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

Introducing LINQ


Microsoft states, "The LINQ Project is a codename for a set of extensions to the .NET Framework that encompasses language-integrated query, set, and transform operations. It extends C# and Visual Basic with native language syntax for queries and provides class libraries to take advantage of these capabilities." LINQ can be used to map your business objects and the underlying data sources. These data sources can be databases, objects, collections of objects, or even XML document files. Note that both C# 3.0 and VB 9 have support for LINQ. You can find more information about this from the LINQ FAQ at the MSDN forums.

LINQ is a part of the new versions of the C# and VB.NET compilers and it comes with a powerful set of operators to ease the task of querying different data sources, like SQL Server, XML, and so on. LINQ comprises a standard set of operators to facilitate query operations. We will learn more about LINQ query operators later in this chapter.

Why LINQ?

We often require...