harmonia/Harmonia.WinUI/Messaging/WindowsMessageService.cs

using Microsoft.Extensions.DependencyInjection;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using System;
using System.Threading.Tasks;

namespace Harmonia.WinUI.Messaging;

public class WindowsMessageService : IMessageService
{
    private static MainWindow MainWindow => App.ServiceProvider.GetRequiredService<MainWindow>();

    public async Task<bool> ConfirmAsync(string title, string message)
    {
        ContentDialog dialog = new()
        {
            XamlRoot = MainWindow.Content.XamlRoot,
            Style = Application.Current.Resources["DefaultContentDialogStyle"] as Style,
            Title = title,
            Content = message,
            PrimaryButtonText = "Yes",
            CloseButtonText = "No",
            DefaultButton = ContentDialogButton.Primary
        };

        var result = await dialog.ShowAsync();

        return result == ContentDialogResult.Primary;
    }

    public async Task<string> InputTextAsync(string title, string message, string defaultText = "")
    {
        TextBox inputTextBox = new()
        {
            Text = defaultText,
            Margin = new Thickness(0, 10, 0, 0)
        };

        inputTextBox.SelectAll();

        ContentDialog dialog = new()
        {
            XamlRoot = MainWindow.Content.XamlRoot,
            Style = Application.Current.Resources["DefaultContentDialogStyle"] as Style,
            Title = title,
            Content = new StackPanel
            {
                Children =
                {
                    new TextBlock { Text = message },
                    inputTextBox
                }
            },
            PrimaryButtonText = "OK",
            CloseButtonText = "Cancel",
            DefaultButton = ContentDialogButton.Primary
        };

        ContentDialogResult result = await dialog.ShowAsync();

        if (result == ContentDialogResult.Primary)
        {
            return inputTextBox.Text;
        }
        else
        {
            return string.Empty;
        }
    }
}