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Entity Framework Tutorial (Update)

Entity Framework Tutorial (Update) - Second Edition

By : Joydip Kanjilal
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Entity Framework Tutorial (Update)

Entity Framework Tutorial (Update)

2 (4)
By: Joydip Kanjilal

Overview of this book

The ADO.NET Entity Framework from Microsoft is a new ADO.NET development framework that provides a level of abstraction for data access strategies and solves the impedance mismatch issues that exist between different data models This book explores Microsoft’s Entity Framework and explains how it can used to build enterprise level applications. It will also teach you how you can work with RESTful Services and Google’s Protocol Buffers with Entity Framework and WCF. You will explore how to use Entity Framework with ASP.NET Web API and also how to consume the data exposed by Entity Framework from client applications of varying types, i.e., ASP.NET MVC, WPF and Silverlight. You will familiarize yourself with the new features and improvements introduced in Entity Framework including enhanced POCO support, template-based code generation, tooling consolidation and connection resiliency. By the end of the book, you will be able to successfully extend the new functionalities of Entity framework into your project.
Table of Contents (11 chapters)
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Index

Chapter 5. Working with Entity Client and Entity SQL

Entity Framework contains a powerful client-side query engine that allows you to execute queries against the conceptual model of data, irrespective of the underlying data store in use. This query engine works with a rich functional language called Entity SQL (or E-SQL for short), a derivative of Transact SQL (T-SQL), that enables you to query entities or a collection of entities.

In this chapter, we will take a look at both Entity Client and E-SQL and learn how to use them in our applications.

We will discuss the following areas:

  • An overview of the E-SQL language
  • Differences between E-SQL and T-SQL
  • When to choose E-SQL over LINQ
  • Working with the Entity Client
  • Transaction management in Entity Framework
  • Deferred loading and eager loading

Before we get started with Entity Client, we should have a proper understanding of E-SQL. This is a T-SQL-like query language used by the Entity Client provider. We will start this chapter with a discussion...

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