c# - SplashScreen.Close(Timespan.FromMilliseconds(int)) : Is there an Event dispatched at Timespan Complete?

Question

C# WPF 应用程序

我有一个 SplashScreen通过使用在启动时显示最短时间

Thread.Sleep(int); //int = milliseconds to display splash screen

当达到该休眠时间时，代码恢复并且 SplashScreen 淡出以通过使用关闭

SplashScreen.Close(Timespan.FromMilliseconds(int)); //int = milliseconds fade-out

此时我想暂停一下，等待 SplashScreen 变为 100% 透明并完全关闭，然后继续其他任务，I.E.写入控制台或显示主窗口。

当 (TimeSpan.FromMilliseconds(int)) 完成时是否会触发事件？还有其他建议吗？

namespace StartupSplash
{
    public class SplashScreenStartup
    {
        //IMPORTANT:set image property to Resource and NOT Splash Screen
        private SplashScreen Splash = new SplashScreen("Resources/SplashScreen.png");

        public void SplashScreenStartUp()
        {
            Splash.Show(false, true);
            Thread.Sleep(3000); // Pause code, display splash screen 3 seconds
            Splash.Close(TimeSpan.FromMilliseconds(3000)); // 3 second splash fade-out
            // I want to wait until splash screen fadeOut has completed before
            // this next console output is performed.
            Console.WriteLine("Executes before Splash fadeOut completes.");
        }

    }

Answer 1

也许这段代码可以帮到你。使用后台 worker 类:

BackgroundWorker worker = new BackgroundWorker();
worker.DoWork += (o, ea) => 
{
   // Dispatcher.Invoke commands the dispatcher to do something
   Dispatcher.Invoke((Action)(() => Splash.Close(TimeSpan.FromMilliseconds(3000)));
   // Sleeps this worker but NOT the UI
   Thread.Sleep(3000);
};
worker.RunWorkerCompleted += (o, ea) =>
{
    // Open your mainwindow sample
    MainWindow w = new MainWindow();
    w.Show();
};

//Runs the worker on its own thread
worker.RunWorkerAsync();

这应该开始关闭启动画面，然后休眠，完成后将打开主窗口。实际上，我使用与此非常相似的东西来为我的 WPF 应用程序实现登录和获取信息，同时显示进度条并将其中的文本更新为诸如“连接到服务器”、“登录”和“获取数据”之类的内容。