Menu service in the Prism CAL app

Question

I'm trying to create a Prism infrastructure (CAL) (this is my first forray in CAL), and it's hard for me to create a service for registering menu items for a region). Here is what I have come up with so far ...

/// <summary> /// Menu item service - allows any module to register menu items with any region /// </summary> public class MenuService : IMenuService { private IUnityContainer m_UnityContainer; private IRegionManager m_RegionManager; private Dictionary<string, IUnityContainer> m_MenuContainers = new Dictionary<string,IUnityContainer>(); /// <summary> /// Injection ctor /// </summary> /// <param name="unityContainer"></param> /// <param name="regionManager"></param> public MenuService(IUnityContainer unityContainer, IRegionManager regionManager) { m_UnityContainer = unityContainer; m_RegionManager = regionManager; } /// <summary> /// Registers a menu item with the service /// </summary> /// <param name="topLevelName"></param> /// <param name="regionIdentity"></param> /// <param name="displayText"></param> public void RegisterMenuItem(string topLevelName, string regionIdentity, string displayText) { IUnityContainer container = GetOrCreateUiIdentityContainer(regionIdentity); if (string.IsNullOrEmpty(topLevelName)) container.RegisterInstance("MENUITEM" + displayText, new MenuItem { Header = displayText} ); else { MenuItem topLevel = container.Resolve<MenuItem>("MENUITEM" + topLevelName); if (topLevel.Header == null) { topLevel = new MenuItem{ Header = topLevelName}; container.RegisterInstance<MenuItem>("MENUITEM" + topLevelName, topLevel); } MenuItem newItem = new MenuItem{Header = displayText}; topLevel.Items.Add(newItem); container.RegisterInstance("MENUITEM" + topLevelName + "_" + displayText, newItem); } } private IUnityContainer GetOrCreateUiIdentityContainer(string regionIdentity) { IUnityContainer container; container = GetUnityContainer(regionIdentity); if (container != null) return container; container = m_UnityContainer.CreateChildContainer(); m_MenuContainers.Add(regionIdentity, container); return container; } private IUnityContainer GetUnityContainer(string regionIdentity) { IUnityContainer container; m_MenuContainers.TryGetValue(regionIdentity, out container); return container; } /// <summary> /// Builds up the menu for a given region /// </summary> /// <param name="regionIdentity"></param> public void BuildMenu(string regionIdentity) { IUnityContainer container; container = GetUnityContainer(regionIdentity); if (container == null) return; IRegion region = m_RegionManager.Regions[regionIdentity]; if (region == null) return; IEnumerable<MenuItem> menuItems = container.ResolveAll<MenuItem>(); foreach (MenuItem item in menuItems) { if (item.Role == MenuItemRole.SubmenuHeader ) region.Add(item); } } } 

Is there a better way to do what I'm trying to do? Hooray, Jason

Answer 1

I have a sample on which you can take a look at what exactly this is doing. Hope this helps you a bit. If you have any specific questions looking at this, let me know! http://dl.getdropbox.com/u/376992/CAGMenus.zip

Hope this helps.