Moving from Microsoft ® ADO 2.X To ADO.NET Jackie Goldstein Renaissance Computer Systems Ltd. MSDN Regional Director, Israel [email protected] Prerequisites

Moving from MicrosoftMoving from Microsoft®® ADO 2.X To ADO 2.X To ADO.NETADO.NET

Jackie GoldsteinJackie Goldstein

Renaissance Computer Systems Ltd.

MSDN Regional Director, Israel

[email protected]

Prerequisites for presentation:

I assume you know: 1) Visual Basic.NET

2) ADO 2.X

Level: Intermediate

##

Jackie Goldstein…Jackie Goldstein… General Manager of Renaissance Computer Systems

– Consulting, Training, & Development, with Microsoft Tools & Technologies

Author of “Database Access with Visual Basic.Net”

(ISBN 0-67232-3435, Addison-Wesley) MSDN Regional Director for Israel Founder and monthly host of

IVBUG (Israel Visual Basic User Group) Speaker at local & international developer

conferences:– Microsoft Developer Days, TechEd,

– VSLive!, VBITS, VB DevCon, SQL2TheMax

Selected as SME (Subject Matter Expert) to help develop/review content for DevDays with Microsoft team in Redmond

Session TopicsSession Topics

ADO.NET Architecture ADO.NET Object Model ADO.NET and XML Summary and Questions



ADO.NETADO.NET

ADO Look and Feel… Direct OLE DB connectivity… Integrated with .NET Framework… Integrated with XML… "Designed for the Enterprise"…

The .NET FrameworkThe .NET FrameworkApplications Are Built Using the FrameworkApplications Are Built Using the Framework

Common Language Runtime

Memory Mgmt Type System Lifetime

System Base Classes

IO Threading Security ServiceProcess

Data Oledb SQLClient XML

System.Web

Web Services Web Forms

ASP Application Services

System.Windows.Forms

Controls Drawing

Windows Application Services

ADO.NET Object ModelADO.NET Object Model

Classic ADO styling…–Connection–Command, Parameter

…but a lot more functionality & flexibility–DataReader

Forward-only, Read-only "RecordSet"

–DataTable and DataSet

Disconnected, In-Memory Cache–DataAdapter

Connects a DataSet with a data source

.NET Data Provider.NET Data Provider

DataReaderDataReader

CommandCommandConnectionConnection

SyncSync

Data In The .NET PlatformData In The .NET Platform

Controls,Controls,Designers,Designers,

Code-gen, etcCode-gen, etc

DataSetDataSet

XmlReaderXmlReader

XmlText-XmlText-ReaderReader

XmlNode-XmlNode-ReaderReader

XSL/T, X-Path,XSL/T, X-Path,Validation, etcValidation, etc

XmlData-XmlData-DocumentDocument

Data-Data-AdapterAdapter

Points to Note in ADO.NET vs. ADOPoints to Note in ADO.NET vs. ADO

Separation between connected data access model and disconnected programming model

No CursorType, CursorLocation, or LockType ADO Recordset functionality is split into

smaller, specific objects, e.g. DataReader, DataTable, Command

ADO.NET allows manipulation of XML data, not just XML as I/O format



.NET Data Providers.NET Data Providers

Manage interaction to a data source Microsoft Implementations

–OLEDB .NET Data Provider

–SQLServer .NET Data Provider

–ODBC .NET Data Provider

–Oracle .NET Data Provider

–Exchange .NET Data Provider Main Objects:

–Connection, Command, Parameter

–DataReader, DataAdapter

Data Data StoreStore

DataDataProviderProvider

Demo – Demo – Using .NET Data ProvidersUsing .NET Data Providers

Connection Object Command Object DataReader Object

DataSet Object DataSet Object

DataSetDataSet

DataTableDataTable

DataTableDataTable

DataRowDataRow

DataColumnDataColumn

RelationsRelations

ConstraintsConstraintsXML SchemaXML Schema

DataAdapter ObjectDataAdapter Object

DataAdapterDataAdapter

SelectCommandSelectCommand

InsertCommandInsertCommand

UpdateCommandUpdateCommand

DeleteCommandDeleteCommand

TableMappingsTableMappings

DatabaseDatabase

DataSetDataSet

Demo – Demo – Using the DataAdapterUsing the DataAdapter

Simple Fill Database Updates Using the DataAdapter Configuration

Wizard

Strongly Typed DataSetStrongly Typed DataSet

Deal with DataSets, Tables, and Rows as Objects–Columns and Relations as properties

