Mahapp ShowMessageAsync MvvM

Question

I created the simplest WPF project with a MVVM pattern. How can I call ShowMessageAsync from my viewModel?

 if (DisciplineText!="")
 {
     Disciplines.Add(new Discipline(){ChairID = SelectedChair.ChairID,SemesterID = SelectedSemester.SemesterID,Discipline1 = DisciplineText});
     Context.SaveChanges();
 }
 else
 {
     //  ShowMessageAsync????????
 }

Answer 1

MetroWindow metroWindow = Application.Current.MainWindow as MetroWindow;
metroWindow.MetroDialogOptions.ColorScheme = MetroDialogColorScheme.Accented; // set the theme
await MetroWindow.ShowMessageAsync("Title", "Message");

You need to use :

using MahApps.Metro.Controls;
using MahApps.Metro.Controls.Dialogs;

I hope it help :)