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Jumpstart in linq
Message
From
19/09/2011 23:52:12
 
General information
Forum:
ASP.NET
Category:
LINQ
Environment versions
Environment:
VB 8.0
OS:
Vista
Network:
Windows XP
Database:
MS SQL Server
Application:
Desktop
Miscellaneous
Thread ID:
01523960
Message ID:
01523989
Views:
56
I didn't say LINQ was dead. I said LINQ to SQL is dead. Microsoft is putting it's efforts behind Entity Framework for database access. LINQ to Objects and LINQ to XML are alive and well.

>Somebody here told me to use Linq rather the traditonial scanning through the traditional ado.net recordset to aggregate information from a database extraction.
>
>Now I'm puzzled. And I'm working in vb.net btw.
>
>This seems to work for me btw (osql.execute extracts an access query in a datatable osql.dt).
>
>
> 
>        Dim osql As New sqlClass : osql.Execute("qryBestelKK")
>        Dim orders As IEnumerable(Of DataRow) = osql.dt.AsEnumerable
>
>        Dim test = From r In orders _
>                   Group r By name = r.Field(Of String)("KL_Naam") _
>                   Into g = Group Select New With {.Name = name, .total = g.Sum(Function(r) r.Field(Of Decimal)("Bestd_Waarde"))}
>
>        For Each r In test
>            Console.WriteLine("name: {0} total {1}", r.Name, r.total)
>        Next
>
>
>Can't begin to imagine why you would say Linq is dead. It is sooooo straightforward :)
>
>BTW this is just one of the manipulation I do on that table, but the others are scalars, and they were easier to figure out.
>
>Thanks for caring.
>
>>
>>
>>>Could somebody translate
>>>
>>>
>>>select Kl_Nummer,ArtBtw,sum(bestd_waarde) as netto from [somtable] group by kl_nummer,ArtBtw
>>>
>>>
>>>into linq?
>>>
>>>Thanks. Just need to see it done once, or refer me to a link (no pun intended)
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer
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