Introduction to Database Development Using

Borland Data Providers

2128

Martin Rudy

Agenda

– BDP Architecture Overview– BDP Components– Connection to data– Using the Data Explorer– Updating data / Transactions– Master / Detail– Dynamic Queries– Migrating to BDP– Data resolving

Additional BDP Sessions

Mon

2186 Building Database Applications with ADO.NET

3188 ASP.NET Web Forms and Databases

Tue

2106 The ADO.NET DataSet In-depth

Wed

4100 Integrating into the Borland Data Provider

3188 ASP.NET Web Forms and Databases

3116 Top 10 Techniques for Microsoft .NET DB Dev

BDP Architecture Overview

– Implementation for ADO.NET Data Provider interfaces

– Includes set of component designers– Live data– Adds following extensions:

• metadata retrival• schema creation

Supported Databases

– ORACLE 9.1.2, 8.1.5– Microsoft SQL Server 2000– MSDE– Access – InterBase 7.x– Sybase 12.5

BDP Components

DataSet

New in Diamondback

– BdpCopyTable• Copy table data and PK

– Data Resolving• DataHub• DataSync

– Data Remoting• RemoteConnection• RemoteServer

Connecting to data

– Place a BdpConnection component– Set connection parameters– Place a BdpDataAdapter and define

SQL statements– Create a dataset– Activate BdpDataAdapter– Place a data aware control and

connection to dataset

Code DemoConnecting to data

Using the Data Explorer

– Tool to browse databases

– Establish named connections

– Display table schemas, stored procs, views

– Modify data – update and rollback option

– Alter, drop, copy, paste table

– SQL Window

– Data migration

– Available outside IDE

Code DemoUsing the Data Explorer

Data updating basics

– Two BdpDataAdapter methods:• Update• AutoUpdate

– BdpCommandBuilder• Developer handled updates

Code DemoData updating basics

Column Properties

– Properties for each column– Like TField properties– Use Tables property on DataSet– Displays Table Collections Editor– Select Columns property– Display Columns Collections Editor

Code DemoColumn Properties

Transactions

– BdpTransaction• Commit• Rollback

– Create instance of BdpTransaction– BeginTransaction from connection

Code DemoTransactions

Master / Detail

– Need two BdpDataAdapter components– Create SQL for master and detail– Populate same dataset– Activate both adapters– Modify dataset Relations property

• Use Relations Collection Editor• Define Parent and Child tables

– Detail DataMember property use relationship name

Code DemoMaster / Detail

Dynamic Queries

– Specify SQL in BdpDataAdapter– Use ? for parameter place holder– Modify BdpDataDataAdaper

SelectCommand property– Use Parameters property to display

BdpParameter CollectionEditor to define parameters

– Assign parameter value as follows:BdpSelectCommand1.Parameters['cntry'].Value

Code DemoDynamic Queries

Migrating to BDPComponents

Connection BdpConnection

DataSetProvider (DSP) BdpDataAdapterBdpDataHub/BdpDataSync

ClientDataSet (CDS) DataSet

TransDesc, IBTransaction BdpTransaction

Migrating to BDPEvents

DSP.BeforeUpdateRecordDSP.AfterUpdateRecord

BdpDataAdapter.RowUpdatingBdpDataAdapter.RowUpdated

DataSet.BeforePostDataSet.AfterPost

DataSet.Tables RowChangingDataSet.Tables RowChanged

DataSet.BeforeDeleteDataSet.AfterDelete

DataSet.Tables RowDeletingDataSet.Tables RowDeleted

TField.OnValidate DataSet.Tables ColumnChangingDataSet.Tables ColumnChanged

Migrating to BDPMethods

CDS.ApplyUpdates BdpDataAdapter.AutoUpdate

CDS.Delta DataSet/Tables GetChanges

CDS.CancelUpdates DataSet/Tables RejectChanges

CDS.ChangeCount > 0 DataSet.HasChanges

CDS.CloneCursor DataSet/Tables Clone

CDS.EmptyDataSet DataSet/Tables Clear

CDS.LoadFromFile(xml) DataSet.ReadXml

CDS.WriteToFile(xml) DataSet.WriteXml

CDS.MergeChangeLog DataSet/Tables AcceptChanges

Migration to BDPProperties

DSP.UpdateMode BdpUpdateMode (All, Key, Changed)

DataSet.State DataSet.Tables Rows RowState

EOF/BOF None – need to use DataRow

TField properties DataSet ColumnCollection

Code DemoMigrating to BDP

Data Resolving

– DataHub• Client side cache for DataSet • From any IDataProvider

– DataSync• holds a collection of DataProviders• BDP and non-BDP• Optimal SQL generation for BDP • Uses CommandBuilder for non BDP providers

– Similar to TDataSetProvider• Error dataset not returned• Integrated into dataset

Introduction to Database Development Using

Borland Data Providers

Martin Rudy

2128

Q & A