顺序加载窗口

Question

我尝试按顺序加载两个窗口，但第一个无法正确加载。可能是什么原因？我是否用第二个窗口数据阻塞了一些 UI 渲染线程？

private void loadFormWithLoadingScreen<Type>() 
    where Type : Window, new()
{
    //first step:
    LoadingScreen loadingScreen = new LoadingScreen
    {
        Owner = this,
        Topmost = true
    };

    this.Hide();
    loadingScreen.Activate();
    loadingScreen.Show();
    loadingScreen.toCenter(this);

    //second step:
    Type win = new Type
    {
        Owner = this,
        Topmost = true
    };
    win.Unloaded += (_s, _e) =>
    {
        this.Show();
        this.Activate();
    };
    win.Loaded += (_s, _e) =>
    {
        loadingScreen.Close();
    };

    win.toCenter(this);
    win.Show();
}

Answer 1

您的标签表示它在 WPF 中，您可以在 OnStartup 方法中执行所有这些操作。这就是我一直在 WPF 中制作加载屏幕和启动屏幕的方式。

不要忘记在 App.xaml 中更改您的 StartupUri。

protected override void OnStartup(StartupEventArgs e)
{
    var splashScreen = new CoolScreen();
    //any other application work here. CoolScreen class can handle the rest.
    splashScreen.WindowStartupLocation = WindowStartupLocation.CenterScreen;
    splashScreen.Show();

    var yourMainWindow = new MainWindow();
    yourMainWindow.ContentRendered += (sender, args) =>
    {
        //This doesn't have to be in the ContentRendered method
        // but it is necesary because you'll be closing out a window before another is open.
        Application.Current.MainWindow = yourMainWindow;
        Application.Current.ShutdownMode = ShutdownMode.OnLastWindowClose;
        //Accessing the dispatcher of the thread for splashScreen from another
        // thread could be dangerous but, you do need to have the other thread close the splashScreen window out.
        splashScreen.Dispatcher.Invoke(() => splashScreen.Close());
    };
    yourMainWindow.WindowStartupLocation = WindowStartupLocation.Manual;
    yourMainWindow.Show();
}

我可以根据需要对其进行编辑。我做了很多假设。