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
About the Author
About the Reviewers


LINQ to Entities supports three types of inheritance: Table Per Hierarchy (TPH) inheritance, Table Per Type (TPT) inheritance, and Table Per Concrete (TPC) inheritance. As table per concrete inheritance is not used as often as table per hierarchy and table per type inheritance, in this book we will only cover the first two inheritance types.

LINQ to Entities Table per Hierarchy inheritance

In Table per Hierarchy inheritance there is a single database table that contains fields for both parent information and child information. With relational data a discriminator column contains the value that determines which class any given record belongs to.

For example, consider a Persons table that contains everyone employed by a company. Some people are employees and some are managers. The Persons table contains a column named EmployeeType that has a value of 1 for managers and a value of 2 for employees; this is the discriminator column.

In this scenario you can create a child entity of employees...