我怎样才能减慢我的 for 循环，以便我可以看到颜色？

Question

我想延迟我的循环，以便它显示我输入的背景颜色。现在，它太快了。

目的是让颜色闪烁以创建迪斯科效果。我使用了Thread.Sleep，但这不起作用。

这是我目前的尝试：

private void Disco(object sender, RoutedEventArgs e)
    {
           for (int n =0; n<=10;n++)
           {
               Background = Brushes.Coral;
               Background = Brushes.AliceBlue;
               Background = Brushes.DarkRed;
               Background = Brushes.Red;
               Background = Brushes.Blue;
               Background = Brushes.Aquamarine;
           }
       }

Answer 1

您可以使用 @Jeroen van Langen 在 cmets 中建议的 async 方法。

在Background 更改之间使用await Task.Delay(time) 将延迟给定time 的更改。

private async void Disco(object sender, RoutedEventArgs e)
{
    Background = Brushes.Coral;
    await Task.Delay(500); // 500 is just an example. You can use any number in milliseconds.
    Background = Brushes.AliceBlue;
    await Task.Delay(500);
    Background = Brushes.DarkRed;
    await Task.Delay(500);
    Background = Brushes.Red;
    await Task.Delay(500);
    Background = Brushes.Blue;
    await Task.Delay(500);
    Background = Brushes.Aquamarine;
    await Task.Delay(500);
    //Set the background back to its original color here.
}

如果您需要您的表单继续“迪斯科”，直到再次按下按钮，您可以将它包装在一个 while 循环中，该循环将一直持续到按下 Button 或 @ 987654329@被选中。

如果你走这条路，我建议你阅读asynchronous programming documentation。这非常有帮助。

Answer 2

此代码适用于 mi，每 5 秒更改一次背景颜色：

公共部分类Form1：表格 { /// /// 控制顺序的颜色列表 /// Color[] colorsList = { Color.Coral, Color.AliceBlue, Color.DarkRed, Color.Red, Color.Blue, Color.Aquamarine }; /// <summary> /// Timer to control the execution time of the color change /// </summary> System.Timers.Timer myTimer = new System.Timers.Timer(); public Form1() { InitializeComponent(); } /// <summary> /// Load or Main of class /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Form1_Load(object sender, EventArgs e) { this.BackColor = colorsList[0]; myTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent); myTimer.Interval = 5000; myTimer.Start(); } /// <summary> /// method that changes the color, executed by the timer /// </summary> /// <param name="source"></param> /// <param name="e"></param> private void OnTimedEvent(object source, ElapsedEventArgs e) { for (int i = 0; i < colorsList.Length; i++) { if (this.BackColor == colorsList[i]) { if (i < colorsList.Length - 1) { this.BackColor = colorsList[i + 1]; break; } else { //return to the first color this.BackColor = colorsList[0]; break; } } } } }