This example shows how to configure Telerik TreeView for ASP.NET MVC to load its nodes through Ajax requests. The request is performed only once. After that the content is rendered on the page and treeview shows/hides it without performing additional requests.

You can bind the treeview to an ActionMethod that will get requested through AJAX, or to an ASMX / WCF web service, using the DataBinding method.

<%= Html.Telerik().TreeView()
     .Name("TreeView")
     .DataBinding(dataBinding => dataBinding
         .Ajax().Select("_AjaxLoading", "TreeView")
     )
 %>

You can load the whole treeview from scratch, or load the initially visible nodes using the BindTo method, like the root node in this example.