How to create Module Catalog and Reigster Types without opening the MainWindow in Prism-CodePudding

I'm writing a dll for another application and I want to implement my own button in this application which would open a dll which, in turn, would open WPF form.

The question is, when application is being open, I want to do some things for a WPF application which user will open later. For instance, I want to create Module Catalog. In other words, I want to initialize WPF application without opening the Main Window. Due to the opening WPF from another dll, I create an instance of my Application:

    App app = new App();

My App class basically looks like this:

     public partial class App : PrismApplication
     {
        protected override Window CreateShell()
        {
            return Container.Resolve<MainWindow>();
        }
    
        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
    
        }
    
        protected override IModuleCatalog CreateModuleCatalog()
        {
           
        }
    }

So I want CreateModuleCatalog and RegisterTypes methods to be completed, but don't want to show the MainWindow from CreateShell method right now.

Could anyoune tell how can I handle this problem?

CodePudding user response：

If you return null from CreateShell(), there is no window to be displayed.

You can also override OnInitialized(). It's where Prism calls MainWindow?.Show() by default.

Having that said, it's a good practice to always display some kind of splash window as soon as possible.