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Entity Framework 4.1

:Entity Framework 4.1

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:978-964-2989-76-8:78000

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:1416www.pendarepars.com

:66572335- :66926578 :09122452348 [email protected]

1 ENTITY FRAMEWORK........................................................3

Entity Framework...................................................................................4

!.....................................................................6

Entity Framework..............................................................................8

...................................................................................................9

.......................................................................................9

..............................................................................................10

...............................................................................................13

Entity Framework 4.0.......................................................................15

POCO.........................................................................................16

Model First.........................................................................16

Deffered Loading.......................................................................16

LINQ to Entities...............................................16

......................................................................17

Complex................................................................................17

.NET.................................................................17

Model Browser.......................................................18

..............................................................................18

2 ENTITY DATA MODEL.....................................................................21

EDM..................................................................................................21

Database First.........................................................................................22

.......................................................26

Model First.............................................................................................28

..................................................................................................34

.........................................................................................38

Code Only..............................................................................................39

3 ENTITY DATA MODEL................................................43

EDM Designer................................................................................................43

Designer..........................................................................................43

Model Browser................................................................................45

Mapping Details..............................................................................46

........................................................................................................47

Scalar Properties.........................................................................................48

TypeComplex............................................................................................49

Complex..................................................................................49

Complex...............................................................................49

)Foreign Keys ()Associations(...............................54

Navigation Properties.................................................................................55

Mapping Details..................................................................................56

EDM...........................................................................................57

EDM......................................................................................59

SSDL.................................................................................................59

EntityType......................................................................................60

Association.....................................................................................61

CSDL.................................................................................................62

EntityType.......................................................................................63

Association.....................................................................................65

MSL...................................................................................................65

EDM.............................................................................67

4 EDM...................................................................................73

Entity Framework.............................................................................73

Syntax...........................................................................74

Query Syntax..............................................................................................74

Context........................................................................................................78

Method Syntax............................................................................................79

.............................................................................81

LINQ to Entities.........................................................................................81

Entity SQL..................................................................................................88

EntityClient.................................................................................................90

EntityConnection...........................................................................91

EntityCommand.............................................................................93

)Immediate ()Deferred (...................93

)Deferred(...................................................................................94

)Immediate(................................................................................96

5 ................................................................................99

ObjectContext.................................................................................................99

ObjectStateEntry........................................................................................100

................................................................................101

SaveChanges.....................................................105

............................................................................................108

......................................................................................111

..........................................................................113

...............................................................................................116

6 STORED PROCEDURE.................................................................119

Stored ProcedureEDM..........................................................................119

Model Browser...................................................................................125

EF................................................................................126

T-SQLEFCUD..................................................127

)SP (...........................................................................................132

.........................................................................................132

..................................................................................................134

..................................................................................................135

.............................................................................................136

)SP (......................................................................137

7 ..........................................................................141

...............................................................................................................141

.......................................................................................142

EF 3.5.......................................................................................143

EF 4.0...........................................................................................145

Windows Forms Application......................................146

.......................................................................................148

EDM Designer.....................................................................149

...................................................................150

...........................150

..............................................................152

.......................154

..................................................................................................155

8 T4....................................................................................159

T4......................................................................................159

T4Visual Studio 2008.........................................159

T4...................................................................................160

T4................................................................................................161

.........................................................................................165

:................................................................................167

:.........................................168

:SQL Server.........................170

T4EF.............................................................................................172

T4EF..........................................................178

9 MODEL FIRST........................................................................181

ModelFirst................................................................................181

......................................................................................182

Model First...........................................................184

Navigation Property........................................................186

..................................................................................................188

..................................................................................188

Complex.............................................................................195

DDL.............................................................................198

10 CODE ONLY.........................................................................205

.......................................................................................................206

.......................................................................209

................................................................................................210

.........................................................................211

..........................................................................................................214

................................................................217

DataAnnotation..........................................................218

Entity Framework Power Tools...........................................................228

11 WCF DATA SERVICES.......................233

WCF Data Service...................................................235

WCF Data Service....................................................241

WCF Data Service............................................249

............................................................................................250

.............................................................................................254

-

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Entity

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Studio 2008 Service Pack 1.NET Framework 3.5 Service Pack 1 .

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FrameworkADO.NET

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ClassProperty.

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1.

