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Programming Entity Framework: DbContext [Paperback]

Julia Lerman , Rowan Miller

List Price: CDN$ 26.99
Price: CDN$ 25.18 & FREE Shipping. Details
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Book Description

March 10 2012 1449312969 978-1449312961 1

The DbContext API captures Entity Framework’s (EF) most commonly used features and tasks, simplifying development with EF. This concise book shows you how to use the API to perform set operations with the DbSet class, handle change tracking and resolve concurrency conflicts with the Change Tracker API, and validate changes to your data with the Validation API.

With DbContext, you’ll be able to query and update data, whether you’re working with individual objects or graphs of objects and their related data. You’ll find numerous C# code samples to help you get started. All you need is experience with Visual Studio and database management basics.

  • Use EF’s query capabilities to retrieve data, and use LINQ to sort and filter data
  • Learn how to add new data, and change and delete existing data
  • Use the Change Tracker API to access information EF keeps about the state of entity instances
  • Control change tracking information of entities in disconnected scenarios, including NTier applications
  • Validate data changes before they’re sent to the database, and set up validation rules
  • Bypass EF’s query pipeline and interact directly with the database

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Product Description

Book Description

Querying, Changing, and Validating Your Data with Entity Framework

About the Author

Julia Lerman is the leading independent authority on the Entity Framework and has been using and teaching the technology since its inception in 2006. She is well known in the .NET community as a Microsoft MVP, ASPInsider, and INETA Speaker. Julia is a frequent presenter at technical conferences around the world and writes articles for many well-known technical publications including the Data Points column in MSDN Magazine.

Julia lives in Vermont with her husband, Rich, and gigantic dog, Sampson, where she runs the Vermont.NET User Group. You can read her blog at www.thedatafarm.com/blog and follow her on Twitter at julielerman.

Rowan is based in Seattle, Washington and works as a Program Manager for the ADO.Net Entity Framework team at Microsoft. Prior to moving to the US he resided in the small state of Tasmania in Australia. Rowan speaks at technical conferences and blogs at http://romiller.com. Outside of technology Rowan's passions include snowboarding, mountain biking, horse riding, rock climbing and pretty much anything else that involves being active. The primary focus of his life, however, is to follow Jesus.


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Amazon.com: 4.3 out of 5 stars  29 reviews
4 of 4 people found the following review helpful
5.0 out of 5 stars The Book on DbContext June 10 2012
By G. van Staden - Published on Amazon.com
Format:Kindle Edition
DbContext is covered in extreme detail in this book. The pace is gradual but you will really know how to use DbContext after reading this.

Given that DbContext is part of Entity Framework, I understand the need to make reference to other EF books. I think the book exploits this a bit and the numerous references to the authors' other books is annoying. The example code is also based on the authors' other books but, even if you have not read them, is understandable and useful.

The coverage ranges from an introduction to what DbContext is and how it fits-in to Entity Framework, through how it works and on to the future vision for DbContext and Entity Framework. This book contains more than recipes for successful use. Great detail is given as to how DbContext and EF work with code to create database queries, track changes and manipulate data.

In combination with the supporting website, which is excellent, this book is a valuable resources for anyone really wanting to gain complete understanding of DbContext.
3 of 3 people found the following review helpful
5.0 out of 5 stars Best Book on DBContext May 7 2012
By George - Published on Amazon.com
Format:Paperback
Julia Lerman is one of my go to people when it comes to Entity Framework. Between her several books, blogs and videos, she is one of the main sources for Entity Framework information.
Julia and Rowan writing style is easy to understand. The book is full of code examples without over doing it. The book is only a couple hundred pages, but covers the topic very well.
DbContext is only a part of Entity Framework, but an important part. Understanding it will make using Entity Framework much easier and make the developer much more productive.
Just understanding the differences between Lazy Loading, Eager Loading, Explicit Loading and understanding when your queries are querying against the database or local memory is worth getting the book.
The authors have other books on programming Entity Framework, but this is the most in-depth book covering DbContext. Not the first place to learn about Entity Framework, but when it comes to DbContext, at the moment, there is nothing better.
2 of 2 people found the following review helpful
5.0 out of 5 stars Get this one Nov. 13 2012
By Amr - Published on Amazon.com
Format:Paperback
I found solutions in this book for some problems that i did not find somewhere else .I haven't read all the book but this is enough to say there is good effort behind it . I will sure read all of it , just need more time .
2 of 2 people found the following review helpful
5.0 out of 5 stars Great Guided Tour of the API April 6 2012
By Liles Family - Published on Amazon.com
Format:Paperback
I just finished this on my kindle and I have to say, well done. It is a great guided tour of the API and will help just about everyone in some way. I especially like the validation dive, as well as the detailed explanations of the change tracker API. When you get into distributed transactions and dealing with N-tier applications, this is required knowledge. Having this as a reference is invaluable and should be a reserved spot in the library for anyone writing Code First Entity Framework.
1 of 1 people found the following review helpful
5.0 out of 5 stars excellent book May 1 2014
By C. Barker - Published on Amazon.com
Format:Kindle Edition|Verified Purchase
I read the Entity Framework 2e book and I never felt I had a grasp on EF; in fact, I was even more confused. This book (DbContext) along with the Entity Framework: Code First gave me what I needed to competently develop in EF. DbContext and Code First are much more coherently laid out. You will want to read BOTH DbContext and Code First to get a complete grasp.

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