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


In this chapter, we have learned new features related to LINQ including the new data type, var, object and collection initializers, extension methods, lambda expressions, LINQ syntax, and query expressions. Now that we have the required knowledge for LINQ, we are ready to try LINQ to Entities, which will be discussed in the next chapters.

The key points covered in this chapter include:

  • The new data type, var, gives extra flexibility when defining new variables

  • The Automatic Property feature can be used to define simple properties

  • Initial values can be assigned to a new object and collection variables by using Object initializer and Collection initializer

  • Actual types will be created for anonymous types at compile time

  • Extension methods can be used to extend the public contract of an existing CLR type without having to subclass or recompile the original type

  • Lambda expression is just another way of writing anonymous methods in a more concise and functional syntax

  • Many LINQ-specific extension...