2."yes, we have rows"

/ Entity Framework 5

try

{

string connectionString = Class1.GetConnectionString();

using (SqlConnection conn = new SqlConnection(connectionString))

{

conn.Open();

using (SqlCommand cmd = new SqlCommand())

{

cmd.Connection = conn;

cmd.CommandText = "SELECT FirstName, MidName, LastName

FROM Person.Contact WHERE ContactID = @ContactID";

SqlParameter param = new SqlParameter("@ContactID",

SqlDbType.Int, 50, "ContactID");

param.Value = 8;

cmd.Parameters.Add(param);

SqlDataReader rdr = cmd.ExecuteReader();

while (rdr.Read())

{

Console.WriteLine(String.Format("{0}, {1}",

rdr[0], rdr[1]));

}

}

}

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

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ERM

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Java.NET .

ERM

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Entity Framework

ERM

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DataReaderDataSet

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ORM

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3.

Entity Framework 10

using (SqlConnection conn = new SqlConnection(@"Data

Source=(local);Initial Catalog=AdventureWorks;UID=sa;PWD=pwd"))

{

conn.Open();

using (SqlCommand cmd = new SqlCommand())

{

cmd.Connection = conn;

cmd.CommandType = CommandType.Text;

cmd.CommandText = "SELECT FirstName, MiddleName, LastName

FROM Person.Contact WHERE LastName = @LastName";

cmd.Parameters.Add(new SqlParameter("@LastName",

System.Data.SqlDbType.NVarChar)).Value = "Behrouz";

using (SqlDataReader rdr = cmd.ExecuteReader())

{

if (rdr.HasRows)

{

rdr.Read();

//

}

}

}

}

)

( ..

Entity Framework .

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Entity Data ModelEDM .EDM

Entity Framework

: .EDM

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Framework

.1 -1AdventureWorks

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Contact .Employee

.AdditionalContactInfo

.ContactID.

1-1 :

.

.

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SELECT c.FirstName, c.LastName, e.Title, e.HireDate, aci.CellPhone,

aci.EmailAddress

FROM Contact c

INNER JOIN AdditionalContactInfo aci ON c.ContactID = aci.ContactID

INNER JOIN Employee e ON c.ContactID = e.ContactID

Entity Framework 12

EDMEntity Framework

.EDM

.

Entity Framework

BLL.

EDMEntity Framework""

2-1.

2-1 :

LINQ:

from c in Contact.TypeOf<Employee> select c;

Entity Framework

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Data ModelEDM.


Entity Framework

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PropertyProperty .

PropertyPhoneint.

PropertyEntityPropertyEntity .

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Property)Method (

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(Primary Key)

.

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:

Entity Framework 14

PropertyComplex.Property

Complex.

.

.

.

EDM .

.2-1 .

Entity Framework

.

EDM

Designer.

3-1 :

LINQ

.3 -1

Entity Framework .EDMDesigner

.3 -1


Navigation Property .

EmployeeContact .

EmployeeContactNavigation PropertyContact

Employee

Employee .Navigation Property

.


Entity

Framework 4.0 .Entity

Framework3.5.

POCO)Plain Old CLR Objects(

Model First

Navigation PropertyDeffered Loading

LINQ to Entities .

.Category

Categories

Complex

.NETEntity Framework

Model Browser

.

.

Entity Framework 16

POCO

.Entity Framework

.POCO.

Model First

EDM Designer

.

Deffered Loading

Deffered LoadingLazy Loading

Navigation Property

.

Contact

Contact

Connection

. .

LINQ to Entities

Entity Framework .

Stored ProcedureUser Defined Function.

SqlFunctionsEntityFunctionsEntity Framework 4.0

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.5.

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Entity Framework-

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Navigation Property


.

Complex

ComplexEntity Framework 4.0 .

ComplexProperty

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.Entity Framework 4.0

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Entity Framework 18

Model Browser

Model Browser

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Property

.2.

Entity Framework

.

Entity FrameworkProvider .Provider

.

1.EntityClientEntity Framework

EDM .Provider

SqlClientProviderSQL Server

SQL Server.

2.SQL Provider.NETSQL Server

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Entity FrameworkADO.NET Data Provider

.Provider

ADO.NET Data Provider .

Provider

Entity Framework:

Oracle

MySql


PostgreSQL

SQL Anywhere

DB2

Informix

U2

Ingres

Progress

Firebird

Synergy

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Entity Framwork.

:

http://msdn.microsoft.com/en-us/data/dd363565.aspx

Provider .Connection StringProvider

Provider .SQL

LINQ to EntitiesEntity SQLCRUD

SQL

Provider . .

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CRUDCreateRetrieveUpdateDelete

( ).

SQL Server 2008SqlClientProvider

.ProviderSQL Server)200020052008 (

.SQL Server Compact Edition.

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