Accessing Properties in other ViewModels in MVVM Light

Question

I have a main ViewModel containing a List of items which I\'m using in a certain amount of UserControls, which are displayed in a ContentCont

Answer 1

You can actually use the ViewModelLocator. Defaultly is uses the Inversion of Control Container, so even if you create a new instance of the Locator, you will get the same instance of singleton viewmodels from the container.

The Locator class:

static ViewModelLocator()
{
    ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);
    SimpleIoc.Default.Register();
    SimpleIoc.Default.Register();
    SimpleIoc.Default.Register();
}

public ViewModel1 ViewModel1
{
    get
    {
        return ServiceLocator.Current.GetInstance();
    }
}

public ViewModel2 ViewModel2
{
    get
    {
        return ServiceLocator.Current.GetInstance();
    }
}

public ViewModel3 ViewModel3
{
    get
    {
        return ServiceLocator.Current.GetInstance();
    }
}

then from code you can access it as

var vm1 = (new ViewModelLocator ()).ViewModel1;

you get the one and only instance of viewmodel.

from xaml: Resources (defaultly is in Application.Resources in App.xaml)

and DataContext for views (either user controls or windows or whatever)