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>

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NHibernate 2 Beginner's Guide
Aaron Cure
May, 2010 | 276 pages
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Table of Contents (19 chapters)
NHibernate 2
NHibernate 2
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
Preface
Preface
Free Chapter
1
First Look
First Look
What is NHibernate?
Why would I use it?
Where do I get it?
Can I get help using NHibernate?
Database table
The XML mapping file (hbm.xml)
Plain Old CLR Object ( POCO )
Data access
Look how easy it is to use!
Summary
2
Database Layout and Design
Database Layout and Design
Before you get started
Laying the foundation—table layouts
Time for action – creating an ordering system database
Table layouts
NHibernate assigned IDs
Relationships
Normal Form
Putting it all together
Time for action – adding some tables to our Ordering system database
Summary
3
A Touch of Class
A Touch of Class
Start up our applications
Creating objects
Time for action – creating our first class
Public properties and private variables
Time for action – adding a few properties
Converting SQL database types to .NET types
Properties for Foreign Keys
Summary
4
Data Cartography
Data Cartography
What is mapping?
Types of mapping
XML mapping
Mapping our types
Time for action – mapping basic types
Relationships
Time for action – mapping relationships
Fluent mapping
Summary
5
The Session Procession
The Session Procession
What is an NHibernate session?
Time for action – getting ready
What is a session factory?
Creating your first session
Why do we call .Commit()?
NHibernate session versus database session?
Time for action – creating a session and doing some CRUD
Sessions in ASP.NET
Summary
6
I'm a Logger
I'm a Logger
Why do we need to log?
Why log4net?
Getting started
Configuration
Time for action – adding some logging
NHibernate log messages
Appenders
Creating a logger
Time for action – adding some custom logging
Summary
7
Configuration
Configuration
Looking back
The basics of configuration
Taking a look at the SQL
Abstracting the configuration
Time for action – moving our configuration
XML configuration
Summary
8
Writing Queries
Writing Queries
Using Data Access Objects
The basic Data Access Object
Time for action – creating our basic Data Access Object
Data Access Object methods
Time for action – adding some CRUD methods
Coding some GetX() methods
The FieldNames structure
Time for action – expanding our capabilities
The ICriteria object
Creating a GetAll() method
Paging and Sorting GetAll() methods
Filtering ICriteria
Time for action – replacing our inline code
Summary
9
Binding Data
Binding Data
Why should we use data binding?
Time for action – adding an ASP.NET project
Basic data binding techniques
Common data binding methods
A simple templated control
Creating a control instance
The <asp:ListView> control
The <asp:ObjectDataSource> control
Time for action – adding our first data bound control
Direct data binding
One last control—the <asp:FormView>
Summary
10
.NET Security
.NET Security
Built-in controls
Time for action – adding a login to our page
Membership providers
Location security
Configuring our provider
Time for action – create a membership provider
User roles
Role providers
Provider configuration
Summary
11
It's a Generation Thing
It's a Generation Thing
Judging requirements
CodeSmith
nhib-gen
AjGenesis
Visual NHibernate
MyGeneration
Time for action – using MyGeneration
NGen NHibernate Code Generator
NHModeller
Microsoft T4 templates
T4 hbm2net
Summary
12
Odds and Ends
Odds and Ends
Unit of Work and Burrow
How does this relate to NHibernate?
Blog.Net blogging components
maxRequestLength
Converting CSS templates
Time for action – converting a CSS template
XML documentation & GhostDoc
Summary
Pop Quiz Answers
Pop Quiz Answers
Chapter 2 – Database Layout and Design
Chapter 3 – A Touch of Class
Chapter 4 – Data Cartography
Chapter 5 – The Session Procession
Chapter 6 – I'm Logger
Chapter 7 – Configuration
Chapter 8 – Writing Queries
Chapter 9 – Binding Data
Chapter 10 – .NET Security
Chapter 12 – Odds and Ends
Index
Index

Appenders

There are a number of predefined appender types, from file and console appenders to telnet, database, and even e-mail. If there isn't a predefined appender that meets your needs, then you can write your own (as log4net is an extensible framework) and make it work any way that you like! I recently saw an appender that creates entries on the popular microblogging website Twitter.

Defining an appender is as simple as adding it to the configuration and telling log4net to write to it. If we wanted to log to a file, for example, we could use the Rolling File appender. I use the Rolling File appender all the time because you can configure it to rotate logs on a daily or size basis, along with numerous other options.

To define a Rolling File appender that will create a new log every day, we could use the following code:

<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
  <file value="logfile" />
  <appendToFile value="true" />
  <rollingStyle...
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