One common characteristic of user-friendly websites is that they have a consistent, site-wide page layout and navigation scheme. ASP.NET 2.0 introduces two new features that greatly simplify implementing both a site-wide page layout and navigation scheme: master pages and site navigation. Master pages allow for developers to create a site-wide template with designated editable regions. ...

The Data Access Layer (DAL) created in the first tutorial cleanly separates the data access logic from the presentation logic. However, while the DAL cleanly separates the data access details from the presentation layer, it does not enforce any business rules that may apply. For example, for our application we may want to disallow the CategoryID or SupplierID fields of the Products table to be modified when the Discontinued field is set to 1,...

 As web developers, our lives revolve around working with data. We create databases to store the data, code to retrieve and modify it, and web pages to collect and summarize it. This is the first tutorial in a lengthy series that will explore techniques for implementing these common patterns in ASP.NET 2.0. ....