using Prism.Commands; using Prism.Mvvm; using Prism.Dialogs; using HelloWorld.Core; namespace HelloWorld.Modules.ModuleA.ViewModels { public class ViewAViewModel : BindableBase { private string _message; public string Message { get { return _message; } set { SetProperty(ref _message, value); } } private DelegateCommand _showDialogCommand; private readonly IDialogService _dialogService; public DelegateCommand ShowDialogCommand => _showDialogCommand ?? (_showDialogCommand = new DelegateCommand(ExecuteShowDialogCommand)); void ExecuteShowDialogCommand() { _dialogService.ShowNotification("Hello There!", r => { if (r.Result == ButtonResult.OK) Message = "OK was clicked"; else Message = "Something else was clicked"; }); } public ViewAViewModel(IDialogService dialogService) { Message = "Hello from ViewA in Module A"; _dialogService = dialogService; } } }