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

The <asp:ObjectDataSource> control


A great way to work with NHibernate data and data-bound controls is to populate the controls with an <asp:ObjectDataSource>. This control allows you to specify what type of objects the control will return (DataObjectTypeName) and what object the control will need to access to perform the CRUD operations (TypeName).

The basic <asp:ObjectDataSource> control just needs four things to get it going, namely, an ID, a DataObjectTypeName (POCO), a Type Name (Data Access Object), and a CRUD method (Create, Read, Update, and Delete). A sample <asp:ObjectDataSource> to retrieve all of the OrderHeader items in the database would look like this:

<asp:ObjectDataSource ID="orderHeaderSource" DataObjectTypeName="Ordering.Data.OrderHeader"TypeName="Ordering.Data.DataAccess.OrderHeaderDataControl" SelectMethod="GetAll" runat="server">
</asp:ObjectDataSource>

Now that we have the ID (orderHeaderSource), we can use it in any data-bound control...