This Wrox Blox demonstrates how to start using NHibernate in line business applications using ASP.NET and VB.NET. Using NHibernate will speed up your application development by removing the need to build your own Data Access Layer (DAL). In addition, you can focus solely on the business problem instead of the infrastructure concerns. Using a simple demo application as an example, this Wrox Blox shows how easy it is to get started with NHibernate and build your DAL in minutes instead of hours. Readers will also see how the POCO pattern enables you to keep your DAL as unobtrusive as possible as well as being interchangeable for future DAL implementations. You will also see how NHibernate has many enterprise patterns built into it, like the Unit of Work pattern and the Identity Map.

Table of Contents What Is an Object Relational Mapper? 2 Why NHibernate? 2 Part 1: Getting Started with NHibernate 2 A Quick Demo 2 Part 2: The NHibernate Framework 13 Architecture and Core Concepts 13 Mapping Your Entities: Impedance Mismatch 16 Persisting Business Objects 18 Part 3: Using NHibernate 19 Introducing the Project and Laying out the Solution Framework 19 Designing the Domain Model 23 NHibernate Repository Project: Base Class 39 Managing Products 48 Managing Customers 58 NHibernate Repository Project: Refactoring and Session Management 69 Managing Orders 74 The Database A Question of Storage 94 Presentation with the Model View Presenter Pattern 96 User Interface: ASP.NET 103 Part 4: Other NHibernate Bits and Pieces 113 Other Querying Methods 113 Mapping Inheritance 115 What Kind of SQL Is Being Produced? 118 Wrap Up 119 Scott Millett 120.