ASP.NET 4 Unleashed

Using the DataSet Object

The DataSet object represents an in-memory database. A single DataSet can contain one or many DataTable objects. You can define parent/child relationships between the DataTable objects contained in a DataSet.

For example, the page in Listing 19.33 contains a TreeView control. The TreeView displays a list of movie categories and, beneath each movie category, a list of matching movies (see Figure 19.18).

Figure 19.18. Building a TreeView from a DataSet.

Listing 19.33. ShowDataSet.aspx

The TreeView is built programmatically. ...