HTML
 @(Html.Telerik().TreeView()
        .Name("TreeView")
        .ShowCheckBox(true)
Controller
  [AcceptVerbs(HttpVerbs.Post)]

        public ActionResult CheckBoxSupport(List<TreeViewItem> TreeView_checkedNodes)//命名规则：要和Name一样，否则获取不到值

        {
return View(GetRootEmployees());

        }