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

Summary


In this chapter, we have discussed how to enable distributed transaction support for a WCF service. Now we can wrap sequential WCF service calls within one transaction scope and flow the distributed transaction into the WCF services. We can also update multiple databases on different computers all within one single distributed transaction.

The key points discussed in this chapter include:

  • Only certain bindings allow transactions to flow from the client to the WCF service using the transactionFlow attribute

  • A WCF service operation contract can opt to participate in a propagated transaction using the TransactionFlow attribute

  • A WCF service operation can specify its transaction behavior using the TransactionScopeRequired attribute

  • MSDTC network access must be enabled for distributed transaction support among multiple computers

  • The firewall has to be configured to allow msdtc.exe for a distributed transaction to succeed