WebDataTree1.ClientEvents.NodeChecking = "WebDataTree_NodeChecking"
WebDataTree1.ClientEvents.NodeChecking = "WebDataTree_NodeChecking";
// The client event 'NodeChecking' takes two parameters sender and e // sender is the object which is raising the event // e is the DataTreeNodeEventArgs function WebDataTree_NodeChecking(sender, e) { //Gets the node object that is going to be checked var node = e.getNode(); //Gets the text of the node var nodeText = node.get_text(); if (!confirm("Are you sure you want to check the node '" + nodeText + "'?")) //Cancels the NodeChecking event e.set_cancel(true); }