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

Exposing Data as a Service Using ADO.NET Data Services


You have two options to expose data as a service using ADO.NET Data Services:

  • Use a relational database as the data source

  • Use a data source other than a relational database

If you are using a relational database as the data source, you can use LINQ to SQL or Entity Framework to expose the data. On the other hand, you can use collections of objects as a data source too. In either case, you need to create an ADO.NET Data Service using the designer. In the next section, we will discuss how we can create an ADO.NET Data Service.

Creating an ADO.NET Data Service

Here are the steps you should follow to create an ADO.NET Data Service to perform CRUD operations:

  1. 1. Open Visual Studio 2008.

  2. 2. Click on File and then New - Project.

  3. 3. Create a new ASP.NET Web Application from the list of the project templates displayed. This can be seen in the following figure.

  4. 4. Right-click on the project in the solution explorer and choose Add New Item.

  5. 5. Select...