OnSelectedIndexChanging

The selectedIndexChanging event occurs when users changes the selected item in RadRadioButtonList. This event can be canceled.

The event handler receives two parameters:

1. The instance of the loaded RadRadioButtonList control.

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

   • get_item() - returns an instance of type Telerik.Web.UI.ButtonListItem (the clicked item).
   • get_cancel() - sets a bool value that indicates whether the event will be canceled. Setting true means the event will be canceled.
   • set_cancel() - returns a bool value that indicates whether the event was canceled. True means the event is canceled.

Example 1: Handling RadRadioButtonList OnSelectedIndexChanging event.

ASP.NET

<script type="text/javascript">
	function OnSelectedIndexChanging(sender, args) {
		var selectedLanguage = args.get_item().get_text();
		var toChange = !confirm("You are about to change to " + selectedLanguage + " language!");
		args.set_cancel(toChange);
	}
</script>

<telerik:RadRadioButtonList runat="server" ID="RadRadioButtonList1">
	<ClientEvents OnSelectedIndexChanging="OnSelectedIndexChanging" />
	<Items>
		<telerik:RadioButtonListItem Text="English" Selected="true" />
		<telerik:RadioButtonListItem Text="German" />
		<telerik:RadioButtonListItem Text="French" />
	</Items>
</telerik:RadRadioButtonList>

See Also

• RadioButtonList Object

• Events Overview

• OnLoad (load)

• OnItemLoad (itemLoad)

• OnItemClicking (itemClicking)

• OnItemClicked (itemClicked)

• OnSelectedIndexChanged (selectedIndexChanged)

• OnItemMouseOver (itemMouseOver)

• OnItemMouseOut (itemMouseOut)