This document discusses LINQ and the ADO.NET Entity Framework. It describes how LINQ provides a unified approach for accessing heterogeneous data sources like objects, XML, relational data, and more. The ADO.NET Entity Framework is the conceptual model for developing applications with LINQ to Entities, which uses LINQ to access Entity Framework data. LINQ to SQL and LINQ to Entities are designed for different scenarios when querying and updating data.

2. Pietro Brambati
Microsoft
blogs.msdn.com/pietrobr
{{ LINQLINQ &&
ADO.NET Entity FrameworkADO.NET Entity Framework}}

6. C# 3.0C# 3.0 VB 9VB 9
.NET Language Integrated Query.NET Language Integrated Query
LINQLINQ
toto
ObjeObje
ctscts
LINQLINQ
toto
DataData
SetsSets
LINQLINQ
toto
SQLSQL
LINQLINQ
toto
XMLXML
oggettioggetti
<book>
<title/>
<author/>
<year/>
<price/>
</book>
XMXM
LL
MondoMondo
relazionalrelazional
ee

8. ApplicazioneApplicazione
LINQ to SQLLINQ to SQL
from c in db.Customers
where c.City == "London"
select c.CompanyName
EnumerateEnumerate
SELECT CompanyName
FROM Customer
WHERE City = 'London'
SQL QuerySQL Query
o SProco SProc
RowsRows
OggettiOggetti
db.Customers.Add(c1);
c2.City = “Perugia";
db.Customers.Remove(c3);
SubmitChanges()SubmitChanges()
INSERT INTO Customer …
UPDATE Customer …
DELETE FROM Customer …
DMLDML
o SProcso SProcs

10. • Dati == Oggetti
• Imperativo  Dichiarativo
• Per oggetti, XML e Dati relazionali

18. • LINQ to * : un approccio unificato per
l’accesso a sorgenti dati eterogenee
• ADO.NET EF: il modello concettuale per
sviluppare…
• LINQ to Entites : LINQ per EF
• LINQ to SQL e LINQ to Entities sono
pensati per diversi scenari

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The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market
conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation.
MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
Pietro Brambati
Microsoft
blogs.msdn.com/pietrobr