OnClientCheckAllChecked

The OnClientCheckAllChecked client-side event occurs after the user click on the Check All check box. This event is added in 2013 Q3 release (Telerik.Web.UI.dll v.2013.3.1015).

The event handler receives two parameters:

1. The instance of the combobox firing the event.

2. An eventArgs parameter containing the following methods:

• get_domEvent() returns the DOM event object of the drop-down opening.

• get_checked() returns the value of the Check All check box after it is checked.

The example below shows how to get the value of the Check All check box:

ASPNET

<telerik:RadComboBox RenderMode="Lightweight" ID="RadComboBox1" runat="server" OnClientCheckAllChecked="OnClientCheckAllChecked"
	CheckBoxes="true" EnableCheckAllItemsCheckBox="true">
	<items>
	<telerik:RadComboBoxItem Text="Item1" />
	<telerik:RadComboBoxItem Text="Item2" />
	<telerik:RadComboBoxItem Text="Item3" />
</items>
</telerik:RadComboBox>

JavaScript

function OnClientCheckAllChecked(sender, args) {
	if (args.get_checked()) {
		alert('All items are checked.');
	}
	else {
		alert('All items are unchecked.');
	}
}