Expert VB 2005 Business Objects

696 Pages·2006·10.199 MB·English

by  Rockford Lhotka

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Expert VB 2005
Business Objects
Second Edition
Rockford Lhotka
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Expert VB 2005 Business Objects,Second Edition
Copyright © 2006 by Rockford Lhotka
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
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ISBN-13 (pbk): 978-1-59059-631-9
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In memory of my Grandmother,Evylyn,
atrue angel on earth,who now rests in heaven.
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Contents at a Glance
About the Author ......................................................................xv
About the Technical Reviewer ...........................................................xvi
Acknowledgments ....................................................................xvii
Introduction ..........................................................................xix
nCHAPTER 1 Distributed Architecture.............................................1
nCHAPTER 2 Framework Design.................................................35
nCHAPTER 3 Business Framework Implementation...............................93
nCHAPTER 4 Data Access and Security .........................................163
nCHAPTER 5 Completing the Framework........................................239
nCHAPTER 6 Object-Oriented Application Design ................................325
nCHAPTER 7 Using the CSLA .NET Base Classes.................................365
nCHAPTER 8 Business Object Implementation...................................407
nCHAPTER 9 Windows Forms UI................................................465
nCHAPTER 10 Web Forms UI ....................................................515
nCHAPTER 11 Web Services Interface............................................567
nCHAPTER 12 Implementing Remote Data Portal Hosts............................607
nINDEX ...........................................................................627
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Contents
About the Author ......................................................................xv
About the Technical Reviewer ...........................................................xvi
Acknowledgments ....................................................................xvii
Introduction ..........................................................................xix
nCHAPTER 1 Distributed Architecture........................................1
Logical and Physical Architecture .......................................1
Complexity .....................................................3
Relationship Between Logical and Physical Models ...................4
A5-Layer Logical Architecture.....................................8
Applying the Logical Architecture .................................13
The Way Ahead ................................................18
Managing Business Logic.............................................18
Potential Business Logic Locations................................18
Business Objects...............................................22
Mobile Objects.................................................25
Architectures and Frameworks.........................................33
Conclusion .........................................................33
nCHAPTER 2 Framework Design.............................................35
Basic Design Goals ..................................................36
N-Level Undo Capability.........................................37
Tracking Broken Business Rules..................................40
Tracking Whether the Object Has Changed .........................41
Strongly Typed Collections of Child Objects.........................41
Simple and Abstract Model for the UI Developer.....................43
Supporting Data Binding.........................................47
Object Persistence and Object-Relational Mapping...................50
Custom Authentication ..........................................57
Integrated Authorization .........................................58
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Framework Design...................................................58
Business Object Creation ........................................59
N-Level Undo Functionality.......................................64
Data Binding Support ...........................................67
Validation Rules................................................68
Data Portal ....................................................71
Custom Authentication ..........................................84
Integrated Authorization .........................................85
Helper Types and Classes........................................86
Namespace Organization .............................................89
Conclusion .........................................................91
nCHAPTER 3 Business Framework Implementation........................93
Setting Up the CSLA .NET Project.......................................94
Creating the Directory Structure...................................95
Supporting Localization..........................................95
Csla.Core Namespace................................................96
IBusinessObject Interface........................................97
IUndoableObject Interface........................................97
IEditableCollection Interface......................................98
IReadOnlyObject Interface........................................99
IReadOnlyCollection Interface.....................................99
ICommandObject Interface.......................................99
ObjectCloner Class..............................................99
BindableBase Class............................................100
NotUndoableAttribute Class .....................................104
UndoableBase Class ...........................................104
BusinessBase Class............................................112
ReadOnlyBindingList Class......................................130
Csla.Validation Namespace...........................................131
RuleHandler Delegate..........................................132
RuleArgs Class................................................132
RuleMethod Class .............................................133
ValidationRules Class ..........................................134
BrokenRule Class..............................................137
BrokenRulesCollection Class ....................................137
ValidationException............................................138
Csla.Security Namespace............................................139
RolesForProperty Class.........................................139
AccessType Enum.............................................140
AuthorizationRules Class........................................140
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nCONTENTS ix
Csla Namespace ...................................................143
BusinessBase Class............................................143
BusinessListBase Class.........................................146
ReadOnlyBase Class...........................................159
ReadOnlyListBase Class........................................160
Conclusion ........................................................161
nCHAPTER 4 Data Access and Security ....................................163
Data Portal Design..................................................164
Channel Adapter and Message Router Patterns.....................165
Distributed Transaction Support..................................168
Context and Location Transparency ..............................170
Enhancing the Base Classes..........................................173
FactoryMethods and Criteria....................................175
Save Methods.................................................176
Data Portal Methods ...........................................178
Csla.MethodCaller Class........................................181
Csla.Server.CallMethodException ................................187
Csla.RunLocalAttribute Class....................................188
Csla.DataPortalEventArgs Class..................................188
Csla.DataPortal Class ..........................................189
Csla.Server.IDataPortalServer ...................................197
Csla.DataPortalClient.IDataPortalProxy............................198
Csla.DataPortalClient.LocalProxy.................................198
Csla.DataPortalClient.RemotingProxy .............................200
Csla.Server.Hosts.RemotingPortal................................202
Csla.DataPortalClient.EnterpriseServicesProxy......................204
Csla.Server.Hosts.EnterpriseServicesPortal ........................206
Csla.DataPortalClient.WebServicesProxy ..........................210
Csla.Server.Hosts.WebServicePortal..............................213
Distributed Transaction Support.......................................215
Csla.TransactionalTypes........................................215
Csla.TransactionalAttribute......................................215
Csla.Server.DataPortal .........................................216
Csla.Server.ServicedDataPortal..................................220
Csla.Server.TransactionalDataPortal..............................221
Message Router....................................................222
Csla.CriteriaBase..............................................223
Csla.Server.SimpleDataPortal....................................223