Use menu providers

The building blocks of the navigation are menu providers and menu items. A menu provider enumerates menu items in a tree according to their menu path. Optimizely Content Management System (CMS) contains a menu provider that looks at [MenuItem] attributes and provides them as menu items.

IMenuProvider

You can extend the standard menu by implementing a menu provider as an attribute alternative. The menu provider returns menu items that are correctly localized. To use a menu provider, implement the IMenuProvider interface, decorate it with the [MenuProvider] attribute, and make it part of a registered shell module.

Add menu items

You can add menu sections and sub-menu items such as menu sections, drop-downs, URLs, and popup menu items. Each menu item defines a path, determining its location in the menu hierarchy. For example, a URL menu item with path /global/cms/myMenu is placed in the CMS section of the menu (which has the path /global/cms).

Types:

• URL Menu Item are links; a click navigates to a specified URL.
• Popup Menu Item [Obsolete] are links opened in a tab.
• Section Menu Item are global menu sections that change the visible menu items.
• Drop-Down Menu Item are designed for the action item area (right-hand side).

Example:

[MenuProvider]
public class CmsMenuProvider: IMenuProvider {
  private readonly ModuleTable _modules;

  public CmsMenuProvider(ModuleTable modules) {
    _modules = modules;
  }

  public IEnumerable<MenuItem> GetMenuItems() {
    var menuItems = new List<MenuItem>();
    menuItems.Add(new UrlMenuItem("Another link to Admin",
      MenuPaths.Global + "/cms" + "/cmsMenuItem",
      Path.Combine(_modules.FindModule("EPiServer.CMS.UI.Admin").ResourceBasePath, "default")) {
      SortIndex = SortIndex.First + 25,
        AuthorizationPolicy = CmsPolicyNames.CmsAdmin
    });

    return menuItems;
  }
}

Localize menu items with a menu provider

A menu provider returns localized menu items.

Permissions with the menu provider

A menu provider can specify AuthorizationPolicy for each menu item, that controls which policy must apply for the menu item to be available. Another alternative is to defer permission filtering to the menu item by setting the IsAvailable delegate to a method that checks access for the user provided with the HttpContext parameter.

Flow of menu items

Menu items flow from the providers into a hierarchical model rendered into HTML.

Configure NavigationOptions

The menu can also be extended by configuring NavigationOptions through code or through appSettings.json as follows:

{
    "EPiServer": {
        "CmsUI": {
            "Navigation": {
                "Items": [
                    {
                        "Text": "My section",
                        "MenuItemType": "Section",
                        "MenuPath": "/global/my",
                        "SortIndex": 300
                    },
                    {
                        "Text": "Edit",
                        "MenuItemType": "Link",
                        "MenuPath": "/global/my/edit",
                        "Url": "/EPiServer/MySecureApp/MyNavigation/Edit",
                        "SortIndex": 100
                    },
                    {
                        "Text": "Admin",
                        "MenuItemType": "Link",
                        "MenuPath": "/global/my/admin",
                        "Url": "/EPiServer/MySecureApp/MyNavigation/Admin",
                        "SortIndex": 200
                    }
                ]
            }
        }
    }
}