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, –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 Demo Connecting 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 Demo Using the Data Explorer

Data updating basics –Two BdpDataAdapter methods: Update AutoUpdate –BdpCommandBuilder Developer handled updates

Code Demo Data 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 Demo Column Properties

Transactions –BdpTransaction Commit Rollback –Create instance of BdpTransaction –BeginTransaction from connection

Code Demo Transactions

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 Demo Master / 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 Demo Dynamic Queries

Migrating to BDP Components ConnectionBdpConnection DataSetProvider (DSP)BdpDataAdapter BdpDataHub/BdpDataSync ClientDataSet (CDS)DataSet TransDesc, IBTransactionBdpTransaction

Migrating to BDP Events DSP.BeforeUpdateRecord DSP.AfterUpdateRecord BdpDataAdapter.RowUpdating BdpDataAdapter.RowUpdated DataSet.BeforePost DataSet.AfterPost DataSet.Tables RowChanging DataSet.Tables RowChanged DataSet.BeforeDelete DataSet.AfterDelete DataSet.Tables RowDeleting DataSet.Tables RowDeleted TField.OnValidateDataSet.Tables ColumnChanging DataSet.Tables ColumnChanged

Migrating to BDP Methods CDS.ApplyUpdatesBdpDataAdapter.AutoUpdate CDS.DeltaDataSet/Tables GetChanges CDS.CancelUpdatesDataSet/Tables RejectChanges CDS.ChangeCount > 0DataSet.HasChanges CDS.CloneCursorDataSet/Tables Clone CDS.EmptyDataSetDataSet/Tables Clear CDS.LoadFromFile(xml)DataSet.ReadXml CDS.WriteToFile(xml)DataSet.WriteXml CDS.MergeChangeLogDataSet/Tables AcceptChanges

Migration to BDP Properties DSP.UpdateModeBdpUpdateMode (All, Key, Changed) DataSet.StateDataSet.Tables Rows RowState EOF/BOFNone – need to use DataRow TField propertiesDataSet ColumnCollection

Code Demo Migrating 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