如何在winui3

Question

对话框应显示在父窗口的前面。

当父窗口关闭时，对话框应关闭。

我尝试过的代码。我使用了setparent，但是对话框嵌入了主窗口中，对话框的appwindow变为null。

• public sealed partial class ModelessDialog : Window
  {
      public ModelessDialog(SizeInt32 windowSize, Window _parent)
      {
          this.InitializeComponent();
  
          OverlappedPresenter presenter = (OverlappedPresenter)this.AppWindow.Presenter;
          presenter.IsResizable = true;
          this.AppWindow.SetPresenter(presenter);
          this.AppWindow.IsShownInSwitchers = false;
          this.AppWindow.Resize(windowSize);
  
          IntPtr windowHandle = App.GetWindowHandle(this);
          IntPtr parentHandle = App.GetWindowHandle(_parent);
          SetParent(windowHandle, parentHandle);
      }
  
      public IntPtr GetWindowHandle(in Window _window)
      {
          return WinRT.Interop.WindowNative.GetWindowHandle(_window);
      }
  
      [DllImport("user32.dll", SetLastError = true)]
      public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
  }

您可以使用父母的

claped事件来关闭“无调”窗口。

public partial class ModelessWindow : Window
{
    public ModelessWindow(SizeInt32 size, Window parent) : base()
    {
        parent.Closed += (s, e) => this.Close();

        this.AppWindow.MoveAndResize(
            new RectInt32(
                parent.AppWindow.Position.X,
                parent.AppWindow.Position.Y,
                size.Width,
                size.Height));
    }
}