1. Copyright © 2004 J. Ambrose Little Introduction to Object-Relational Mapping for.NET

2. Copyright © 2004 J. Ambrose Little Little ‘bout Me dotNetTemplar.Net ASP.NET MVP ASPInsiders ASPAlliance.com GTE Federal Credit Union Life Beyond the Bits

3. Copyright © 2004 J. Ambrose Little What is Object-Relational Mapping? The need for RDBMS. The need for OOD/OOP. The need for OOD/OOP to talk to RDBMS. The need for RAD and long-term manageability.

4. Copyright © 2004 J. Ambrose Little Problems Querying Updating Mapping Performance

5. Copyright © 2004 J. Ambrose Little Solutions Querying: OPath, Query Builder, Sprocs, Etc. Updating: SQL, Commands, Transactions, Etc. Mapping: XML/text files, Attributes. Performance: Caching

6. Copyright © 2004 J. Ambrose Little Mapping XML Configuration (Wilson O/R Mapper) XML Configuration (NHibernate)

7. Copyright © 2004 J. Ambrose Little Mapping Custom Attributes (DataAspects)

8. Copyright © 2004 J. Ambrose Little Querying OPath (an OO SQL/XPath) Query Building (NHibernate)

9. Copyright © 2004 J. Ambrose Little Querying Query Building (eXpress Persistent Objects) (DefaultAddress.City <> "Chicago" AND not (Company is null))

10. Copyright © 2004 J. Ambrose Little Querying Stored Procedures and Dynamic T-SQL Custom Attributes (DataAspects)

11. Copyright © 2004 J. Ambrose Little Updating Commands and SQL Generation Use Mappings to Generate Commands and Parameters and, optionally, T-SQL.

12. Copyright © 2004 J. Ambrose Little Updating Transactions

13. Copyright © 2004 J. Ambrose Little Performance Is this as fast as straight, hand-written (or generated) ADO.NET? –Compared to 2-tier? –Compared to n-tier? 1000 DataAspects CRUD operations took 5046.8427 milliseconds. 1000 straight ADO.NET CRUD operations took 5281.2162 milliseconds. How is this possible?

14. Copyright © 2004 J. Ambrose Little Extensibility Does your O-R mapper allow you to use more than one database?

15. Copyright © 2004 J. Ambrose Little Some Examples

16. Copyright © 2004 J. Ambrose Little Future Features Built-In Paging Procedure Generation Easier API for Collections More Options for Querying VB Examples

17. Copyright © 2004 J. Ambrose Little Other Resources DotNetTemplar – http://dotNetTemplar.net Get Demo Project & Library - http://dotNetTemplar.Net/Downloads/LearnDataAspects.zip Object Spaces –http://msdn.microsoft.com/data/winfs/ –http://blogs.msdn.com/aconrad/ WilsonORMapper –http://www.wilsondotnet.com/ eXpress Persistent Objects –http://www.devexpress.com/products/NET/XPO/ Other O-R Libraries (Some Free, Some Not) –http://url123.com/z7mqb