05 entity framework
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The document discusses different workflows for using Entity Framework to access and manage data, including model first, database first, and code first approaches. It also covers using Entity Framework with WCF Data Services to expose data via OData endpoints. Key topics include entity data models, reverse engineering databases, defining mappings, and generating databases from code using migrations. Live demos are provided for database first and code first workflows as well as creating and consuming a WCF Data Services API.
05 entity framework
- 1. 05 | Data Access with Entity Framework Bruno Terkaly | Technical Evangelist Bret Stateham | Technical Evangelist
- 2. Module Overview • Entity Data Models • Developer Workflows • WCF Data Services
- 4. Object/Relational Mappers (ORMs) Model / Classes Relational Database {;} {;} {;} Object/Relational Mapper
- 5. Entity Framework Designer Models Model / Classes Entity Framework Conceptual Schema Definition Language (CSDL) Mapping Specification Language (MSL) Store Schema Definition Language (SSDL) EDMX Relational Database {;} {;} {;}
- 6. Entity Framework Architecture Model / Classes Entity Framework Object Services (DbContext) Entity Client (ado.net / Entity SQL) Entity Framework Data Providers (SQL Server…) Relational Database {;} {;} {;}
- 7. Get it With NuGet. Got It? • Entity Framework 6 is RTM • EntityFramework.codeplex.com – Open Source – Nightly Builds – Accept pull requests from the community • Installable from NuGet – Release versions – Pre-Release if you choose to include them
- 8. Entity Framework Data Providers • Microsoft Ships support for – Microsoft SQL Server (Via the EntityFramework NuGet Package) – Microsoft SQL Server Compact Edition (Via the EntityFramework.SqlServerCompact NuGet Package) • 3rd Party Providers – DevArt dotConnect Data Providers (devart.com) • Oracle • MySQL • SQLite • others – Firebird (FirebirdSQL.org)
- 10. Entity Framework Workflows New Database Existing Database Use Designer Write Code Model First: • Create your model in the designer • Database is generated from model • Classes are generated from model • Can update model • Database updates replace old objects Database First: • Reverse engineer existing database • Designer generates model • Classes are generated off the model • You can update the database • You can modify the classes / mapping Code First: • Create your classes in code • Mappings are defined in code • Database is generated from code • Updates are done using “migrations” Code Second: (not an official name) • Create your classes in code • Use Entity Framework Power Tools • Reverse engineer model in designer
- 11. Database First New Database Existing Database Use Designer Write Code Model First: • Create your model in the designer • Database is generated from model • Classes are generated from model • Can update model • Database updates replace old objects Database First: • Reverse engineer existing database • Designer generates model • Classes are generated off the model • You can update the database • You can modify the classes / mapping Code First: • Create your classes in code • Mappings are defined in code • Database is generated from code • Updates are done using “migrations” Code Second: (not an official name) • Create your classes in code • Use Entity Framework Power Tools • Reverse engineer model in designer
- 12. DEMO Database First Workflow
- 13. Code First Workflow New Database Existing Database Use Designer Write Code Model First: • Create your model in the designer • Database is generated from model • Classes are generated from model • Can update model • Database updates replace old objects Database First: • Reverse engineer existing database • Designer generates model • Classes are generated off the model • You can update the database • You can modify the classes / mapping Code First: • Create your classes in code • Mappings are defined in code • Database is generated from code • Updates are done using “migrations” Code Second: (not an official name) • Create your classes in code • Use Entity Framework Power Tools • Reverse engineer model in designer
- 14. DEMO Code First Workflow
- 16. OData Where Art Though? • OData is a protocol for creating and consuming data APIs • Check it out at OData.org • Provides a standard way to use REST to expose & consume data
- 17. WCF Data Services • A convenient way to create OData services • Can expose most any model as Odata • Entity Framework is a great way to build your models • WCF Data Services 5.6.0 Available via NuGet – WCF Data Services Server – Microsoft.Data.Services – WCF Data Services Client – Microsoft.Data.Services.Client • Access Data using URIs or a Client Library – OData Query String Options
- 18. DEMO Creating and Consuming a WCF Data Service
- 19. ©2013 Microsoft Corporation. All rights reserved. Microsoft, Windows, Office, Azure, System Center, Dynamics and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
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