234 D 2.650
1234 D 2.680
And I want to output the latest value for each type. In my data reader I have:
While dr.Read
result.price.TypeA= dr("price")
result.price.TypeB= dr("price")
result.price.TypeC= dr("price")
result.price.TypeD= dr("price")
End While
and my query looks like:
select sm_id,
type,
price
from ** WITH (NOLOCK)
where id = #id
order by id desc
I'm not sure how to store all of my results into my object so I can access them in my front end.

Answer 1

This is may be not most performant query but it will do the job as what you described it
select t1.id, t1.t, t1.maxDt, t2.price
from
(select id, [TYPE] t, MAX(ud) maxDt
from dbo.a it
where id =1
group by id, [type]) t1
left join
dbo.a t2 on t1.id = t2.id and t1.t = t2.[type] and t1.maxDt = t2.ud
Now, storing results in object and displaying it
Public Class MyClass
Public Property Id As Integer
Public Property [Type] As String
Public Property [Date] As DateTime
Public Property Price As Decimal
End Class
. . . . .
Dim myList As New List(Of MyClass)()
While dr.Read()
Dim item As New MyClass()
item.Id = dr("id")
item.[Type] = dr("t")
item.[Date] = dr("maxDt")
item.Price = dr("price")
myList.Add(item)
End While
myDataGrid.DataSource = myList
This is what you, approximately, need