Add and Remove Nodes

The Object Model allows you to dynamically add and remove nodes from the widget. See the Object Model > Tree sample of the MVC Control Explorer live demos at http://demo.componentone.com/ASPNET/MVCExplorer/tree/ObjectModel.

Create an ASP.NET MVC 5 Wijmo application.
In the Solution Explorer, expand the Views | Shared folder and double-click _Layout.cshtml to open the file.

Add the following markup within the <body> tags of the page.

<div>
        <ul id="tree">
            <li><a><span>Folder 1</span></a>
                <ul>
                    <li><a><span>Folder 1.1</span></a></li>
                    <li><a><span>Folder 1.2</span></a></li>
                    <li><a><span>Folder 1.3</span></a></li>
                    <li><a><span>Folder 1.4</span></a></li>
                    <li><a><span>Folder 1.5</span></a></li>
                </ul>
            </li>
        </ul>
    </div>
    <!-- End demo markup -->
    <div class="demo-options">
        <!-- Begin options markup -->
        <div>
            <input id="addNode" type="button" value="Add" />
            at index
            <input id="addIndex" type="text" value="0" />
        </div>
        <div>
            <input id="removeNode" type="button" value="Remove" />
            at index
            <input id="removeIndex" type="text" value="0" />
        </div>    
    </div>

Use the following script to initialize the widget.

<script id="scriptInit" type="text/javascript">
        $(document).ready(function () {
            var tv = $("#tree").wijtree();
            function getNode() {
                return $("#tree").wijtree("findNodeByText", "Folder 1"); ;
            }
            $('#addNode').click(function () {
                var node = getNode();
                if (node != null)
                    node.element.wijtreenode("add", 'New node', parseInt($("#addIndex").val()));
            });
            $('#removeNode').click(function () {
                var node = getNode();
                if (node != null)
                    node.element.wijtreenode("remove", parseInt($("#removeIndex").val()));
            });
        });      
    </script>

Run your program. The wijtree widget should resemble the following image.