or
var treeDataSource = new kendo.data.HierarchicalDataSource({ transport: { read: { url: settings.GetTreeDataAction, dataType: 'json', type: 'POST' } }, schema: { data: "Model.RootItems", model: { children: "ChildItems", hasChildren: "ChildItems.length > 0" } }});var treeView = $("#treeview").kendoTreeView({ dataSource: treeDataSource, dataTextField: "Item.Nome", loadOnDemand: false}).data("kendoTreeView");treeView.expand(".k-item");