The RadRotator does not fire a server-side event when its items are scrolled as this functionality is executed entirely on the client. There are two client-side events - OnClientItemShowing
- that are fired respectively before and when a new item is displayed, which happens on a control button click. Both events expose the currently shown item and the client-side API of the control will allow you to retrieve the index as described in the linked help articles.
All the best,
the Telerik team
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