Using PRISM, how do I display the view from another module, and access its properties to update its state?

Question

I have two modules, one is a Header module, one is a Items module.

I have a HeaderDetails view, which contains a region which is called 'ItemsSummaryRegion'. This region is registered to populate the region with the view ItemListView from the Items module.

regionManager.RegisterViewWithRegion("ItemsSummaryRegion", typeof(IItemListView));

The issue is, how do I get access to this automatically generated view so that I may set the list of Items it is supposed to display? I want to set this in the ViewModel of the HeaderDetails view.

Does anyone know how you do this? Or can suggest a better way of displaying this data?

Thank you.

Answer 1

If your two modules are so tightly coupled, wouldn't it make more sense to have just one module containing both views, and to set them up with master/detail.

This example shows something similar of what you are trying to achieve: http://www.tanguay.info/web/index.php?pg=codeExamples&id=105

Answer 2

You should use the unityContainer to create things and then call Add and Activate.

    public TaskList(IEventAggregator eventAggregator, 
                    IRegionManager regionManager, 
                    IUnityContainer container)
    {
        _EventAggregator = eventAggregator;
        _RegionManager = regionManager;
        _Container = container;
    }


        IItemListVM vm = _Container.Resolve<IItemListVM>();
        IItemListView view = new IItemListView(vm);

        _RegionManager.Regions["ItemsSummaryRegion"].Add(view);
        _RegionManager.Regions["ItemsSummaryRegion"].Activate(view);

This allows you to call IRegion.Remove later when you want to clear the region. If you just want to register a region with a view, you can do that too, just replace the last couple lines of my logic with the other call to RegisterViewWithRegion:

_RegionManager.RegisterViewWithRegion("ItemsSummaryRegion", 
     (x) => 
     { 
          _Container.Resolve<IItemListView>(); 
     });