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

Summary


In this chapter, we talked a little bit about what NHibernate is, and why we should use it. We also touched on what HBM mapping files are and what they are used for, as well as the Plain Old CLR Objects (POCOs) that NHibernate actually maps data into. Neither of these would be very helpful to us without some Data Access Object (DAO) classes to tell NHibernate to retrieve or save the data we are working with. Finally we looked at a simple web page that was databound to a collection of NHibernate objects, all without any codebehind or other additional code.

It may seem like creating all these files is a lot of work, and it might be simpler to just go back to handcoding the SQL! I would tend to agree with you, if I didn't know the shortcut to creating all of these files—code generation, or even better, using Fluent NHibernate! If you can't wait, then sneak a peek at Chapter 4, Data Cartography, for more about Fluent NHibernate.

Now that we have skimmed the surface on how NHibernate works and how to make it work for us, let's talk about database layout and design, which is the subject of our next chapter.