访问由后台线程上的 Caliburn.Micro 应用程序创建的 GUI 窗口？

Question

我有一个 caliburn.micro WPF 应用程序，我正在从 F# 启动它并调用此函数：

            public void LaunchGUI()
            {
                if (_guiWindow == null)
                {
                    var windowThread = new Thread(() =>
                    {
                        try
                        {
                            // Create our context, and install it:
                            SynchronizationContext.SetSynchronizationContext(new DispatcherSynchronizationContext(Dispatcher.CurrentDispatcher));

                            AppBootstrapper.Initialize();
                            var app = new App();
                            app.InitializeComponent();


                            //guiWindow = app.MainWindow;
                            //// When the window closes, shut down the dispatcher
                            //guiWindow.Closed += (s, e) =>
                            //    Dispatcher.CurrentDispatcher.BeginInvokeShutdown(DispatcherPriority.Background);
                            //guiWindow.Closed += (s, e) =>
                            //    guiWindow = null;
                            //guiWindow.WindowState = WindowState.Minimized;
                            //guiWindow.Show();
                            //guiWindow.WindowState = WindowState.Normal;
                            //guiWindow.Activate();
                            // Start the Dispatcher Processing
                            Dispatcher.Run();
                        }
                        catch (Exception e)
                        {
                            LogMessage("error in gui thread: " + e);
                            //guiWindow.Close();
                            //guiWindow = null;
                        }

                    });
                    windowThread.SetApartmentState(ApartmentState.STA);
                    windowThread.IsBackground = true;
                    windowThread.Start();
                }
                else
                {
                    _guiWindow.WindowState = WindowState.Minimized;
                    _guiWindow.Show();
                    _guiWindow.WindowState = WindowState.Normal;
                    _guiWindow.Activate();
                }
            }
        }

问题是我需要对主窗口有一个引用，这样我才能跟踪它是否仍然打开等，但它始终为空（因此是注释代码）。请注意，在运行“普通”MVVM 应用程序并以类似方式对其进行初始化时，这可以正常工作：

    public void ShowGui()
    {
        if (guiWindow == null)
        {
            var windowThread = new Thread(() =>
            {
                try
                {
                    // Create our context, and install it:
                    SynchronizationContext.SetSynchronizationContext(
                        new DispatcherSynchronizationContext(
                            Dispatcher.CurrentDispatcher));

                    guiWindow = new MainWindow();
                    // When the window closes, shut down the dispatcher
                    guiWindow.Closed += (s, e) =>
                        Dispatcher.CurrentDispatcher.BeginInvokeShutdown(DispatcherPriority.Background);
                    guiWindow.Closed += (s, e) =>
                        guiWindow = null;
                    guiWindow.WindowState = WindowState.Minimized;
                    guiWindow.Show();
                    guiWindow.WindowState = WindowState.Normal;
                    guiWindow.Activate();

                    // Start the Dispatcher Processing
                    Dispatcher.Run();
                }
                catch (Exception)
                {
                    try
                    {
                        guiWindow.Close();
                    }
                    catch (Exception)
                    {

                        throw;
                    }
                    guiWindow = null;
                }

            });
            windowThread.SetApartmentState(ApartmentState.STA);
            windowThread.IsBackground = true;
            windowThread.Start();
        }
        else
        {
            guiWindow.WindowState = WindowState.Minimized;
            guiWindow.Show();
            guiWindow.WindowState = WindowState.Normal;
            guiWindow.Activate();
        }
    }

我的问题是如何访问创建的主窗口？

Answer 1

// 你会得到这样的应用程序主窗口：

var _guiWindow = Application.Current.MainWindow as MainWindow;