Add message box to show exception

Author: Jack251970

Flow.Launcher/App.xaml.cs

@@ -35,31 +35,64 @@ public partial class App : IDisposable, ISingleInstanceApp
         public App()
         {
             // Initialize settings
-            var storage = new FlowLauncherJsonStorage<Settings>();
-            _settings = storage.Load();
-            _settings.SetStorage(storage);
-            _settings.WMPInstalled = WindowsMediaPlayerHelper.IsWindowsMediaPlayerInstalled();
+            try
+            {
+                var storage = new FlowLauncherJsonStorage<Settings>();
+                _settings = storage.Load();
+                _settings.SetStorage(storage);
+                _settings.WMPInstalled = WindowsMediaPlayerHelper.IsWindowsMediaPlayerInstalled();
+            }
+            catch (Exception e)
+            {
+                ShowErrorMsgBoxAndFailFast("Cannot load setting storage, please check local data directory", e);
+                return;
+            }
 
             // Configure the dependency injection container
-            var host = Host.CreateDefaultBuilder()
-                .UseContentRoot(AppContext.BaseDirectory)
-                .ConfigureServices(services => services
-                    .AddSingleton(_ => _settings)
-                    .AddSingleton(sp => new Updater(sp.GetRequiredService<IPublicAPI>(), Launcher.Properties.Settings.Default.GithubRepo))
-                    .AddSingleton<Portable>()
-                    .AddSingleton<SettingWindowViewModel>()
-                    .AddSingleton<IAlphabet, PinyinAlphabet>()
-                    .AddSingleton<StringMatcher>()
-                    .AddSingleton<Internationalization>()
-                    .AddSingleton<IPublicAPI, PublicAPIInstance>()
-                    .AddSingleton<MainViewModel>()
-                    .AddSingleton<Theme>()
-                ).Build();
-            Ioc.Default.ConfigureServices(host.Services);
+            try
+            {
+                var host = Host.CreateDefaultBuilder()
+                    .UseContentRoot(AppContext.BaseDirectory)
+                    .ConfigureServices(services => services
+                        .AddSingleton(_ => _settings)
+                        .AddSingleton(sp => new Updater(sp.GetRequiredService<IPublicAPI>(), Launcher.Properties.Settings.Default.GithubRepo))
+                        .AddSingleton<Portable>()
+                        .AddSingleton<SettingWindowViewModel>()
+                        .AddSingleton<IAlphabet, PinyinAlphabet>()
+                        .AddSingleton<StringMatcher>()
+                        .AddSingleton<Internationalization>()
+                        .AddSingleton<IPublicAPI, PublicAPIInstance>()
+                        .AddSingleton<MainViewModel>()
+                        .AddSingleton<Theme>()
+                    ).Build();
+                Ioc.Default.ConfigureServices(host.Services);
+            }
+            catch (Exception e)
+            {
+                ShowErrorMsgBoxAndFailFast("Cannot configure dependency injection container, please open new issue in Flow.Launcher", e);
+                return;
+            }
 
             // Initialize the public API and Settings first
-            API = Ioc.Default.GetRequiredService<IPublicAPI>();
-            _settings.Initialize();
+            try
+            {
+                API = Ioc.Default.GetRequiredService<IPublicAPI>();
+                _settings.Initialize();
+            }
+            catch (Exception e)
+            {
+                ShowErrorMsgBoxAndFailFast("Cannot initialize api and settings, please open new issue in Flow.Launcher", e);
+                return;
+            }
+        }
+
+        private static void ShowErrorMsgBoxAndFailFast(string message, Exception e)
+        {
+            // Firstly show users the message
+            MessageBox.Show(e.ToString(), message, MessageBoxButton.OK, MessageBoxImage.Error);
+
+            // Flow cannot construct its App instance, so ensure Flow crashes w/ the exception info.
+            Environment.FailFast(message, e);
         }
 
         [STAThread]
@@ -132,17 +165,17 @@ private void AutoStartup()
         {
             // we try to enable auto-startup on first launch, or reenable if it was removed
             // but the user still has the setting set
-            if (_settings.StartFlowLauncherOnSystemStartup && !Helper.AutoStartup.IsEnabled)
+            if (_settings.StartFlowLauncherOnSystemStartup && !Infrastructure.AutoStartup.IsEnabled)
             {
                 try
                 {
                     if (_settings.UseLogonTaskForStartup)
                     {
-                        Helper.AutoStartup.EnableViaLogonTask();
+                        Infrastructure.AutoStartup.EnableViaLogonTask();
                     }
                     else
                     {
-                        Helper.AutoStartup.EnableViaRegistry();
+                        Infrastructure.AutoStartup.EnableViaRegistry();
                     }
                 }
                 catch (Exception e)

Flow.Launcher/Flow.Launcher.csproj

@@ -91,6 +91,7 @@
     </PackageReference>
     <PackageReference Include="InputSimulator" Version="1.0.4" />
     <!-- Do not upgrade Microsoft.Extensions.DependencyInjection and Microsoft.Extensions.Hosting since we are .Net7.0 -->
+    <!-- TaskScheduler seems to be incompatible with 7.0.x version, so we use 6.0.x -->
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.2" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
     <PackageReference Include="Microsoft.Toolkit.Uwp.Notifications" Version="7.1.3" />