WPF：如何制作颜色变化的动画？

发布于 2024-10-09 22:51:06 字数 456 浏览 2 评论 0原文

我有一个网格，一个窗口根元素。我想应用一个动画，它会在 5 秒内将其背景颜色从白色更改为绿色。这就是我所做的：

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    ColorAnimation animation;

    animation = new ColorAnimation();
    animation.From = Colors.White;
    animation.To = Colors.Green;
    animation.Duration = new Duration(TimeSpan.FromSeconds(5));
    rootElement.BeginAnimation(Grid.BackgroundProperty, animation);
}

代码不起作用。一切都没有改变。我哪里出错了？谢谢。

原文

I have a grid, a window root element. I want to apply an animation which would change it's background color from white to green in 5 seconds. Here's what I did:

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    ColorAnimation animation;

    animation = new ColorAnimation();
    animation.From = Colors.White;
    animation.To = Colors.Green;
    animation.Duration = new Duration(TimeSpan.FromSeconds(5));
    rootElement.BeginAnimation(Grid.BackgroundProperty, animation);
}

The code doesn't work. Nothing is changing. Where am I making a mistake? Thanks.

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书间行客 2024-10-16 22:51:06

解决了！

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    SolidColorBrush rootElementBrush;
    ColorAnimation animation;

    rootElementBrush = this.FindResource("RootElementBrush") as SolidColorBrush;

    // Animate the brush 
    animation = new ColorAnimation();
    animation.To = Colors.Green;
    animation.Duration = new Duration(TimeSpan.FromSeconds(5));
    rootElementBrush.BeginAnimation(SolidColorBrush.ColorProperty, animation);
}

这里有一个解释：

我最初的错误是我想通过为其分配颜色来更改 Grid.BackgroundProperty，但它接受画笔......苹果和橙子！因此，我创建了一个 SolidColorBrush 静态资源并将其命名为 rootElementBrush。在 XAML 中，我将 Grid rootElement 的背景属性设置为该静态资源。最后，我修改了动画，因此现在它更改了 SolidColorBrush 的颜色。简单的！

Solved!

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    SolidColorBrush rootElementBrush;
    ColorAnimation animation;

    rootElementBrush = this.FindResource("RootElementBrush") as SolidColorBrush;

    // Animate the brush 
    animation = new ColorAnimation();
    animation.To = Colors.Green;
    animation.Duration = new Duration(TimeSpan.FromSeconds(5));
    rootElementBrush.BeginAnimation(SolidColorBrush.ColorProperty, animation);
}

Here's an explanation:

My initial mistake was that I wanted to change the Grid.BackgroundProperty by assigning colors to it, but it accepts brushes instead... apples and oranges! So, I created a SolidColorBrush static resource and named it rootElementBrush. In XAML, I set Grid rootElement's background property to that static resource. And finally, I modified the animation, so now it changes the color for that SolidColorBrush. Easy!

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胡渣熟男 2024-10-16 22:51:06

尝试一下：

<ColorAnimation
Storyboard.TargetName="PlayButtonArrow" 
Storyboard.TargetProperty="Fill.Color"
From="White"
To="Green"              
Duration="0:0:5.0"
AutoReverse="False"/>

Give this a try:

<ColorAnimation
Storyboard.TargetName="PlayButtonArrow" 
Storyboard.TargetProperty="Fill.Color"
From="White"
To="Green"              
Duration="0:0:5.0"
AutoReverse="False"/>

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顾忌 2024-10-16 22:51:06

您不需要设置StaticResource，只需使用Storyboard。

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    // Animate the brush 
    ColorAnimation animation = new ColorAnimation();
    animation.To = Colors.Green;
    animation.Duration = new Duration(TimeSpan.FromSeconds(5));
    Storyboard.SetTargetProperty(animation, new PropertyPath("(Grid.Background).(SolidColorBrush.Color)", null));
    Storyboard storyboard = new Storyboard();
    storyboard.Children.Add(animation);
    storyboard.Begin(rootElement);
}

You do not need to set the StaticResource, just use the Storyboard.

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    // Animate the brush 
    ColorAnimation animation = new ColorAnimation();
    animation.To = Colors.Green;
    animation.Duration = new Duration(TimeSpan.FromSeconds(5));
    Storyboard.SetTargetProperty(animation, new PropertyPath("(Grid.Background).(SolidColorBrush.Color)", null));
    Storyboard storyboard = new Storyboard();
    storyboard.Children.Add(animation);
    storyboard.Begin(rootElement);
}

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