ObjectDataSource - A powerfull datasource control

A middle tier two-way talking control, thats what you can say about this datasource control. Suitable when you have a requirement of encapsulating your buisness logic in object, hence we say this control supports three tier architecture by providing a way to bind your presentation layer and data tier.

The ObjectDataSource control exposes a TypeName property that specifies an object type (class name) to instantiate for performing data operations. You can bind this control to a DAL (data access layer) or BLL (business logic layer) depending on requirement. More secured and organised is to BLL, thus return data will be stateless.

Nice tutorial for begineers is here : http://quickstart.developerfusion.co.uk/QuickStart/aspnet/doc/ctrlref/data/objectdatasource.aspx