Learn how to build real world nTier applications with the new Entity Framework and related services. With this new technology built into .NET, you can easily wrap an object model around your database and have all the data access automatically generated or use your own stored procedures and views. The session will demonstrate how to create and consume these new technologies from the ground up and focus on database modeling including views and stored procedures along with coding against the model via LINQ. Dynamic data website will also be demonstrated.

1. Building nTier Applications with Entity Framework ServicesPart 1

3. Check Out Your Local User Groups! San Diego Cloud Computing User Group www.azureusergroup.com/group/sandiegoazureusergroup San Diego .NET Developers Group www.sddotnetdg.org San Diego .NET User Group www.sandiegodotnet.com San Diego SQL Server User Group www.sdsqlug.org

4. Win Free Software! Rules Provide your business card (or email and name)* Indicate on the back what software you are interested in Otherwise I will pick  Winners will be picked next week *Yes, most likely I’m going to send you and email about my user group (sddotnetdg.org) and or web site (dotNetTips.com) Prizes CodeRush and Refactor Pro from DevExpress (4) SecondCopy (automatic backup software) (5) * CodeIt.Right Standard from SubMain (4) *Requires mailing address and phone number

5. Agenda

6. Overview

7. nTier Architecture Overview Model to create flexible reusable applications Only need to modify or add layers instead of rewriting entire applications over

8. User Experience Security Active Directory, Card Space, Windows Identity Foundation UI Components Windows Forms, Windows Presentation Foundation, ASP.NET (AJAX, MVC), Silverlight, Windows Mobile Presentation Layer Local Storage/ Cache Communications Layer Windows Communication Foundation (WCF), WCF Data Services, Web Services, Sync Services, Azure (Cloud), RIA Services, Workflow Services Business Layer Business Entities T4 Templates Business Components Business Workflow Windows Workflow Foundation Data Layer Entity Framework, LINQ to SQL, DataSets SQL Server

9. Entity Framework

10. Object Relational Mapping What is ORM? Technique for working with relational tables as if they were objects in memory Intention is to hide away the complexity of the underlying tables and give a uniform way of working with data Why use ORM? Productivity Retain database independence ObjectsClassesEntities

11. Object Relational Mapping It’s nothing new, just new to .NET There are many ORMs for .NET developers already in existence. E.g. LLBLGen Pro http://www.llblgen.com/ Nhibernate http://www.hibernate.org/343.html EntitySpaces http://www.entityspaces.net/Portal/Default.aspx

12. The Microsoft Entity Data Model An extended relational model with Entity-Relationship Model concepts Entity Types Strong type with Identity Inheritance Scalar/Complex properties EntitySets Hold instances of Entity Types Similar to relational tables Can have multiple Entitysets of the same EntityTypes Relationships ("Associations") Named relationships between Entities 0..1:*, 0..1:0..1, 1:1, 1:M, M:N Navigation may be exposed as NavigationProperties on EntityTypes AssociationSets Contains instances of associations May be queried directly EntityContainers Contains EntitySets, AssociationSets SalesPerson EmployeeID = 294272LoginID = adamTitle = "Dev Lead"VacationHours = 0… Manager 1 1 N Reports SalesPerson SalesPerson EmployeeID = 729742LoginID = peteTitle = "Developer"VacationHours = 0…ExpenseAccount = …CarLicenseNum = …… SalesPerson EmployeeID = 729742LoginID = peteTitle = "Developer"VacationHours = 0…ExpenseAccount = …CarLicenseNum = …… EmployeeID = 729742LoginID = peteTitle = "Developer"VacationHours = 0…ExpenseAccount = true…

13. EDM & Entity Framework? The Entity Framework (EF) is an Object Relational Modeling tool leveraging the EDM Focus on your domain, not how to persist! EDM is used to describe your model. Allows different rate of change between database and code! EF uses a storage model and mapping to enable this.

14. ADO.NET Entity Framework

15. EF Providers in Progress

16. LINQ to Entities – Lots of Topics

18. Pain Points in v3.5 SP1 Pluralization/ Singularization Foreign Keys Model First Lazy Loading Additional LINQ Operators L2S Features & Patterns SQL Gen Improvements

19. Fixing the Paint Points in EF1 Advanced/ New Features

20. Model First Create your conceptual model first (not from an existing database) Wizard will allow the creation of sql scripts to create database scripts. Also will create EDM files Creates SQL Server, SQL Server Express, SQL Server Compact database scripts.

21. Lazy Loading Enables retrieving all related data (without asking for it) Off by default Settable on the ContextOptions Good for doing reporting! Not great for going across services Dim ctx As New AdventureWorksLT_DataEntities() ctx.ContextOptions.LazyLoadingEnabled = True

22. T4 Templates Override default EF classes to create… POCO Entity Generator Better for going over RESTful service layers Self-Tracking Entity Generator Better for server/ client local storage. Auto generates classes when models change! Or can be run manually. Easily modifiable for your own needs Once you learn the T4 scripting language.

24. Summary

25. Conclusion

26. Resources ADO.NET Team Blog http://blogs.msdn.com/adonet/default.aspx EF Design Blog blogs.msdn.com/efdesign Visual Studio Data Blog http://blogs.msdn.com/vsdata/ dnrTV! http://shrinkster.com/1734 http://shrinkster.com/1735

27. Resources Dan Simmons Blog http://blogs.msdn.com/dsimmons/ MSDN Code Gallery http://shrinkster.com/1733 WCF Data Services Learning Guide: http://msdn.microsoft.com/en-us/data/bb931106.aspx WCF Data Services Team Blog http://blogs.msdn.com/astoriateam/default.aspx

28. Required Book! EF4 In Aug 2010