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LINQ in Action (Paperback)

~ (Author), (Author), (Author), Matt Warren (Foreword)

4.5 out of 5 stars See all reviews (30 customer reviews)

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Product Description

LLINQ, Language INtegrated Query, is a new extension to the Visual Basic and C# programming languages designed to simplify data queries and database interaction. It addreses O/R mapping issues by making query operations like SQL statements part of the programming language. It also offers built-in support for querying in-memory collections like arrays or lists, XML, DataSets, and relational databases.

"LINQ in Action" is a fast-paced, comprehensive tutorial for professional developers. This book explores what can be done with LINQ, shows how it works in an application, and addresses the emerging best practices. It presents the general purpose query facilities offered by LINQ in the upcoming C# 3.0 and VB.NET 9.0 languages. A running example introduces basic LINQ concepts. You'll then learn to query unstructured data using LINQ to XML and relational data with LINQ to SQL. Finally, you'll see how to extend LINQ for custom applications.

"LINQ in Action" will guide you along as you explore this new world of lambda expressions, query operators, and expression trees. As well, you'll explore the new features of C# 3.0, VB.NET 9.0. The book is very practical, anchoring each new idea with running code. Whether you want to use LINQ to query objects, XML documents, or relational databases, you will find all the information you need to get started

But "LINQ in Action" does not stop at the basic code. This book also shows you how LINQ can be used for advanced processing of data, including coverage of LINQ's extensibility, which allows querying more data sources than those supported by default. All code samples are built on a concrete business case. The running example, LinqBooks, is apersonal book cataloging system that shows you how to create LINQ applications with Visual Studio 2008.

About the Author

Fabrice Marguerie is a software architect and developer based in Paris, France. Fabrice is a C# MVP has been working with LINQ from the first prototypes.

Steve Eichert is a Sr. Software Engineer for Algorithmics, Inc. based in Philadelphia, PA.

Jim Wooley has been working with .NET since PDC 2000 and has been actively evangelizing LINQ since its announcement in 2005. He leads the Atlanta VB Study Group and serves as INETA Membership Manager for the Georgia region.

Product Details

Paperback: 600 pages
Publisher: Manning Publications (February 1, 2008)
Language: English
ISBN-10: 1933988169
ISBN-13: 978-1933988160
Product Dimensions: 9.2 x 7.4 x 1.3 inches
Shipping Weight: 2.1 pounds (View shipping rates and policies)

Average Customer Review: 4.5 out of 5 stars See all reviews (30 customer reviews)

Amazon.com Sales Rank: #75,132 in Books (See Bestsellers in Books)

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#33 in	Books > Computers & Internet > Microsoft > Development > Visual Basic
#54 in	Books > Computers & Internet > Programming > Languages & Tools > C#
#98 in	Books > Computers & Internet > Databases > SQL

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Customer Reviews

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22 of 22 people found the following review helpful:

5.0 out of 5 stars This book is a pure pleasure to read..., February 9, 2008

By	T. Anderson (PA USA) - See all my reviews (TOP 1000 REVIEWER) (REAL NAME)

This book is a pure pleasure to read. The presentation of content is awesome. They breakdown code in a new refreshing way that I have not seen before. Maybe it is done in all the Action Books from Manning, but this is the first I have read. They use code annotations to show what the code is doing at all the key points, highlighting important concepts. The beginner will benefit greatly from this, as will the experienced developer getting into the new C# language features.

The book presents both VB.NET and C# code examples. This is definitely cool. It is something that has been lost with many publishers. I guess the publishers know they can possibly sell 2 of the same book if they make one for each language. Yeah, yeah, I know... you should be able to easily bounce back and forth between languages with no effort. Well since I don't allow VB.NET on any of my projects, I rarely get to see it since books no longer present both languages. So this is a refreshing change. I still have to deal with inherited projects, so it is nice to have a book that contains my language of choice, but makes available the VB.NET syntax incase I need it.

The book has an awesome introduction covering the history of LINQ, which also presents all the problems that LINQ solves and the design goals of linq.

The book covers ever new feature in the .NET 3.5 languages (C# and VB.NET) that were needed in order to implement LINQ. They include Implicitly typed local variables, Object initializers, Lambda expressions, Extension methods, and Anonymous types.

The book covers LINQ to XML, LINQ to SQL, and LINQ to Objects in great detail. They also offer a bonus chapter from the Manning Site for LINQ to Datasets.

One of my favorite sections was Performance Considerations. They do a great job covering tradeoffs.

The book winds down with a chapter on extending LINQ and how link fits into an n-tier architecture.

The downloadable code is very well organized and is very usable. The authors have a great support site.

I highly recommend any developer moving into .NET 3.5 add this book to their library. It will arm you with everything you need to produce production level code.

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15 of 15 people found the following review helpful:

5.0 out of 5 stars Why this book?, February 9, 2008

By	B. Hayat (FL, USA) - See all my reviews (REAL NAME)

Why should you get this book?
I started following the LINQ development while it was in beta stage and I was trying to find bits and pieces, here and there to make sense out of this technology. LINQ is something different than other technologies when it comes to learning it. It's like walking down a slope. If you don't follow the proper path, you can slip, in any moment. What do I mean by that? For MSFT to develop and build LINQ, they had to build and evolve a series of other technologies that will be used in LINQ. LINQ is developed on the top of a series of other technologies within .Net framework and the C# (VB also) language to be able to do what it does.
The sequence you learn these other technologies is as important as learning LINQ in the first place. By properly learning the foundation correctly, you will then see how sweet and powerful LINQ can and will be.

