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The DbContext API captures Entity Framework s (EF) most commonly used features and tasks, simplifying development with EF. This concise book shows you how to use the API to perform set operations with the DbSet class, handle change tracking and resolve concurrency conflicts with the Change Tracker API, and validate changes to your data with the Validation API.
With DbContext, you ll be able to query and update data, whether you re working with individual objects or graphs of objects and their related data. You ll find numerous C sharp code samples to help you get started. All you need is experience with Visual Studio and database management basics. Use EF s query capabilities to retrieve data, and use LINQ to sort and filter data Learn how to add new data, and change and delete existing data Use the Change Tracker API to access information EF keeps about the state of entity instances Control change tracking information of entities in disconnected scenarios, including NTier applications Validate data changes before they re sent to the database, and set up validation rules Bypass EF s query pipeline and interact directly with the database
List of contents
Preface
Chapter 1: Introducing the DbContext API
Chapter 2: Querying with DbContext
Chapter 3: Adding, Changing, and Deleting Entities
Chapter 4: Working with Disconnected Entities Including N-Tier Applications
Chapter 5: Change Tracker API
Chapter 6: Validating with the Validation API
Chapter 7: Customizing Validations
Chapter 8: Using DbContext in Advanced Scenarios
Chapter 9: What's Coming Next for Entity Framework
About the author
Julia Lerman is the leading independent authority on the Entity Framework and has been using and teaching the technology since its inception two years ago. She is well known in the .NET community as a Microsoft MVP, ASPInsider and INETA Speaker. She is a prolific blogger, a frequent presenter at technical conferences around the world, including DevConnections and TechEd and she writes articles for many well-known technical publications.Julia lives in Vermont where she runs the Vermont.NET User Group, is a board member of the Vermont Software Developers Alliance, and a member of the Champlain College Software Engineering Advisory Board. You can read her blogs at www.thedatafarm.com/blog.
Summary
In addition to Code First, EF 4.1 introduces simpler EF coding patterns with the DbContext, DbSet, ChangeTracker and Validation APIs. This second mini-book will take the reader on a tour of these new features and how to take advantage of them.
