ActualWidth 作为 From WPF 动画的值

发布于 2024-10-20 03:43:45 字数 878 浏览 1 评论 0原文

为什么我不能将 ActualWidth 引用为我可以在代码中使用的值。

XAML：

    <StackPanel>
        <Button x:Name="cmdVibrate" HorizontalAlignment="Center">
            <Button.Triggers>
                <EventTrigger RoutedEvent="Button.MouseEnter">
                    <BeginStoryboard>
                        <Storyboard >
                            <DoubleAnimation From="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualWidth}" By="200" AutoReverse="True" Duration="0:0:1" Storyboard.TargetProperty="Width"></DoubleAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Button.Triggers>
            Mouse over me to shake
        </Button>
    </StackPanel>
</Window>

原文

Why can't I refer to ActualWidth as a value from, which I was able to use in code.

XAML:

    <StackPanel>
        <Button x:Name="cmdVibrate" HorizontalAlignment="Center">
            <Button.Triggers>
                <EventTrigger RoutedEvent="Button.MouseEnter">
                    <BeginStoryboard>
                        <Storyboard >
                            <DoubleAnimation From="{Binding RelativeSource={RelativeSource Mode=Self},Path=ActualWidth}" By="200" AutoReverse="True" Duration="0:0:1" Storyboard.TargetProperty="Width"></DoubleAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Button.Triggers>
            Mouse over me to shake
        </Button>
    </StackPanel>
</Window>

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惟欲睡 2024-10-27 03:43:45

RelativeSource={RelativeSource Mode=Self} 可能会引用 DoubleAnimation （它没有 ActualWidth 属性）。尝试查找祖先 Button 而不是

From="{Binding RelativeSource={RelativeSource AncestorType={x:Type Button}},
               Path=ActualWidth}"

Xaml

<StackPanel>
    <Button x:Name="cmdVibrate" HorizontalAlignment="Center">
        <Button.Triggers>
            <EventTrigger RoutedEvent="Button.MouseEnter">
                <BeginStoryboard>
                    <Storyboard >
                        <DoubleAnimation From="{Binding RelativeSource={RelativeSource AncestorType={x:Type Button}}, Path=ActualWidth}"
                                         By="200"
                                         AutoReverse="True"
                                         Duration="0:0:1"
                                         Storyboard.TargetProperty="Width"></DoubleAnimation>
                    </Storyboard>
                </BeginStoryboard>
            </EventTrigger>
        </Button.Triggers>
        Mouse over me to shake
    </Button>
</StackPanel>

RelativeSource={RelativeSource Mode=Self} will probably be refering to the DoubleAnimation (which doesn't have an ActualWidth property). Try to find the ancestor Button instead

From="{Binding RelativeSource={RelativeSource AncestorType={x:Type Button}},
               Path=ActualWidth}"

Xaml

<StackPanel>
    <Button x:Name="cmdVibrate" HorizontalAlignment="Center">
        <Button.Triggers>
            <EventTrigger RoutedEvent="Button.MouseEnter">
                <BeginStoryboard>
                    <Storyboard >
                        <DoubleAnimation From="{Binding RelativeSource={RelativeSource AncestorType={x:Type Button}}, Path=ActualWidth}"
                                         By="200"
                                         AutoReverse="True"
                                         Duration="0:0:1"
                                         Storyboard.TargetProperty="Width"></DoubleAnimation>
                    </Storyboard>
                </BeginStoryboard>
            </EventTrigger>
        </Button.Triggers>
        Mouse over me to shake
    </Button>
</StackPanel>

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