The OnClientContextMenuItemClicking client-side event occurs when the user clicks a menu item, but before the OnClientContextMenuItemClicked event fires. The event is called just prior to postback or url redirection and can be canceled.

The event handler receives parameters:

1. The treeview instance that fired the event.

2. Event arguments with functions:

   • get_menuItem() retrieves a reference to the selected context menu item.

   • get_node() retrieves a reference to the clicked on node.

   • set_cancel() call this function to specify wether the event should be canceled (true) or not (false).

   • get_domEvent() retrieves the DOM event object of the item click.

The example below shows how to cancel the event if the text of the menu item is "Search"

CopyASPX

<script type="text/javascript" language="javascript">
    function ClientContextMenuItemClicking(sender, eventArgs) {
        var node = eventArgs.get_node();
        var item = eventArgs.get_menuItem();

        if ((item.get_text() == "Network Search") && (node.get_text() == "Printers")) {
            eventArgs.set_cancel(true);
        }
    }
</script>

<telerik:RadTreeView ID="RadTreeView1" runat="server" OnClientContextMenuItemClicking="ClientContextMenuItemClicking">
</telerik:RadTreeView>