Showing any Window before Main Window causes Left and Right window commands not work properly.

[amithasan]

I have added a splash screen window to a mahapps metro application with a progress ring. The splash screen is shown and closed before the main window is shown using the following code.

protected async override void OnStartup(System.Windows.StartupEventArgs e)
    {
        //Other code

        MainWindow mainWindow = new MainWindow();

        SplashScreen sp = new SplashScreen();
        sp.Show();
        await Task.Delay(3000);
        sp.Close();

        mainWindow.Show();

        //Other code
    }

Splash screen is shown correctly but the main window’s RightWindowCommands and LeftWindowCommands are not working correctly. Maybe styles and data binding of WindowCommands are not working. For example, a button icon on the left is not visible and a button icon on right is visible but data binding is not working.

However, If the main window is showed first then everything works as expected.

Environment

• MahApps.Metro v1.2.4
• Windows 10
• Visual Studio 2015
• .NET Framework 4.5

[punker76]

@amithasan Can you create a short sample for this issue? Thx. By the way, I don't think it's MahApps related.

[amithasan]

SplashScreen.zip

@punker76 This is a short sample for the issue. Thank you.

[punker76]

@amithasan Hi, I fixed the BindingExpression error in pre-release 1.3.0.197. Here is your sample with some minor changes from me.

SplashScreenForLatestPreRelease.zip

[amithasan]

Thank you very much.