How to bring window to front with wpf and using mvvm

Question

I have a window that essentially runs a timer. When the timer hits 0 I want to bring the window to the front so that it is visible and not hidden behind some other applica

Answer 1

I would go this way:

using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Command;    
using GalaSoft.MvvmLight.Messaging; 

// View

public partial class TestActivateWindow : Window
{
    public TestActivateWindow() {
        InitializeComponent();
        Messenger.Default.Register(this, (msg) => Activate());
    }
}

// View Model

public class MainViewModel: ViewModelBase
{
    ICommand _activateChildWindowCommand;

    public ICommand ActivateChildWindowCommand {
        get {
            return _activateChildWindowCommand?? (_activateChildWindowCommand = new RelayCommand(() => {
                Messenger.Default.Send(new ActivateWindowMsg());
        }));
        }
    }
}

public class ActivateWindowMsg
{
}