Book Image

WCF 4.0 Multi-tier Services Development with LINQ to Entities

By : Mike Liu
Book Image

WCF 4.0 Multi-tier Services Development with LINQ to Entities

By: Mike Liu

Overview of this book

WCF is the Microsoft model for building services, whereas LINQ to Entities is the Microsoft ORM for accessing underlying data storage. Want to learn both? You would normally have to dig through huge reference tomes—so wouldn't you agree that a simple-to-follow practical tutorial on WCF and LINQ to Entities is the way to get ahead?This book is the quickest and easiest way to learn WCF and LINQ to Entities in Visual Studio 2010. WCF and LINQ to Entities are both powerful yet complex technologies from Microsoft—but you will be surprised at how easily this book will get you get up and running with them.Mastery of these two topics will quickly enable you to create Service-Oriented applications, and allow you to take your first steps into the world of Service Oriented Architecture without becoming overwhelmed.Through this book, you will learn what's going on behind the scenes with WCF, and dive into the basic yet most useful techniques for LINQ to Entities. You will develop three real-world multi-tiered WCF services from beginning to end, with LINQ to Entities being used in the data access layer of the services. Various clients including windows console applications, the WCF Test Client, Windows Form applications and WPF applications will be created to test these WCF services. By the end of this book, you will be 100% confident that you know WCF and LINQ to Entities, not only in theory, but with sound real-world experience.
Table of Contents (16 chapters)
WCF 4.0 Multi-tier Services Development with LINQ to Entities
Credits
About the Author
About the Reviewers
Preface
Index

Calling a stored procedure


Calling a stored procedure is different from calling a table or a view because a stored procedure can't be called directly. A function import has to be added for the stored procedure and its result set has to be mapped. The modeling of a stored procedure is also different from modeling a table or view. In the following sections we will explain how to call a simple stored procedure, how to map the returned result of a stored procedure to an entity class, and how to create a new entity for the result set.

We will reuse the same application that we used in the previous chapter and add more testing methods to the program.

Mapping a stored procedure to a new entity class

First we will try to call a simple stored procedure. In the sample database there is a stored procedure called "Ten Most Expensive Products". We will call this stored procedure to get the top ten most expensive products.

Modeling a stored procedure

Before we can call this stored procedure we need to model...