ASP.NET 4 Unleashed

Creating Custom Parameter Objects

The standard DataSource Parameter objects included in the ASP.NET Framework enable you to represent objects such as query string values, items from Session state, and the values of control properties. If none of the standard Parameter objects satisfy your requirements, you always have the option of creating a custom Parameter object.

You create a custom Parameter object by deriving a new class from the base Parameter class. In this section, we create two custom parameters. The first is a UsernameParameter that automatically represents the current username. Next is a PagePropertyParameter that represents the current value of a property contained in the page.

Creating a Username Parameter

The UsernameParameter ...