ADO.NET Entity Framework · Programming with Entity SQL The EntityClient provides the usual...
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ADO.NET Entity Framework Mike Taulty Developer & Platform Group Microsoft Ltd [email protected] http://www.mtaulty.com
Transcript of ADO.NET Entity Framework · Programming with Entity SQL The EntityClient provides the usual...
ADO.NET Entity Framework
Mike TaultyDeveloper & Platform GroupMicrosoft [email protected]://www.mtaulty.com
ADO.NET Entity Framework
Extension to the ADO.NET provider model
FunctionalityProgram against an abstracted model of your store schema
Use traditional ADO.NET API or ORM/LINQ
Slated to ship mid 2008Currently at Beta 3, Tooling at CTP 2
Downloadable in ASP.NET 3.5 Extensions Preview
Quick Demo to Defer Boredom
.NET Entity Provider (Entity SQL)
Command
ConnectionReader
V3.0
Entity Framework Architecture
Store
.NET Data Provider
V2.0
Command
ConnectionReader
Adapter
V3.0
Conceptual Model
Entity Entityrelationship
Mapping (MSL)
V3.0Programming Model
Object Relational Mapping
LINQ
Tools, SSDL, MSL, CSDL
Programming with Entity SQL
The EntityClient provides the usual
Connection, Command, DataReader
There is no EntityDataAdapter
V1.0 the model is read-only
Entity SQL has some additional constructs to expose the underlying conceptual model – e.g.;
ANYELEMENT CREATEREF DEREF IS OF KEY MULTISET NAVIGATE OFTYPE
OVERLAPS REF ROW SELECT SET TREAT USING
Programming with Entity Client
Mapping Examples ( 1 – Splitting )
Store
Good Customers
ID
FirstName
LastName
Bad Customers
ID
ForeName
Surname
Customers
CustomerId
First
Last
Type
EntitiesMapping
Type=“G”
Type=“B”
Mapping Examples ( 2 – TPH )
Store
Customer
CustomerId
First
Last
EntitiesMapping
Customers
ID
FirstName
LastName
IsPremium
Overdraft
AccountManagerPremiumCustomer
Overdraft
AccountManager
?
* Framework also supports TPT
Mapping Examples ( 3 – View + SPs )
Store
UkCustomer
CustomerId
Name
EntitiesMapping
ClientView1
select c.id, c.name
from customers c
where c.country = ‘UK’
p_DeleteUkCustomer
p_UpdateUkCustomer
p_InsertUkCustomer
Querying with Entity SQL
Programming with LINQ to Entities
New Data Access ORM API implemented in assembly
System.Data.Entity.dll
System.Data.Entity.Design.dll
Many NamespacesSystem.Data.Entity
System.Data.Objects
and many more...
ORM API can be used with or without LINQ
Key Classes
StateManagement
Connection
provider
Metadata
MSL SSDLCSDL
CRUD
LINQ to Entities – Possible Topics
Change Tracking
Concurrency Transactions (i)POCO
Stored
ProcsInheritance
Customising Code-Gen
Metadata
N-TierCompiled Queries
LINQ to Entities
Resources
Download ASP.NET 3.5 Extensions Preview
http://www.asp.net
ADO.NET Team Blog
http://blogs.msdn.com/adonet
Search for “entity” on
http://mtaulty.com
Updates
Go here to download the latest version of this slide-deck
http://mtaulty.com/downloads/dw08.zip
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