故事板DoubleAnimation以编程方式

Question

我尝试以编程的方式来执行这个xaml代码。

<Grid.Triggers>
    <EventTrigger RoutedEvent="UIElement.MouseEnter">
        <BeginStoryboard>
            <Storyboard>
                <DoubleAnimation Storyboard.TargetName="tranny" Storyboard.TargetProperty="ScaleX" To="1.2" Duration="0:0:1">
                    <DoubleAnimation.EasingFunction>
                         <ElasticEase Oscillations="1" Springiness="8"/>
                     </DoubleAnimation.EasingFunction>
                 </DoubleAnimation>
                 <DoubleAnimation Storyboard.TargetName="tranny" Storyboard.TargetProperty="ScaleY" To="1.2" Duration="0:0:1">
                     <DoubleAnimation.EasingFunction>
                         <ElasticEase Oscillations="1" Springiness="8" />
                     </DoubleAnimation.EasingFunction>
                 </DoubleAnimation>
            </Storyboard>
        </BeginStoryboard>
    </EventTrigger>
</Grid.Triggers>

它这样做了，但它没有工作，但我不知道为什么，但没有错误，如果有任何错误，我们可以用C#编写这个xaml，以编程方式回答我

如果你有答案，可以帮我添加，如果没有，请不要给-1，这是我写的编程代码。

var secondryGrid = new Grid();
var elasticEase = new ElasticEase();
elasticEase.Oscillations = 1;
elasticEase.Springiness = 8;
var timeSpan = new TimeSpan(0, 0, 0, 100);
var duration = new Duration(timeSpan);
var doubleAnimation = new DoubleAnimation();
doubleAnimation.To = 1.2;
doubleAnimation.Duration = duration;
doubleAnimation.EasingFunction = elasticEase;
var path = new PropertyPath("ScaleX");
var storyBoard = new Storyboard();
Storyboard.SetTargetProperty(doubleAnimation, path);
storyBoard.Children.Add(doubleAnimation);
var beginStoryBoard = new BeginStoryboard();
beginStoryBoard.Storyboard = storyBoard;
elasticEase = new ElasticEase();
elasticEase.Oscillations = 1;
elasticEase.Springiness = 8;
timeSpan = new TimeSpan(0, 0, 0, 100);
duration = new Duration(timeSpan);
doubleAnimation = new DoubleAnimation();
doubleAnimation.To = 1.2;
doubleAnimation.Duration = duration;
doubleAnimation.EasingFunction = elasticEase;
path = new PropertyPath("ScaleY");
Storyboard.SetTargetProperty(doubleAnimation, path);
storyBoard.Children.Add(doubleAnimation);
var gridEventTrigger = new EventTrigger();
gridEventTrigger.RoutedEvent = MouseEnterEvent;
gridEventTrigger.Actions.Add(beginStoryBoard);
secondryGrid.Triggers.Add(gridEventTrigger);

抱歉，我说错话了

Answer 1

在代码中，这样做稍微容易一些。您不需要实例化BeginStoryboard和Storyboard；这些类的设计目的是使XAML中的动画更容易使用。在代码中，可以直接将动画设置为所需的属性。这需要大大减少代码。

示例：

        {
            Grid grid = new Grid();
            grid.MouseEnter += OnGridMouseEnter;
        }

        // An animation instance is created once and can then be reused.
        private static readonly DoubleAnimation xyAnimation = new DoubleAnimation(1.2, TimeSpan.FromSeconds(1))
        {
            EasingFunction = new ElasticEase()
            {
                Oscillations = 1,
                Springiness = 8
            }
        };

        private void OnGridMouseEnter(object sender, MouseEventArgs e)
        {
            tranny.BeginAnimation(ScaleTransform.ScaleXProperty, xyAnimation);
            tranny.BeginAnimation(ScaleTransform.ScaleYProperty, xyAnimation);
        }

P.S.从您的代码中不清楚如何创建tranny转换。

创建我的示例的前提是，有一个包含需要动画的转换的tranny字段。