namespace Dilog_MainApplication.ViewModels; public class MainViewModel : BindableBase { private readonly IDialogService _dialogService; private readonly IRegionManager _regionManager; public MainViewModel(IRegionManager regionManager, IDialogService dialogService) { _regionManager = regionManager; _dialogService = dialogService; OpenCommand = new DelegateCommand(Open); OpenDialogCommand = new DelegateCommand(OpenDialog); } public DelegateCommand OpenCommand { get; private set; } public DelegateCommand OpenDialogCommand { get; private set; } private void OpenDialog(string obj) { var keys = new DialogParameters { { "Value", "Hello" } }; _dialogService.ShowDialog(obj, keys, callback => { if (callback.Result != ButtonResult.OK) return; var value = callback.Parameters.GetValue("Value"); Console.WriteLine(value); }); } private void Open(string obj) { _regionManager.Regions["MainRegion"].RequestNavigate(obj); } }