Class Generated At Design Time– Inherits from DataSet

–Schema coded into the class Benefits

–Statement completion

–Compile time type checking

–Concise, readable code



.NET Data Provider.NET Data Provider

DataReaderDataReader

CommandCommandConnectionConnection

SyncSync

Unified ArchitectureUnified Architecture

Controls,Controls,Designers,Designers,

Code-gen, etcCode-gen, etc

DataSetDataSet

XmlReaderXmlReader

XmlText-XmlText-ReaderReader

XmlNode-XmlNode-ReaderReader

XSL/T, X-Path,XSL/T, X-Path,Validation, etcValidation, etc

XmlData-XmlData-DocumentDocument

Data-Data-AdapterAdapter

ADO.NET And XML (1)ADO.NET And XML (1)

The DataSet– Loads/saves XML data into/out of DataSet

– Schema can be loaded/saved as XSD

– Schema can be inferred from XML Data

ADO.NET And XML (2) ADO.NET And XML (2) Data is XML is DataData is XML is Data

XmlDataDocument unifies XML and Data– Simultaneously exposes data relationally or as XML

– Exposes a relational view over structured XML

Plugs into entire stack of XML services– Subclass of XmlDocument – it’s a DOM

– Retains fidelity of underlying document

Plugs into entire stack of Data services– Can obtain a DataSet view of an XmlDataDoc

– Relational and XML views stay in sync

Scenarios EnabledScenarios Enabled

Simultaneously expose data relationally or as XML–Good for semi-structured data

–Multiple tools on same data Map interesting subset relationally using

schema–Use natural object model for each subset

Both DOM and DataSet can “grow up”

Demo – Demo – Accessing XML DataAccessing XML Data

XML Navigation and Selection XML Format in ADO.NET vs. ADO

2.X Synchronization of Relational and

XML Views of data



Comparison Between ADO and Comparison Between ADO and ADO.NET (1)ADO.NET (1)

FeatureADOADO.NET

Memory-resident Data Representation

RecordSet can contain one table

DataSet can contain one or more tables represented by DataTable Object

Relationship Between Multiple Tables

Require the JOIN querySupports the DataRelation object

Data VisitationScans RecordSet rows sequentially

Uses a navigation paradigm for non-sequential access

Disconnected AccessProvided by RecordSet but typically supports connected access

Communicates with standardized calls to the DataAdapter

Comparison Between ADO and Comparison Between ADO and ADO.NET (2)ADO.NET (2)

FeatureADOADO.NET

ProgrammabilityUses Connection object to transmit commands

Uses strongly typed programming characteristics of XML

Sharing Disconnected Data Between Tiers or Components

Uses COM marshalling to transmit disconnected record set

Transmits a DataSet with an XML file

Transmitting Data Through Firewalls

Problematic because firewall are typically configured to prevent system-level requests

Supported, DataSet object use XML, which can pass through firewalls

ScalabilityDatabase locks and active database connections for long durations

Disconnected access to database data without retaining database locks

Session SummarySession Summary

A natural evolution of ADO Designed with extensive XML support Closely integrated with the .NET

Framework Provides fast and efficient mechanisms for

connected data access and disconnected data manipulation

Try it – You’ll Like it !!!

Questions?Questions?

Moving from MicrosoftMoving from Microsoft®® ADO 2.X To ADO 2.X To ADO.NETADO.NET

Jackie GoldsteinJackie Goldstein

Renaissance Computer Systems Ltd.MSDN Regional Director, [email protected]

Prerequisites for presentation: I assume you know: 1) Visual Basic.NET2) ADO 2.X

Level: Intermediate

##

Documents

Moving from Microsoft ® ADO 2.X To ADO.NET Jackie Goldstein Renaissance Computer Systems Ltd. MSDN Regional Director, Israel [email protected] Prerequisites