Template.cshtml

@using Syncfusion.EJ2
@section ControlsSection{
    <div class="control-section">
        <div class="control_wrapper">
            <ejs-treeview id="treedata"  nodeTemplate="@Html.Raw("<div><div class=\"treeviewdiv\"><div style=\"float:left\"><span class=\"treeName\">${name}</span></div>${if(count)}<div style=\"margin-right: 5px; float:right\"><span class=\"treeCount e-badge e-badge-primary\" >${count}</span></div>  ${/if} </div></div>")">
                <e-treeview-fields dataSource="ViewBag.data" id="id" parentId="pid" text="name" hasChildren="hasChild" expanded="expanded" selected="selected"></e-treeview-fields>
            </ejs-treeview>
        </div>
    </div>
}
@section Meta{
    <meta name="description" content="The tree view node can be customized through the template option. In this demo the tree view nodes are templated like an mail system." />
}

@section ActionDescription{
    <div id="action-description">
        <p>This sample demonstrates the template functionalities of the TreeView. Select the root node by clicking on it, or expand the root node and select the customized child node.</p>
    </div>
}

@section Description{
    <div id="description">
        <p>
            The TreeView component has an option to customize the node structure through the nodeTemplate property, so that the tree node can be formed with any custom structure.
        </p>
        <p>
            In this demo, the node is formed with the employee's image, name and designation.
        </p>
        <p>
            More information about Treeview can be found in this
            <a target="_blank"
               href="https://ej2.syncfusion.com/aspnetcore/documentation/treeview/template/">
                documentation section
            </a>.
        </p>
    </div>
}
@*custom code start*@
<style>
    .control_wrapper {
        max-width: 320px;
        margin: auto;
        border: 1px solid #dddddd;
        border-radius: 3px;
    }

    .e-treeview .e-list-text {
        width: 100%;
    }

    .treeCount.e-badge {
        padding: 0.4em;
        vertical-align: text-bottom;
    }

    .material .treeCount.e-badge {
        vertical-align: middle;
    }
</style>
@*custom code end*@