Programming Entity Framework - Cdn.oreilly.com

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Table of Contents Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiii 1. Introducing the ADO.NET Entity Framework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Programming Against a Model, Not Against the Database 2 The Entity Data Model: A Client-Side Data Model 3 The Entity in “Entity Framework” 5 Choosing Your Backend 8 Available Providers 8 Access and ODBC 9 Entity Framework Features 9 The Entity Data Model 9 Entity Data Model Design Tools 9 Managing Objects with Object Services 10 Change Tracking 11 Relationship Management 11 Data Binding 12 EntityClient 12 The Entity Framework in Web Services 12 What About ADO.NET DataSets and LINQ to SQL? 13 DataSets 13 LINQ to SQL 14 Entity Framework Pain Points 14 The Entity Framework Designer 14 Challenges with Change Tracking Distributed Applications 16 Domain-Driven Development 16 Unit Testing 16 Programming the Entity Framework 17 2. Exploring the Entity Data Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Why Use an Entity Data Model? 19 v
The EDM Within the Entity Framework 20 Your First EDM 21 The EDM in the Designer Window 23 Entity Properties 25 Editing the Entity Set and Navigation Property Names 26 The Naked Model: Inspecting the Model’s XML 27 A Less Daunting Model View 27 The Three Parts of the Model 28 CSDL: The Conceptual Schema 30 Schema 31 EntityContainer 31 EntitySet 32 EntityType 33 Associations 35 AssociationSet 37 NavigationProperty 38 Navigation Properties That Return Collections 39 Where Are the Foreign Keys? 41 SSDL: The Store Schema 41 Association and AssociationSet 43 MSL: The Mappings 45 The MSL Elements 46 Database Views in the EDM 49 Code Generation from EDM to Classes 50 Summary 50 3. Querying Entity Data Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Query the Model, Not the Database 51 Your First EDM Query 52 A More Query-Like Query 53 Where Did the Context and Classes Come from? 54 LINQ to Entities Queries 56 ObjectQuery and LINQ to Entities 57 Entity SQL Queries That Return Objects 59 Why Another Way to Query? 59 Entity SQL 60 The Parameterized ObjectQuery 62 Method-Based Syntax Queries for LINQ and Entity SQL 63 LINQ Method-Based Queries 63 ObjectQuery’s Query Builder Methods 66 The Shortest Query 67 EntityClient: The Lowest-Level Method for Returning Streamed Data Through EDM Queries 68 vi | Table of Contents
Page 1 and 2: Free Sampler
Page 3: Programming Entity Framework by Jul
Page 7 and 8: Retrieving a Single Entity with Get
Page 9 and 10: Breaking Apart the ObjectQuery 222
Page 11 and 12: Using a New EntityDataSource to Add
Page 13 and 14: Insert, Update, and Delete Function
Page 15 and 16: Digging Through ObjectStateEntry 53
Page 17 and 18: 19. Using Your Own Custom Classes .
Page 19 and 20: Designing the Service Interface 725
Page 21 and 22: In addition to POCO support, the te
Page 23 and 24: using System.Text; namespace Chapte
Page 25 and 26: } } public ObjectSet Addresses { ge
Page 27 and 28: } If you run the code now, you will
Page 29 and 30: Using Proxies to Enable Change Noti
Page 31 and 32: Figure 13-2. A high-level view of t
Page 33 and 34: Rule 2: To enable lazy loading on a
Page 35 and 36: using System.Collections.ObjectMode
Page 37 and 38: Modifying the POCO Template Althoug
Page 39 and 40: The next step is to modify the temp
Page 41 and 42: get; set; } public string Street1 {
Page 43: Want to read more? You can find thi

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