we written onNodeDragging event at client side, while draging the node it will fires automatically with out interruption.
here  we paste the code :
 function onNodeDragging(sender, args) {
            if (args._sourceNodes[0]._attributes._data.IsPrerequisiteQuestion == "True" || args._sourceNodes[0]._attributes._data.IsPrerequisiteAttribute == "True") {
                args.set_cancel(true);
                args.IsValid =false;
                return false;
            }
            else {
                args.set_cancel(false);
            }
        }

Hello,


I am not quite sure about the requirement/problem facing at your side. Could you elaborate about the issue?

More information about the client side event, will be available here: OnClientNodeDragging



-Shinu.