WindowのUnloadでPlayerを破棄する

Author: Mr-Ojii

LoopMusicPlayer/ViewModels/MainViewModel.cs

@@ -166,6 +166,15 @@ public MainViewModel()
             return;
     }
 
+    public void OnWindowUnloaded(object? sender, EventArgs e)
+    {
+        if (this.Player is null)
+            return;
+        this.Player.Stop();
+        this.Player.Dispose();
+        this.Player = null;
+    }
+
     private void CheckPropertyChanged(object? sender, PropertyChangedEventArgs e)
     {
         switch (e.PropertyName)

LoopMusicPlayer/Views/MainWindow.axaml.cs

@@ -12,15 +12,22 @@ public MainWindow()
     {
         InitializeComponent();
         this.AddHandler(DragDrop.DropEvent, OnDrop);
-        this.AddHandler(LoadedEvent, OnLoaded);
+        this.AddHandler(LoadedEvent, OnWindowLoaded);
+        this.AddHandler(UnloadedEvent, OnWindowUnloaded);
     }
 
-    private void OnLoaded(object? sender, EventArgs e)
+    private void OnWindowLoaded(object? sender, EventArgs e)
     {
         var viewModel = this.DataContext as MainViewModel;
         if (viewModel is not null)
             viewModel.PropertyChanged += OnChangeTopmost;
     }
+    private void OnWindowUnloaded(object? sender, EventArgs e)
+    {
+        var viewModel = this.DataContext as MainViewModel;
+        if (viewModel is not null)
+            viewModel.OnWindowUnloaded(sender, e);
+    }
 
     private void OnDrop(object? sender, DragEventArgs e) {
         var files = e.Data.GetFiles();