Now, why this book? Among all the materials and books I've read on this subject, this is the only book that truly follow this path. You follow the book, you learn LINQ. It's as simple as this!

I was involve with the "Early Access" program on this book and I saw how these three authors worked to make it better and better. They listened to readers and made it better. I wish other authors would take the time to write their book as well as this book. I give it Five stars!!!

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8 of 8 people found the following review helpful:

5.0 out of 5 stars An excellent in-depth tour through LINQ, March 2, 2008

By	Patrick Smacchia - See all my reviews

The book is very well-written and very comprehensive. The authors made a great job at writing a book that can be read from cover to cover. The book begins with some reminders on LINQ history to understand where LINQ is coming from and why it is making life as a .NET developers more easier. Then come the language explanations, the part where you will see how C# and VB.NET have been tweaked to support LINQ syntax (btw, the book covers both C# and VB.NET LINQ and it is great to compare the different choices made). This part is really essential if you are considering using LINQ. Indeed, LINQ is coming from functional languages, something that most of us are not acquainted with, and it is disturbing at the beginning to understand things such as deferred execution. I found that a lot of energy has been put in pedagogy for readers that come with a classical OOP background.

Then comes the Part 2 on LINQ to object. This part is also vital because you will quickly realize that LINQ is about to definitely change the way your C# or VB.NET code looks like. Most of the algorithms we code rely intensively on collections and LINQ to object represents an incredibly powerful syntax to work with collections. Here also the authors worked really hard to explain properly the 'why/when/how to' things and to anticipate just in time the questions you might have.

Then comes part 3 and 4, on the 2 major LINQ flavors: LINQ to SQL and LINQ to XML. They represent a great opportunity to see some real-world use of what you've learnt in the 2 first parts. What I really liked here is that the authors anticipate the various scenarios (both common and advanced) you will face by using these 2 implementations of LINQ.

Then comes the great final, the part 5 that focus on how to extend LINQ to your own needs. LINQ is coming with several different extension points, from the single operator rewriting that will take you 2 minutes to write to the complete query framework that will take months to be written. This part explains and compares all these possibilities and can, alone, motivate you to buy the book if you plan to extend LINQ. LINQ extensibility is followed by another great chapter named 'LINQ in every layer' that put up together all knowledge presented until there to see how real-world applications are impacted by LINQ.

Something I would like to underline is that authors kept an objective eyes on LINQ. They warn you about the temptation to use LINQ for everything. What is awesome is that in a wide range of cases, LINQ represents both a new powerful syntax and also offers optimal performance. But for some other cases LINQ will execute much more slowly than a good old foreach style programming.

I highly recommend learning and using LINQ now because a lot of things is going to happen soon with LINQ, with things such as Parallel LINQ (PLINQ, to write queries that will execute on several threads at a time) , LINQ to Xsd (to write strongly typed XML queries), the ADO.NET Entities Framework (the Microsoft answer to O/R mapping) and more...

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Most Recent Customer Reviews

4.0 out of 5 stars Light on LINQ to SQL
This book has very good coverage on LINQ to Object and LINQ to XML, but is light on LINQ to SQL.

If you need to use LINQ to SQL at your job, go for Pro LINQ from... Read more

Published 2 months ago by George Jiang

2.0 out of 5 stars Incomplete Overview
I am a fan of the Manning "in Action" books, but this has been a serious disappointment. I am a reasonably experienced developer that needed to get up to speed quickly. Read more

Published 4 months ago by High Desert Girl

4.0 out of 5 stars LINQ in Action rocks
I was pleased with overall quality of this book. By and large this is the most comprehensive LINQ book currently available on the market. Read more

Published 13 months ago by Software Architect

5.0 out of 5 stars A required desktop reference
I think the expression is "don't cry over spilled milk...", well when my son spilled milk on this book I almost cried. Why would you cry over a book you ask? Read more

Published 13 months ago by Joseph Guadagno

3.0 out of 5 stars Stutters onthe most important area
Most of the reviewers have given high marks for this book. No issue with that, as long as the first six chapters of this book are concerned. Read more

Published 15 months ago by Book Worm

5.0 out of 5 stars Great detail. Well organized and thorough.
This was one of the best technical books I've ever read. It was easy to follow and understand. The examples were very clear and the section on the new features of VB and C# were... Read more

Published 15 months ago by GW

5.0 out of 5 stars Great Tutorial on LINQ
The book covers a lot of topics that emcompass LINQ including LINQ basics, but also LINQ to SQL, LINQ to XML. Read more

Published 15 months ago by Shawn Wildermuth

5.0 out of 5 stars An important book, on an important topic
LINQ in Action, at 600 pages provides a substantial introduction and in-depth discussion of LINQ, its history, its impact, and most important - its syntax and features. Read more

Published 16 months ago by Troy Magennis

3.0 out of 5 stars Linq in Action
This book is best used with a companion book covering basic C# terms. I found that I had to refer to the internet for explanations of terms. Read more

Published 17 months ago by Harry Goldstein

5.0 out of 5 stars Very, very nice and good book
This is a very nicely written book.
Clear explanations, concepts are introduced gradually and build on each other with no forward references, simple and to the point code... Read more

Published 17 months ago by Daniel

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