UWP - 更改按钮的背景颜色

Question

我想在所有条件下更改按钮的默认背景。但是当我使用

button.Background = new SolidColorBrush(Windows.UI.Colors.Red);

如果按下按钮，我会看到一个红色按钮和灰色按钮。我想我必须改变按钮的样式。但是我怎样才能在风格上设置颜色呢？

<VisualState x:Name="Pressed">
<Storyboard>
    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlBackgroundBaseMediumLowBrush}" />
    </ObjectAnimationUsingKeyFrames>
    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="BorderBrush">
        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
    </ObjectAnimationUsingKeyFrames>
    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightBaseHighBrush}" />
    </ObjectAnimationUsingKeyFrames>
    <PointerDownThemeAnimation Storyboard.TargetName="RootGrid" />
</Storyboard>

Answer 1

你有这个动画：

<ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
    <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlBackgroundBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>

您可以看到，它将 RootGrid 的背景属性设置为按下时{ThemeResource SystemControlBackgroundBaseMediumLowBrush}值。只需将其替换为您的颜色，您就可以开始：

<ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
    <DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>