Avalonia 常用控件三 Window窗体相关二

1、效果演示

2、在Views中创建WindowDemo.axaml如下图

WindowDemo.axaml代码如下

 WindowDemo.axaml.cs代码如下：

using Avalonia;
using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Markup.Xaml;
namespace AvaloniaStepByStepLearning;
public partial class WindowDemo : Window
{
    public WindowDemo()
    {
        InitializeComponent();
    }
    private void BtnClose_OnClick(object? sender, RoutedEventArgs e)
    {
        Close("返回的数据");
    }
}

3、示例代码步骤

3.1、MainView.axaml添加代码如下

3.2、MainView.axaml.cs添加代码如下

    public Window currenWindow
    {
        get
        {
            return GetParentWindow();
        }
    }
    public Window GetParentWindow()
    {
        if (Avalonia.Application.Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
        {
            return desktop.MainWindow;
        }
        else
        {
            return null;
        }
    }
    private WindowDemo _windowDemo;
    private async void MenuItem_OnClick(object? sender, RoutedEventArgs e)
    {
        MenuItem _menuItem = (MenuItem)sender;
        switch (_menuItem.Name)
        {
            case "MItOpen":
                _windowDemo = new WindowDemo();
                _windowDemo.Show();
                break;
            case "MItClose":
                _windowDemo.Close();
                _windowDemo = null;
                break;
            case "MItHideAndShow":
                if (_windowDemo==null)
                {
                    _windowDemo = new WindowDemo();
                }
                _windowDemo.Hide();
                Thread.Sleep(3000);
                _windowDemo.Show();
                break;
            case "MItOpenDialog":
                if (_windowDemo!=null)
                {
                    _windowDemo.Close();
                    _windowDemo = null;
                }
                _windowDemo = new WindowDemo();
                await _windowDemo.ShowDialog(currenWindow);
                break;
            case "MItOpenGetDialog":
                _windowDemo = new WindowDemo();
                var str=await _windowDemo.ShowDialog(currenWindow);
                btnGetString.Content = str;
                Debug.WriteLine(str);
                break;
            case "MItCloseDialog":
                if (_windowDemo!=null)
                {
                    _windowDemo.Close();
                    _windowDemo = null;
                }
                break;
            default:
                break;
        }
    }

3.3、Avalonia 获取MainWindow.axaml 代码如下

    public Window currenWindow
    {
        get
        {
            return GetParentWindow();
        }
    }
    public Window GetParentWindow()
    {
        if (Avalonia.Application.Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
        {
            return desktop.MainWindow;
        }
        else
        {
            return null;
        }
    }