public ActionResult MultiselectFor(MultiselectModel model)
 {
     //posted value is obtained from the model
     model.data = datasource;
     model.val  = model.val;
     return(View(model));
 }
        public ActionResult MultiselectFor()
        {
            MultiselectModel model = new MultiselectModel();

            model.data = datasource;
            return(View(model));
        }