Book Image

Entity Framework Tutorial

By : Joydip Kanjilal
Book Image

Entity Framework Tutorial

By: Joydip Kanjilal

Overview of this book

<p>The ADO.NET Entity Framework is a new way to build the data access layer of your Windows or web applications. It's an Object Relational Mapping (ORM) technology that makes it easy to tie together the data in your database with the objects in your applications, by abstracting the object model of an application from its relational or logical model.<br /><br />This clear and concise book gets you started with the Entity Framework and carefully gives you the skills to speed up your application development by constructing a better data access layer. It shows you how to get the most from the ADO.NET Entity Framework to perform CRUD operations with complex data in your applications.<br /><br />This tutorial starts out with the basics of the Entity Framework, showing plenty of examples to get you started using it in your own code. You will learn how to create an Entity Data Model, and then take this further with Entity types. You will also learn about the Entity Client data provider, learn how to create statements in Entity SQL, and get to grips with ADO.NET Data Services, also known as Project Astoria.</p>
Table of Contents (13 chapters)
Entity Framework Tutorial
Credits
About the Author
About the Reviewer
Preface

Chapter 6. Working with LINQ to Entities

LINQ, or Language Integrated Query as it is called, is a query translation pipeline that has been introduced as part of the C# 3.0 library. It is an extension to the C# language and provides a simplified framework for accessing relational data in a strongly typed and object oriented way. You can even use LINQ to query data from other data sources such as XML, objects, and collections.

In this chapter, we will discuss LINQ to Entities. We will learn how to use LINQ on top of the Entity Framework and how LINQ can be used to query data against the Entity Data Model. We will start our discussion with a quick look at what LINQ is and examine some of its features.

In this chapter, we will learn about the following:

  • Introducing LINQ;

  • Benefits and Features of LINQ

  • Components of the LINQ Architecture

  • Understanding LINQ to Entities

  • Operators in LINQ

  • Expressions in LINQ

Introducing LINQ

Microsoft states, "The LINQ Project is a codename for a set of extensions to the...