Adding a busy label to one of the commands

ReactiveUI.Winforms.Samples.Commands/ViewModels/MainViewModel.cs

@@ -1,4 +1,6 @@
 using System.Reactive.Linq;
+using System.Threading;
+using System.Threading.Tasks;
 using System.Windows;
 
 namespace ReactiveUI.Winforms.Samples.Commands.ViewModels
@@ -8,17 +10,24 @@ public class MainViewModel : ReactiveObject
         private string _applicationTitle;
         private string _withCanExecuteParameter;
 
+        private ObservableAsPropertyHelper<bool> _isBusy;
+        public bool IsBusy => _isBusy.Value;
+
         public MainViewModel()
         {
             // Set properties
             ApplicationTitle = "ReactiveUI Winforms Samples by Asesjix - Commands";
             // Create parameterless command
-            ParameterlessCommand = ReactiveCommand.Create(Parameterless);
+            ParameterlessCommand = ReactiveCommand.CreateFromTask(Parameterless);
+
             // Create command with parameter
             WithParameterCommand = ReactiveCommand.Create<string>(WithParameter);
             // Create command with can execute
-            WithCanExecuteCommand = ReactiveCommand.Create(WithCanExecute, 
+            WithCanExecuteCommand = ReactiveCommand.Create(WithCanExecute,
                 this.WhenAnyValue(vm => vm.WithCanExecuteParameter).Select(s => string.IsNullOrEmpty(s) == false));
+
+            this.WhenAnyObservable(x => x.ParameterlessCommand.IsExecuting)
+                .ToProperty(this, y => y.IsBusy, out _isBusy);
         }
 
         public string ApplicationTitle
@@ -37,9 +46,13 @@ public string WithCanExecuteParameter
         public ReactiveCommand WithParameterCommand { get; }
         public ReactiveCommand WithCanExecuteCommand { get; }
 
-        private void Parameterless()
+        private async Task Parameterless()
         {
-            MessageBox.Show("You pressed the button!", ApplicationTitle, MessageBoxButton.OK);
+            await Task.Run(() =>
+            {
+                Thread.Sleep(3000);
+                MessageBox.Show("You pressed the button!", ApplicationTitle, MessageBoxButton.OK);
+            });
         }
 
         private void WithParameter(string message)

ReactiveUI.Winforms.Samples.Commands/Views/MainView.cs

@@ -11,6 +11,7 @@ public MainView()
 
             this.WhenActivated(d =>
             {
+                d(this.OneWayBind(ViewModel, vm => vm.IsBusy, v => v.busyLabel.Visible));
                 // Bind properties
                 d(this.OneWayBind(ViewModel, vm => vm.ApplicationTitle, v => v.Text));
                 // Bind property for command with can execute