public IActionResult GetTree()
    {
        IList<Node> tree = new List<Node>();
        Node GNode = new Node() { text = "A" };
        Node childNode = new Node()
        {
            text = "A tree Node",
            icon = Url.Content("~/images/pdf.gif"),
            a_attr = new { href = "http://www.google.com", target = "_blank", onclick = "window.open(this.href);" }
        };

        GNode.children.Add(childNode);
        tree.Add(GNode);

        return Json(tree);
    }

<div id="Tree" class="tree"></div>
@section Scripts{
<script src="~/lib/jquery/dist/jquery.min.js"></script>
<script src="~/js/jstree.min.js"></script>
<script type="text/javascript">
    $(function () {
        $('#Tree').jstree({
            'plugins': ["search"],
            'core': {
                'data': {
                    url: "@Url.Action("GetTree", "Home")",
                    type: "Post",
                    success: function (data) {
                        alert("success")
                    }
                }
            }
        });
    });
</script>
}