DAT200Microsoft® ADO.NET for ADO Classic Developers: Introducing ADO.NET

Jackie GoldsteinRenaissance Computer Systemsjackie@renaissance.co.il

Jackie Goldstein…General Manager of Renaissance Computer Systems

Consulting, Training, & Development, with Microsoft Tools & TechnologiesAuthor of “Database Access with Visual Basic.Net”

(ISBN 0-67232-3435, Addison-Wesley)MSDN Regional Director for IsraelFounder 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 2000 and DevDays 2001 with Microsoft team in Redmond

Session Topics

ADO.NET ArchitectureADO.NET Object ModelADO.NET and XMLSummary and Questions

Session Topics

ADO.NET ArchitectureADO.NET Object ModelADO.NET and XMLSummary and Questions

ADO.NET

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

The .NET 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

.NET Data Provider.NET Data Provider

DataReaderDataReader

CommandCommandConnectionConnection

SyncSync

Data In The .NET PlatformControls,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. ADOSeparation between connected data access model and disconnected programming modelNo CursorType, CursorLocation, or LockTypeADO Recordset functionality is split into smaller, specific objects, e.g. DataReader, DataTable, CommandADO.NET allows manipulation of XML data, not just XML as I/O format

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

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 Topics

ADO.NET ArchitectureADO.NET Object ModelADO.NET and XMLSummary and Questions

.NET Data ProvidersManage interaction to a data sourceMicrosoft Implementations

OLEDB .NET Data ProviderSQLServer .NET Data ProviderODBC .NET Data Provider Oracle .NET Data Provider

Main Objects:Connection, Command, ParameterDataReader, DataAdapter

Data Data StoreStore

DataDataProviderProvider

Using .NET Data Providers•Connection Object•Command Object•DataReader Object

demodemo

DataSet Object

DataSetDataSet

DataTableDataTable

DataTableDataTable

DataRowDataRow

DataColumnDataColumn

RelationsRelations

ConstraintsConstraintsXML SchemaXML Schema

DataAdapter Object

DataAdapterDataAdapter

SelectCommandSelectCommand

InsertCommandInsertCommand

UpdateCommandUpdateCommand

DeleteCommandDeleteCommand

TableMappingsTableMappings

DatabaseDatabase

DataSetDataSet

Using the DataAdapter•Simple Fill•Database Updates•Using the DataAdapter Configuration Wizard

demodemo

Strongly Typed DataSetDeal with DataSets, Tables, and Rows as Objects

Columns and Relations as propertiesClass Generated At Design Time

Inherits from DataSetSchema coded into the class

BenefitsCompile time type checking Statement completionConcise, readable code

Session Topics

ADO.NET ArchitectureADO.NET Object ModelADO.NET and XMLSummary and Questions

.NET Data Provider.NET Data Provider

DataReaderDataReader

CommandCommandConnectionConnection

SyncSync

Unified ArchitectureControls,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)

The DataSetLoads/saves XML data into/out of DataSetSchema can be loaded/saved as XSDSchema can be inferred from XML Data

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

XmlDataDocument unifies XML and DataSimultaneously exposes data relationally or as XMLExposes a relational view over structured XML

Plugs into entire stack of XML servicesSubclass of XmlDocument – it’s a DOMRetains fidelity of underlying document

Plugs into entire stack of Data servicesCan obtain a DataSet view of an XmlDataDocRelational and XML views stay in sync

Scenarios EnabledSimultaneously expose data relationally or as XML

Good for semi-structured dataMultiple tools on same data

Map interesting subset relationally using schema

Use natural object model for each subset

Both DOM and DataSet can “grow up”

Accessing XML Data•XML Navigation and Selection•XML Format in ADO.NET vs. ADO 2.X•Synchronization of Relational and XML Views of data

demodemo

Session Topics

ADO.NET ArchitectureADO.NET Object ModelADO.NET and XMLSummary and Questions

Session SummaryA natural evolution of ADODesigned with extensive XML supportClosely integrated with the .NET FrameworkProvides fast and efficient mechanisms for connected data access and disconnected data manipulationTry it – You’ll Like it !!!

Community Resources

Community Resourceshttp://www.microsoft.com/communities/default.mspx

Most Valuable Professional (MVP)http://www.mvp.support.microsoft.com/

NewsgroupsConverse online with Microsoft Newsgroups, including Worldwidehttp://www.microsoft.com/communities/newsgroups/default.mspx

User GroupsMeet and learn with your peershttp://www.microsoft.com/communities/usergroups/default.mspx

Suggested Reading And Resources

The tools you need to put technology to work!The tools you need to put technology to work!

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© 2003 Microsoft Corporation. All rights reserved.© 2003 Microsoft Corporation. All rights reserved.This presentation is for informational purposes only. MICROSOFT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, IN THIS SUMMARY.This presentation is for informational purposes only. MICROSOFT MAKES NO WARRANTIES, EXPRESS OR IMPLIED, IN THIS SUMMARY.