OnSelectedIndexChanged
The selectedIndexChanged event occurs when user changes the selected item in RadRadioButtonList.
The event handler receives two parameters:
The instance of the loaded RadRadioButtonList control.
-
An eventArgs parameter of type Telerik.Web.UI.RadioButtonListSelectedIndexChangedEventArgs, containing the following properties and methods:
- get_oldSelectedIndex() - returns the index of the previously selected item.
- get_newSelectedIndex() - returns the index of the currently selected item.
Example 1: Handling RadRadioButtonList OnSelectedIndexChanged event.
<script type="text/javascript">
function OnSelectedIndexChanged(sender, args) {
var oldItem = sender.get_items()[args.get_oldSelectedIndex()];
var newItem = sender.get_items()[args.get_newSelectedIndex()];
alert("You changed from " + oldItem.get_text() + " to " + newItem.get_text() + " language.");
}
</script>
<telerik:RadRadioButtonList runat="server" ID="RadRadioButtonList1">
<ClientEvents OnSelectedIndexChanged="OnSelectedIndexChanged" />
<Items>
<telerik:RadioButtonListItem Text="English" Selected="true" />
<telerik:RadioButtonListItem Text="German" />
<telerik:RadioButtonListItem Text="French" />
</Items>
</telerik:RadRadioButtonList>