UpdaDialogAsync does not update anything in the dialog displayed by DialogService

[KrystofZacek]

🐛 Bug Report

Calling UpdaDialogAsync does not update anything in the dialog displayed by DialogService.

For instance try to change the Title or Content does nothing to the dialog.

💻 Repro or Code Sample

        DialogParameters<SimplePerson> parameters = new()
            {
                Title = $"Hello {simplePerson.Firstname}",
                PrimaryAction = "Yes",
                PrimaryActionEnabled = false,
                SecondaryAction = "No",
                Width = "500px",
                TrapFocus = _trapFocus,
                Modal = _modal,
                PreventScroll = true
            };

        IDialogReference dialog = await DialogService.ShowDialogAsync<SimpleDialog>(simplePerson, parameters);

        await Task.Delay(1000);

        // Let's change some params and data in the dialog
        parameters.Title = "Changed title";
        parameters.PrimaryAction = "Oh yes";
        parameters.Content = new() { Firstname = "John", Lastname = "Brown",Age = 50};

        await DialogService.UpdateDialogAsync<SimplePerson>(dialog.Id, parameters); // nothing changes in the dialog

        await Task.Delay(1000);

🤔 Expected Behavior

😯 Current Behavior

🔦 Context

🌍 Your Environment

[dvoituron]

You have to proceed in the same way as for SplashScreen:

1. Your Content object could contain an UpdateLabels method (see here)
2. So, you can call this method as you want:

var splashScreen = (SplashScreenContent)_dialog.Instance.Content;
splashScreen.UpdateLabels(loadingText: "Second task...");

Example: Open splash screen (async) button - https://www.fluentui-blazor.net/SplashScreen

[dvoituron]

From Discord:

Why so much manual wiring? There already is a method DialogService.UpdateDialogAsync(dialogId, params).
It even invokes StateHasChanged in the dialog. It just DOES NOT pass the Content in params.Content to the dialog.
What is then the purpose of DialogService.UpdateDialogAsync at all?

Me: Indeed, it's probably something we could adapt.