Prism: Showing a dialog window through two modules

Question

I have two Prism modules. I want one of them register a window and the other one show this window using the "Show Dialog" mode. How can it be done (if it can be done)?

Answer 1

Yes, it can be done. This is rough procedure:

Declare interface for this View in your "Infrastructure" project

public interface IMyDialogWindow
{
}

[Export] class that implements this interface in your module

[Export(typeof(IMyDialogWindow))]
public class MyClassInModuleA : IMyDialogWindow
{
}

[Import] this class in other module and use it for Dialog

[Import]
public IMyDialogWindow PropertyInModuleB

Answer 2

Well. I think I solved it by following this tip. But I don't know if it was the best solution.

I just created a window on my Shell project. This window is the one that will be popped up as a dialog window.

Here is its code:

Popup.xaml:

<Window x:Class="TryERP2.Shell.Views.Popup"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Popup" Height="315" Width="411"
        xmlns:prism="http://www.codeplex.com/prism">
    <Grid>
        <ContentControl x:Name="DialogRegion" Grid.Row="1" prism:RegionManager.RegionName="DialogRegion" />
    </Grid>
</Window>

Popup.xaml.cs:

public partial class Popup : Window
{
    private static Popup popup;

    private Popup(IRegionManager regionManager)
    {
        InitializeComponent();
        RegionManager.SetRegionManager(this, regionManager);
    }

    //Using the singleton pattern
    public static Popup getPopup(IRegionManager regionManager)
    {
        if (popup == null)
            popup = new Popup(regionManager);
        return popup;
    }
}

And, finally, when I want to show the dialog (in a Command which is in a module), I just instantiate it and inform what's the RegionManager:

private void showDialog()
{
    // Acquiring the RegionManager
    var regionManager = ServiceLocator.Current.GetInstance<IRegionManager>();

    // Getting the Popup object
    Popup p = Popup.getPopup(regionManager);

    // Looking for the view I want to show in the dialog
    var x = new Uri("MyView", UriKind.Relative);

    // Changing the view of the DialogRegion (which is within the Popup)
    regionManager.RequestNavigate("DialogRegion", x);

    // Showing the dialog
    p.ShowDialog();
}