linq e ef
DESCRIPTION
Slide dell'evento di Perugia su LINQ e ADO.NET Entity FrameworkTRANSCRIPT
Pietro BrambatiMicrosoftblogs.msdn.com/pietrobr
{ { LINQ LINQ && ADO.NET Entity ADO.NET Entity FrameworkFramework}}
C# 3.0C# 3.0C# 3.0C# 3.0 VB 9VB 9VB 9VB 9
.NET Language Integrated Query.NET Language Integrated Query
LINQ LINQ toto
ObjeObjectscts
LINQ LINQ toto
ObjeObjectscts
LINQ LINQ toto
DataDataSetsSets
LINQ LINQ toto
DataDataSetsSets
LINQ LINQ toto
SQLSQL
LINQ LINQ toto
SQLSQL
LINQ LINQ toto
XMLXML
LINQ LINQ toto
XMLXML
oggettioggetti
<book> <title/> <author/> <year/> <price/></book>
XMXMLL
Mondo Mondo relazionarelaziona
lele
ApplicazionApplicazionee
LINQ to SQLLINQ to SQL
from c in db.Customerswhere c.City == "London"select c.CompanyName
EnumeratEnumeratee
SELECT CompanyNameFROM CustomerWHERE City = 'London'
SQL QuerySQL Queryo 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 …
DML DML o SProcso SProcs
• Dati == Oggetti
• Imperativo Dichiarativo
• Per oggetti, XML e Dati relazionali
• 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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Pietro BrambatiMicrosoftblogs.msdn.com/pietrobr