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The ItemShowing event occurs when an item of the RadRotator control is about to be shown, before the ItemShown event (OnClientItemShown). This event can be canceled.

The event handler receives two parameters:

  1. The RadRotator instance that fired the event.

  2. An eventArgs parameter of type Telerik.Web.UI.RadRotatorCancelEventArgs containing the following properties and methods:

    • get_cancel() - returns a bool value that indicates whether the event was canceled. True means the event is canceled.

    • set_cancel(shouldCancel) - sets a bool value that indicates whether the event will be canceled. Setting true means the event will be canceled.

    • get_item() - returns the client object of the item that was displayed before rotating to a new one.

This event can be used for executing a custom code before a new item of the RadRotator is shown. The example below demonstrates how to cancel the rotation before the RadRotator reaches the item with index 2.

<script type="text/javascript">
    function OnClientItemShowing(sender, eventArgs) {
        var oldItemIndex = eventArgs.get_item().get_index();
        if (oldItemIndex == 1) {
<telerik:RadRotator RenderMode="Lightweight" ID="RadRotator1" runat="server" ScrollDirection="Left" Height="113px"
    ItemHeight="113px" Width="150px" ItemWidth="150px" OnClientItemShowing="OnClientItemShowing">
        <img src=".........." alt="" />
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