Building n-Tier ASP.NET WebForms with Entity Framework 4, Lerman
•
3 likes•4,589 views
New England Code Camp 14 presentation on tips & tricks for using new features in EF4 when building WebForms applications with Entity Framework. by Julie Lerman.
Recommended
Recommended
More Related Content
Similar to Building n-Tier ASP.NET WebForms with Entity Framework 4, Lerman
Similar to Building n-Tier ASP.NET WebForms with Entity Framework 4, Lerman (20)
More from Julie Lerman
More from Julie Lerman (18)
Recently uploaded
Recently uploaded (20)
Building n-Tier ASP.NET WebForms with Entity Framework 4, Lerman
- 1. Building n-Tier ASP.NET Web Forms with Entity Framework Julie Lermanthedatafarm.com jlerman@thedatafarm.com Twitter @julielerman
- 2. Julie Lerman consultant/mentor Microsoft MVP, INETA Speaker,ASPInsider, MCP, VTdotNET Leader website theDataFarm.com blog & twitter theDataFarm.com/blog@julielerman book web site LearnEntityFramework.com 2nd Edition (EF4) is now available
- 3. Agenda EF Challenges in Web Apps Review WebForm Options with EF EF4 Tools to the Rescue POCOs and Repositories Leveraging Foreign Keys Putting it all together
- 4. The ASP.net Spectrum with EF Dynamic Data forEntities ObjectDataSource EntityDataSource MVC ADO.NET Data Services Dev WCF n-Tier Architect
- 5. Change Tracking Across Tiers ObjectContext ObjectStateEntry SO1 EntityKey Original ValuesCurrent Values Other ∆ Info ObjectStateEntry SO2 EntityKeyOriginal ValuesCurrent ValuesOther ∆ Info detach entities ObjectStateEntry LIA EntityKeyOriginal ValuesCurrent ValuesOther ∆ Info Original Property Values EntityState Values ObjectStateEntry LIB EntityKeyOriginal ValuesCurrent ValuesOther ∆ Info
- 6. SaveChanges Fails Across Post Backs Page Request Post Back #1 Post Back #2 New Page Class New Page Class New Page Class Create New ObjectContext Create NewObjectContext Create NewObjectContext Get Entities Process Request Get Entities Build HTML using Data & ASP.NET Markup Build HTML using Data & ASP.NET Markup Build HTML using Data & ASP.NET Markup Destroy Page and Dependents Destroy Page and Dependents Destroy Page and Dependents
- 7. EF4 Changes to the Rescue Foreign Keys Big help for selected list values on postback State Methods ApplyCurrentValues, ApplyOriginalValues ChangeState ChangeRelationshipState (when no FKs) POCO Classes & T4 Generation
- 8. What about? Graphs Lazy Loading Returning IQueryables Change Tracking
- 9. POCO Basics With or without code gen from EDMX “Convention” will auto-map classes/entities
- 10. EF Related Architectural Choices Classes vs. Repositories vs.
- 11. Basic Pattern for ASP.NET n-Tier Code Behind Business Logic Repository Transient ObjectContext, Queries CacheEntityKeys, Scalars (inc FKs) Foreign Keys make this approach a possibility Entity Framework
- 12. Julie Lerman consultant/mentor Microsoft MVP, INETA Speaker,ASPInsider, MCP, VTdotNET Leader website theDataFarm.com blog & twitter theDataFarm.com/blog@julielerman book web site LearnEntityFramework.com 2nd Edition (EF4) is now available
- 13. Your Feedback is Important Please fill out a session evaluation form drop it off at the conference registration desk. Thank you!
Editor's Notes
- Abtract: Creating n-tier applications with Entity Framework got a whole lot easier in .NET 4.0. But if you are using ASP.NET Web Forms, there are still some tricks that you’ll need to know, especially if you are not a fan of using the binding sources, such as EntityDataSource and ObjectDataSource. In this session, you’ll see how to create a bridge between your Web Forms and a repository which serves up Entity Framework entities. You’ll lean some of the tools you’ll need to handle related datasuch as master-detail and foreign key