CS/AspNetCoreCustomItem/Pages/_Layout.cshtml

<!DOCTYPE html>

<html>
<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <title>Web Dashboard Custom Item Gallery</title>

    <link href="css/site.min.css" rel="stylesheet" />

    <script type="text/javascript">
        function onBeforeRender(dashboardControl) {
            dashboardControl.registerExtension(new DevExpress.Dashboard.DashboardPanelExtension(dashboardControl));
            dashboardControl.registerExtension(new SimpleTableCustomItem(dashboardControl));
            dashboardControl.registerExtension(new PolarChartCustomItem(dashboardControl));
            dashboardControl.registerExtension(new ParameterCustomItem(dashboardControl));            
            dashboardControl.registerExtension(new OnlineMapCustomItem(dashboardControl));
            dashboardControl.registerExtension(new WebPageCustomItem(dashboardControl));
            dashboardControl.registerExtension(new GanttCustomItem(dashboardControl));
            dashboardControl.registerExtension(new TreeViewCustomItem(dashboardControl));
            dashboardControl.registerExtension(new FunnelD3CustomItem(dashboardControl));
        }
    </script>
</head>
<body>
    @RenderBody()
    <script src="js/site.min.js"></script>
    <script src="js/OnlineMapItem.js"></script>
    <script src="js/PolarChartItem.js"></script>
    <script src="js/WebPageItem.js"></script>
    <script src="js/SimpleTableItem.js"></script>
    <script src="js/GanttItem.js"></script>
    <script src="js/ParameterItem.js"></script>
    <script src="js/HierarchicalTreeViewItem.js"></script>
    <script src="js/FunnelD3.js"></script>
</body>
</html>