Question

In a WPF project, what kind of relationship MainWindow class has with App class? the reason I’m asking is because in a project designed base on MVVM, I do see some tasks which could be handled by MainWindows.xaml.cs or its code behind instead are implemented in App class.

Thanks.

Answer 1

MainWindow is usually connected to the App class through StartupUri in App.xaml.

You could remove the StartupUri in App.xaml and override OnStartup in App.xaml.cs like this

protected override void OnStartup(StartupEventArgs e)
{
    var mainWindow = new MainWindow();
    mainWindow.DataContext = <your datacontext>
    mainWindow.Show();
}