As you know the example uses a user control to display the information. The user control has a public property called Data which represents the extracted from the DB information and which is set for a DataSource to the repeater which is in the control.
I also think that it will be useful to know that you have all the examples with their complete code automatically installed on your machine along with the controls. In order to open them you should use the following navigation:
Start/Programs/Telerik/RadControls for ASP.NET AJAX/Open Sample WebSite In Visual Studio.
the Telerik team