Book Image

Entity Framework Tutorial (Update) - Second Edition

By : Joydip Kanjilal
Book Image

Entity Framework Tutorial (Update) - Second Edition

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 (16 chapters)
Entity Framework Tutorial Second Edition
About the Author
About the Reviewers

Other operations with E-SQL

In this section, we will take a look at how we can perform some additional operations with the E-SQL language. We will discuss the following:

  • Inserting a record using E-SQL

  • Inserting a record with a foreign key constraint

  • Retrieving native SQL from EntityCommand

  • Transaction management in E-SQL

Inserting a record using E-SQL

You can use E-SQL statements and easily perform CRUD operations. Let's assume that you have a stored procedure called InsertDesignation and you would like to use it to store a record in the designation table of your Payroll database. This is the code:

using (EntityConnection var conn = new EntityConnection("Name=PayrollEntities"))
    EntityCommandvar cmd = conn.CreateCommand();
    cmd.CommandText = "PayrollEntities.Employee_Insert";
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Parameters.AddWithValue("FirstName", "Joydip");
    cmd.Parameters.AddWithValue("LastName", "Kanjilal");