WPF:我能把彩色动画做成一种风格吗?

这是XAML中的一个简单WPF窗口:

<Window x:Class="AnimateTest.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300"
        x:Name="MainWindow"
        Style="{StaticResource TestStyle}">
    <Grid>
    </Grid>
</Window>

请注意,这是一种样式。我们能用这种风格做什么?这就是 App.xaml 它的背景是浅蓝色的

<Application x:Class="AnimateTest.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    StartupUri="Window1.xaml">
    <Application.Resources>
        <Style x:Key="TestStyle">
            <Setter Property="Window.Background" Value="AliceBlue" />
        </Style>
    </Application.Resources>
</Application>

为了变得更复杂,这是一个背景,给它一个蓝色的渐变背景:

<Application x:Class="AnimateTest.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    StartupUri="Window1.xaml">
    <Application.Resources>
        <LinearGradientBrush x:Key="BackgroundBrush"
            EndPoint="0.6,0.6" StartPoint="0,0">
            <GradientStop Color="#FFFFFFFF" Offset="0" />
            <GradientStop Color="#FFD0D0F0" Offset="1" />
        </LinearGradientBrush>
        <Style x:Key="TestStyle">
            <Setter Property="Window.Background" Value="{StaticResource BackgroundBrush}" />
        </Style>
    </Application.Resources>
</Application>

最后一步,我要做的是动画这种颜色。我有

<Application x:Class="AnimateTest.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    StartupUri="Window1.xaml">
    <Application.Resources>
        <LinearGradientBrush x:Key="BackgroundBrush"
            EndPoint="0.6,0.6" StartPoint="0,0">
            <GradientStop Color="#FFFFFFFF" Offset="0" />
            <GradientStop Color="#FFD0D0F0" Offset="1" />
        </LinearGradientBrush>
        <Style x:Key="TestStyle">
            <Setter Property="Window.Background" Value="{StaticResource BackgroundBrush}" />
        </Style>
        <Storyboard x:Key="ThemeAnimation">
            <ColorAnimationUsingKeyFrames
            Storyboard.TargetName="(UIElement)"
            Storyboard.TargetProperty="Background.GradientStops[1].Color"
            Duration="0:0:10"
            RepeatBehavior="Forever">
                <ColorAnimationUsingKeyFrames.KeyFrames>
                    <LinearColorKeyFrame Value="#FFD0D0F0" KeyTime="0:0:0" />
                    <LinearColorKeyFrame Value="#FFF0D0F0" KeyTime="0:0:10" />
                </ColorAnimationUsingKeyFrames.KeyFrames>
            </ColorAnimationUsingKeyFrames>
        </Storyboard>
    </Application.Resources>
</Application>

所以我可以在窗口构造函数中这样做:

        object themeAnimationObject = this.FindResource("ThemeAnimation");
        Storyboard themeAnimation = themeAnimationObject as Storyboard;
        themeAnimation.Begin(this);

但我有一个例外:

(UIElement)' name cannot be found in the name scope of 'AnimateTest.Window1'

我尝试了动画的各种值组合 Storyboard.TargetName 和 Storyboard.TargetProperty 属性,但它们不起作用,我只是在黑暗中摸索。最好的结果是能够将样式、动画和所有内容应用到任何窗口,而不需要任何或使用最少的C代码

更新:以下是基于iTowlson答案的working app.xaml:

<Application x:Class="AnimateTest.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    StartupUri="Window1.xaml">
    <Application.Resources>
        <LinearGradientBrush x:Key="BackgroundBrush"
            EndPoint="0.6,0.6" StartPoint="0,0">
            <GradientStop Color="#FFFFFFFF" Offset="0" />
            <GradientStop Color="#FFD0D0F0" Offset="1" />
        </LinearGradientBrush>
        <Style x:Key="TestStyle" TargetType="FrameworkElement">
            <Setter Property="Window.Background" Value="{StaticResource BackgroundBrush}" />
            <Style.Triggers>
                <EventTrigger RoutedEvent="Loaded">
                    <BeginStoryboard>
                        <Storyboard>
                            <ColorAnimationUsingKeyFrames
                                Storyboard.TargetProperty="Background.GradientStops[1].Color"
                                Duration="0:0:10"
                                RepeatBehavior="Forever"
                                AutoReverse="True">
                                <ColorAnimationUsingKeyFrames.KeyFrames>
                                    <LinearColorKeyFrame Value="#FFD0D0F0" KeyTime="0:0:0" />
                                    <LinearColorKeyFrame Value="#FFF0D0F0" KeyTime="0:0:10" />
                                </ColorAnimationUsingKeyFrames.KeyFrames>
                            </ColorAnimationUsingKeyFrames>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Style.Triggers>
        </Style>
    </Application.Resources>
</Application>