Delphi Programming Guide
Delphi Programmer 

Menu  Table of contents

Part I - Foundations
  Chapter 1 – Delphi 7 and Its IDE
  Chapter 2 – The Delphi Programming Language
  Chapter 3 – The Run-Time Library
  Chapter 4 – Core Library classes
  Chapter 5 – Visual Controls
  Chapter 6 – Building the User Interface
  Chapter 7 – Working with Forms
Part II - Delphi Object-Oriented Architectures
  Chapter 8 – The Architecture of Delphi Applications
  Chapter 9 – Writing Delphi Components
  Chapter 10 – Libraries and Packages
  Chapter 11 – Modeling and OOP Programming (with ModelMaker)
  Chapter 12 – From COM to COM+
Part III - Delphi Database-Oriented Architectures
  Chapter 13 – Delphi's Database Architecture
  Chapter 14 – Client/Server with dbExpress
  Chapter 15 – Working with ADO
  Chapter 16 – Multitier DataSnap Applications
  Chapter 17 – Writing Database Components
  Chapter 18 – Reporting with Rave
Part IV - Delphi, the Internet, and a .NET Preview
  Chapter 19 – Internet Programming: Sockets and Indy
  Chapter 20 – Web Programming with WebBroker and WebSnap
  Chapter 21 – Web Programming with IntraWeb
  Chapter 22 – Using XML Technologies
  Chapter 23 – Web Services and SOAP
  Chapter 24 – The Microsoft .NET Architecture from the Delphi Perspective
  Chapter 25 – Delphi for .NET Preview: The Language and the RTL
  Appendix A – Extra Delphi Tools by the Author
  Appendix B – Extra Delphi Tools from Other Sources
  Appendix C – Free Companion Books on Delphi
  List of Figures    
  List of tables    
  List of Listings    
  List of Sidebars  

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A Word on ADO.NET

ADO.NET is part of Microsoft's new .NET architecture—the company's redesign of application development tools to better suit the needs of web development. ADO.NET is a significant evolution of ADO. It looks at the problems of web development and addresses shortcomings of ADO's solution. The problem with ADO's solution is that it is based on COM. For one- and two-tier applications, COM imposes few problems, but in the world of web development, it is unacceptable as a transport mechanism. COM suffers from three primary problems that limit its use in web development: It (mostly) runs only on Windows, the transmission of recordsets from one process requires COM marshalling, and COM calls cannot penetrate corporate firewalls. ADO.NET's solution to all these problems is to use XML.

Some other redesign issues focus on breaking the ADO recordset into separate classes. The resulting classes are adept at solving a single problem instead of multiple problems. For example, the ADO.NET class currently called DataSetReader is similar to a read-only, forward-only, server-side recordset and, as such, is best suited to reading a result set very quickly. A DataTable is most like a disconnected, client-side recordset. A DataRelation shares similarities with the MSDataShape OLE DB provider. You can see that your knowledge of how ADO works is of great benefit in understanding the basic principles of ADO.NET.

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