我正在使用
Windows 8音乐应用程序.我正在用当前歌曲/专辑的图像改变页面的背景.我想在更改图像时添加fadeIn / dafeOut动画,但无法弄清楚我该怎么做.
<Grid x:Name="LayoutRoot" Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
<Grid.Resources>
<Storyboard x:Name="fadeOutStoryBoard">
<DoubleAnimation
Storyboard.TargetName="LayoutRoot"
Storyboard.TargetProperty="(LayoutRoot.Background).(ImageBrush.Opacity)"
From="1.0" To="0.0" Duration="0:0:10"/>
</Storyboard>
<Storyboard x:Name="fadeInStoryBoard">
<DoubleAnimation
Storyboard.TargetName="LayoutRoot"
Storyboard.TargetProperty="(LayoutRoot.Background).(ImageBrush.Opacity)"
From="0" To="1.0" Duration="0:0:10"/>
</Storyboard>
</Grid.Resources>
</Grid>
In C# code:
ImageBrush image = new ImageBrush();
image.ImageSource = new BitmapImage(imageUri);
fadeOutStoryBoard.Begin();
MainPage.Current.LayoutRoot.Background = image;
fadeInStoryBoard.Begin();
图像变化很好,但我看不到动画.我尝试将TargetProperty更改为(LayoutRoot.Background).Opacity或(LayoutRoot.Background).(SolidColorBrush.Opacity)但没有运气.如果我将TargetProperty设置为“Opacity”,则动画可以工作,但适用于整个页面而不仅仅是背景.
