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Entity Framework Tutorial (Update) - Second Edition

By : Joydip Kanjilal

2 (4)

Entity Framework Tutorial (Update)

2 (4)

By: Joydip Kanjilal

Overview of this book

The ADO.NET Entity Framework from Microsoft is a new ADO.NET development framework that provides a level of abstraction for data access strategies and solves the impedance mismatch issues that exist between different data models This book explores Microsoft’s Entity Framework and explains how it can used to build enterprise level applications. It will also teach you how you can work with RESTful Services and Google’s Protocol Buffers with Entity Framework and WCF. You will explore how to use Entity Framework with ASP.NET Web API and also how to consume the data exposed by Entity Framework from client applications of varying types, i.e., ASP.NET MVC, WPF and Silverlight. You will familiarize yourself with the new features and improvements introduced in Entity Framework including enhanced POCO support, template-based code generation, tooling consolidation and connection resiliency. By the end of the book, you will be able to successfully extend the new functionalities of Entity framework into your project.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Introducing the ADO.NET Entity Framework

1. Introducing the ADO.NET Entity Framework

What you should know

Looking back

What is the ADO.NET Entity Framework?

A comparative analysis of Entity Framework and other ORM tools

Entity Framework architectural components

System requirements

Performance improvements in Entity Framework 6

New features in Entity Framework 7

Summary

2. Getting Started

2. Getting Started

Designing the UserAuthentication database

Creating the EDM

The DataSource controls

Implementing our first application using the Entity Framework

Summary

3. Entities, Relationships, and the Entity Data Model

3. Entities, Relationships, and the Entity Data Model

Entities, entity types, and relationships in the EDM

Exploring the Security EDM

Summary

4. Working with Stored Procedures in the Entity Data Model

4. Working with Stored Procedures in the Entity Data Model

Creating a database using model-first development

Creating stored procedures

Mapping stored procedures to functions in the EDM

Executing stored procedures using the EDM

Mapping stored procedures that return custom entity types

Summary

5. Working with Entity Client and Entity SQL

5. Working with Entity Client and Entity SQL

An overview of the E-SQL language

From T-SQL to E-SQL

Why E-SQL when I already have LINQ to Entities?

Data paging using E-SQL

Working with the ADO.NET Entity Client

Other operations with E-SQL

Deferred, eager, and lazy loading

Summary

6. Working with LINQ to Entities

6. Working with LINQ to Entities

Introducing LINQ

Understanding the LINQ architecture

Parallel LINQ

Operators in LINQ

Querying data using LINQ

Summary

7. Working with the Object Services Layer

7. Working with the Object Services Layer

What are Object Services?

Performing CRUD operations on objects

Attaching and detaching objects to and from ObjectContext

Serializing and deserializing entity instances

Change tracking and identity resolution using ObjectContext

Understanding the code-first, model-first, and database-first approaches to domain design

Inheritance in Entity Framework

Implementing complex types in the EDM

State management, identity management, and relationship management

Reading objects from the Security database

Inserting objects from the Security database

Editing objects from the Security database

Deleting objects from the Security database

Summary

8. Working with WCF Data Services

8. Working with WCF Data Services

Introducing WCF Data Services

Exposing data as a service using WCF Data Services

Why do we need REST?

What is the OData Protocol?

Working with WCF Data Services and Entity Framework

Working with OData Services using WCF and ASP.NET MVC Framework

Working with Protobuf WCF Services

Summary

A. Advanced Concepts

A. Advanced Concepts

REST and REST-based service frameworks

HTTP methods, request, and response codes

Abbreviations

New features in Entity Framework 7

Suggested reading

Index

Index

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Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Entity Framework 6 now provides support for spatial data types using DbGeography and DbGeometry types."

A block of code is set as follows:

public class User
    {
        public virtual Int32 UserID { get; set; }
        public virtual String UserName { get; set; }
        public virtual String CreatedBy { get; set; }
        public virtual DateTime CreatedDate { get; set; }
        public virtual String ModifiedBy { get; set; }
        public virtual DateTime ModifiedDate { get; set; }
    }

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

static void Main(string[] args)
        { 
            DataContextDataContextvar context = new DataContext(GetConnectionString());
            context.CreateDatabase();
        }

Any command-line input or output is written as follows:

edmgen /mode:fullgeneration /c:"Data Source=.;Initial Catalog=SecurityDB;User ID=sa;Password=sa1@3;" /p:SecurityDB

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "You can see that the Convert to Enum option is enabled."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

Visually different images

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