Normally the state of RadPanelBar would be lost when navigating between pages unless you programmatically persist it or use the PersistStateInCookie property. This example demonstrates the latter technique - just set the PersistStateInCookie property to true. State restorating occurs before the PreRender event of RadPanelbar. You can access the SelectedItem by subscribing to the PreRender (DataBound if you use declarative datasources) event.