Use .NET Maui WeakReferenceManager to send message from ViewModel to View?

Question

.NET MAUI now has a WeakReferenceManager which works beautifully when sending messages from one ViewModel to another ViewModel. Is it possible to use this when sending a message from a ViewModel to a View?

Answer 1

Thank you to the commenters. The full answer is:

1. Create a class that will serve as the message. Call it anything you like.

public class MyMessage {}

2. In the code-behind page register to receive that message. I opted to combine that with a lambda that does the actual work when the message is received:

WeakReferenceMessenger.Default.Register<MyMessage>(this, async (m,e) =>
{
    // do the work here
});

3. In the XAML add a command (e.g, ShowMyMessageCommand)

4. In the ViewModel send the message in the RelayCommand:

[RelayCommand]
private void ShowMyMessage()
{
    WeakReferenceMessenger.Default.Send(new MyMessage());
}