Book Image

NHibernate 2 Beginner's Guide

By : Aaron Cure
Book Image

NHibernate 2 Beginner's Guide

By: Aaron Cure

Overview of this book

<p>NHibernate is an open source object-relational mapper, or simply put, a way to retrieve data from your database into standard .NET objects. Quite often we spend hours designing the database, only to go back and re-design a mechanism to access that data and then optimize that mechanism. This book will save you time on your project, providing all the information along with concrete examples about the use and optimization of NHibernate.<br /><br />This book is an approachable, detailed introduction to the NHibernate object-relational mapper and how to integrate it with your .NET projects. If you're tired of writing stored procedures or maintaining inline SQL, this is the book for you.<br /><br />Connecting to a database to retrieve data is a major part of nearly every project, from websites to desktop applications to distributed applications. Using the techniques presented in this book, you can access data in your own database with little or no code.<br /><br />This book covers the use of NHibernate from a first glance at retrieving data and developing access layers to more advanced topics such as optimization and Security and Membership providers. It will show you how to connect to multiple databases and speed up your web applications using strong caching tools. We also discuss the use of third-party tools for code generation and other tricks to make your development smoother, quicker, and more effective.</p>
Table of Contents (19 chapters)
NHibernate 2
Credits
About the Author
About the Reviewers
Preface
Index

Time for action – adding a few properties


Now that we have our simple OrderHeader class, we need to create some properties to actually hold our data. Let's get started.

Remember the OrderHeader table we created in Chapter 2, shown in the following screenshot? Let's add the Id and Number fields as properties in our class.

  1. Open the OrderHeader class that we created earlier in this chapter. There are numerous ways to create a property, but we'll start by just creating them manually. Under the default constructor we created earlier, let's create a private variable to hold the Id field. We will create these as private variables to hide the functionality from the end user, as we want them to use our properties.

    Note

    There is no hidden magic in using the underscore ( "_" ) character as a prefix for the private variable. You can use "id", "m_Id", or virtually anything else you want.

  2. In C#, we declare the variable as an int, which is a shortcut for Int32.

    private int _id;

    In VB.NET, we will declare the...