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Introduzione a ADO.NET

Silvano CorianiDeveloper & Platform Evangelism

MCTrainerMCSDeveloperMCADeveloperMCSEInternetMCDBA

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Da dove iniziare...

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.NET Data Access Overview

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.NET Data Access Overview

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.NET Data Access Overview

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Da ADO 2.x a ADO.NET

ConnectionConnection

AD

OA

DO

.NET

CommandCommand

RecordsetRecordset

XxxConnectionXxxConnection

XxxCommandXxxCommand

DataSetDataSet

XxxTransactionXxxTransaction

XxxDataReaderXxxDataReader

XxxDataAdapterXxxDataAdapter

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Architettura applicativa

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.NET Data Provider

• connessaCommand

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.NET Data Provider

• DataAdapter• DataReader

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.NET Application.NET Application

ODBCODBC

OLE DBOLE DB

Other DBMSOther DBMSNon-relationalNon-relational

sourcessources

OLE DB ProviderOLE DB Provider

SQL ServerSQL Server

System.Data.SqlClientSystem.Data.SqlClient System.Data.OleDbSystem.Data.OleDbSystem.Data.OracleSystem.Data.Oracle

OracleOracle

DataSetDataSet

System.Data.OdbcSystem.Data.Odbc

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I componenti di ADO.NET

Data SourceData Source

.NET Data Provider.NET Data Provider

ConnectionConnection

CommandCommand

DataAdapterDataAdapter

DataReaderDataReader

.NET Data Storage.NET Data Storage

DataSetDataSet

DataTablesDataTables

XMLDataXMLData

XMLDataSchemaXMLDataSchema

XMLXML

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Data

ADO.NET in uno scenario connesso

XxxConnectionXxxConnection

XxxCommandXxxCommand

XxxDataReaderXxxDataReader

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DEMO

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Architettura Connessa vs. Disconnessa

• DataAdapterDataSet

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ADO.NET in uno scenario disconnesso

XxxConnectionXxxConnection

XxxDataAdapterXxxDataAdapter

DataSetDataSet

Data

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Architettura Connessa vs. Disconnessa

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DEMO

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DataSet: Intro

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DataSet: Intro

• Basato su un paradigma a “collezioni”– DataRow come collezione di

campi/colonne– DataTable come collezione di

DataRow– DataRelations come collezione di

relazioni tra le DataTables– Constraints

• array based

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DataSet: Intro

• schema XSDMarshalByValueObjectISerializable

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DataSet Object Model

DataSet

DataTableCollectionDataRelationsCollection

DataRelation DataTable

DataColumnCollectionDataRowCollectionConstraintCollection

DataColumnDataRowConstraint

DataTable DataTable

DataColumn DataRow

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Popolare il DataSet

• DataAdapterstruttura via codice

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DataAdapter

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Architettura del DataAdapter

Data

SqlDataAdapter

SqlConnection

SelectSqlCommand

InsertSqlCommand

UpdateSqlCommand

DeleteSqlCommand

DataSet

SqlCommandBuilder

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Architettura del DataAdapter

sp_SELECT

XxxCommandXxxCommand

SelectCommand UpdateCommand InsertCommand DeleteCommand

XxxDataAdapter

XxxCommandXxxCommand XxxCommandXxxCommand XxxCommandXxxCommand

XxxConnectionXxxConnection

sp_UPDATE sp_INSERT sp_DELETE

XxxDataReaderXxxDataReader

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Ma dobbiamo scrivere tutto a mano?

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DEMO

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In sintesi

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News

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