c# - 如何为幸运抽奖轮(C#，XAML)添加随机调度程序计时器

我创建了一个幸运的牵引轮，当加载表格时它可以旋转，单击按钮时可以加速和减速旋转。但是，我需要改用调度程序计时器（因为这是幸运的抽奖权，因此我不应该设置固定持续时间。）单击时，它应该在持续时间之间旋转，而当它停止时，系统会提示应提取的奖金从sqltable。
我当前拥有的代码用于加载事件和情节提要。

private void Grid_Loaded(object sender, RoutedEventArgs e)
        {
            myMediaElement.Play();
            var da = new DoubleAnimation(0, 360, new Duration(TimeSpan.FromSeconds(6)));
            var rt = new RotateTransform();
            ellipse.RenderTransform = rt;
            ellipse.RenderTransformOrigin = new Point(0.5, 0.5);
            da.RepeatBehavior = RepeatBehavior.Forever;
            rt.BeginAnimation(RotateTransform.AngleProperty, da);
        }

<Button x:Name="Spin" Width="189" HorizontalAlignment="Left" Margin="593,717,0,38">
                Spin
                <Button.Triggers>
                    <EventTrigger RoutedEvent="Button.Click">
                        <BeginStoryboard>
                            <Storyboard x:Name="Mystoryboard" Completed="Mystoryboardcompleted" FillBehavior="Stop">
                                <DoubleAnimation Storyboard.TargetName="ellipse"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)" AutoReverse="False"
                                                 AccelerationRatio="1" Duration="0:0:4" By="2000" />
                                <DoubleAnimation Storyboard.TargetName="ellipse"
                                                 Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)" AutoReverse="False"
                                                 DecelerationRatio="1" Duration="0:0:4" By="1200" />
                                <ColorAnimationUsingKeyFrames  Storyboard.TargetName="ellipse1"
                                                 Duration="0:0:4"
                                                 Storyboard.TargetProperty="(Ellipse.Fill).(SolidColorBrush.Color)">
                                    <ColorAnimationUsingKeyFrames.KeyFrames>
                                        <DiscreteColorKeyFrame KeyTime="0:0:0" Value="White"/>
                                        <DiscreteColorKeyFrame KeyTime="0:0:1" Value="Green"/>
                                        <DiscreteColorKeyFrame KeyTime="0:0:2" Value="White"/>
                                        <DiscreteColorKeyFrame KeyTime="0:0:3" Value="Green"/>
                                        <DiscreteColorKeyFrame KeyTime="0:0:4" Value="Green"/>
                                    </ColorAnimationUsingKeyFrames.KeyFrames>
                                </ColorAnimationUsingKeyFrames>
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </Button.Triggers>

我已经为调度程序计时器实现了此代码，但是我想在调度程序计时器的持续时间内执行情节提要动作。

private DispatcherTimer _timer = new DispatcherTimer();
        private Random rand = new Random();
        private void dispatcherTimer_Tick(object sender, EventArgs e)
        {
            _timer.Interval = TimeSpan.FromSeconds(rand.Next(5, 10)); // From 5 s to 10 s
            RenderTransformOrigin = new Point(0.5, 0.5);
            DoubleAnimation da = new DoubleAnimation();
            da.From = 0;
            da.To = 360;
            da.Duration = new Duration(TimeSpan.FromSeconds(0.5));
            RotateTransform rt = new RotateTransform();
            ellipse.RenderTransform = rt;
            rt.BeginAnimation(RotateTransform.AngleProperty, da);
        }

最佳答案

假设XAML中有一个Ellipse元素

<Ellipse Width="200" Height="200" RenderTransformOrigin="0.5,0.5" ...>
    <Ellipse.RenderTransform>
        <RotateTransform x:Name="rotateTransform"/>
    </Ellipse.RenderTransform>
</Ellipse>

您可以运行一个动画，例如以每秒1000度的速度随机旋转0至3600度之间的总角度：

var totalRotationAngle = rand.NextDouble() * 3600;

rotateTransform.BeginAnimation(RotateTransform.AngleProperty, new DoubleAnimation
{
    By = totalRotationAngle,
    Duration = TimeSpan.FromMilliseconds(totalRotationAngle)
});

关于c# - 如何为幸运抽奖轮(C#，XAML)添加随机调度程序计时器，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/50672562/