Proposal: Modern WinUI MessageDialog/MessageBox

[tom-huntington]

Proposal: Modern WinUI MessageDialog/MessageBox

I'd like a convent way to display simple error messages to the user as per the MessageDialog API:

winrt::Windows::UI::Popups::MessageDialog dialog(L"Hello MessageDialog" );
dialog.ShowAsync();

Requirements:

• Define local, Call show() API
• No Xaml
• Theme matches the WinUI application theme.
• Modal top-level child window

Current Alternatives

Currently to use MessageDialog we must first IInitializeWithWindow as per #4167, which is not an out-of-the-box solution. MessageDialog doesn't have a dark theme, and its old Windows 8 theme clashes with the modern WinUI theme.

ContentDialog requires Xaml which is too heavy weight for simple error messages.

Additional Features:

It would be sensible add additional features (such as those of MessageDialog like the ability to add UICommands) that are compatible with a define local, call show() API.

[JaiganeshKumaran]

@tom-huntington ContentDialog can be used without XAML.

ContentDialog dialog;
dialog.Text(L"Hello MessageDialog");
dialog.XamlRoot(Content().XamlRoot() /* Assuming that you're showing from the window */);
dialog.ShowAsync();

[tom-huntington]

Thanks, that solves my immediate problem of theming issues with MessageDialog.

Still I was expecting a modal top-level child window, and its not as out-of-the-box as MessageDialog.

[zadjii-msft]

You know, I'm definitely interested in this for microsoft/terminal#4134 as well. I'd rather not have to roll my own window just to host a XAML Island that's just a single ContentDialog. I'll do it, but I'd rather just use a built-in component for this.

[michael-hawker]

Related to #2848