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