Wpf 使用ColorAnimation更改StackPanel背景色
我正在尝试使用ColorAnimation更改DataTemplate中StackPanel的背景色:Wpf 使用ColorAnimation更改StackPanel背景色,wpf,xaml,background,stackpanel,coloranimation,Wpf,Xaml,Background,Stackpanel,Coloranimation,我正在尝试使用ColorAnimation更改DataTemplate中StackPanel的背景色: <DataTemplate DataType="{x:Type logic:Sensor}"> <StackPanel Name="SensorPanel" MouseDown="SensorPanel_MouseDown"> </StackPanel> <DataTemplate.Trigger
<DataTemplate DataType="{x:Type logic:Sensor}">
<StackPanel Name="SensorPanel" MouseDown="SensorPanel_MouseDown">
</StackPanel>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding Status}" Value="0">
<!--<Setter TargetName="SensorPanel" Property="Background" Value="LawnGreen" />-->
<DataTrigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="SensorPanel"
Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)"
To="LawnGreen" Duration="0:0:0.25" AutoReverse="True" RepeatBehavior="4">
</ColorAnimation>
</Storyboard>
</BeginStoryboard>
</DataTrigger.EnterActions>
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
没有编译时错误。但当我运行此操作时,会引发InvalidOperationException:“'Background'属性未指向路径(0)。(1)”中的DependencyObject。”
什么你的代码对我来说非常有效。我只是做了一些小修改
<DataTemplate DataType="{x:Type Model:Sensor}">
<StackPanel Name="SensorPanel" Background="LightBlue" Width="100" Margin="5">
<TextBlock Text="{Binding Name}"/>
<ToggleButton Margin="2" IsChecked="{Binding IsChecked}" Content="Set status=0" />
</StackPanel>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding Status}" Value="0">
<!--<Setter TargetName="SensorPanel" Property="Background" Value="LawnGreen" />-->
<DataTrigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="SensorPanel"
Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)"
To="LawnGreen" Duration="0:0:0.25" AutoReverse="True" RepeatBehavior="4">
</ColorAnimation>
</Storyboard>
</BeginStoryboard>
</DataTrigger.EnterActions>
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
<ListBox ItemsSource="{Binding Sensors}" />
出于文档目的: 使用
(Panel.Background)。(SolidColorBrush.Color)
有点困难。真正的问题是ColorAnimation
仅适用于Color
属性,而不是Brush
。对我来说,这就是诀窍:
定义面板笔刷
<StackPanel Name="SensorPanel" MouseDown="SensorPanel_MouseDown">
<StackPanel.Background>
<SolidColorBrush Color="White" x:Name="PanelColor"/>
</StackPanel.Background>
</StackPanel>
谢谢,但是它应该永远重复吗?因为确实如此(RepeatBehavior=“4x”将修复此问题。指定一个数字将被解释为时间跨度,因此您所拥有的意味着“04:00:00”或“4小时”。您可能会看到此链接,因为它与您的问题类似。
<ColorAnimation
Storyboard.TargetName="PanelColor"
Storyboard.TargetProperty="Color"
To="LawnGreen" Duration="0:0:0.25" AutoReverse="True" RepeatBehavior="4">