从单个属性中删除动画。
将动画的 FillBehavior 属性设置为 Stop
通过将 FillBehavior 设置为 Stop,可以告诉动画在其活动期结束时停止影响其目标属性。
<Button
Content="Animate and Then Set Example 2">
<Button.Background>
<SolidColorBrush x:Name="Button2BackgroundBrush"
Color="Red" />
</Button.Background>
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="Button2BackgroundBrush"
Storyboard.TargetProperty="Color"
From="Red" To="Yellow" Duration="0:0:5"
FillBehavior="Stop"
Completed="setButton2BackgroundBrushColor" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
private void setButton2BackgroundBrushColor(object sender, EventArgs e)
// This appears to work:
// the brush changes to blue.
Button2BackgroundBrush.Color = Colors.Blue;
Private Sub setButton2BackgroundBrushColor(ByVal sender As Object, ByVal e As EventArgs)
' This appears to work:
' the brush changes to blue.
Button2BackgroundBrush.Color = Colors.Blue
End Sub
删除整个情节提要
通过使用 RemoveStoryboard 触发器或 Storyboard.Remove 方法,可以告诉情节提要动画停止影响其目标属性。 此方法与设置 FillBehavior 属性的区别在于,可以随时删除情节提要,而 FillBehavior 属性仅在动画活动期结束时才有效。
<Button
Name="Button3"
Content="Animate and Then Set Example 3">
<Button.Background>
<SolidColorBrush x:Name="Button3BackgroundBrush"
Color="Red" />
</Button.Background>
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard Name="MyBeginStoryboard">
<Storyboard x:Name="MyStoryboard">
<ColorAnimation
Storyboard.TargetName="Button3BackgroundBrush"
Storyboard.TargetProperty="Color"
From="Red" To="Yellow" Duration="0:0:5"
FillBehavior="HoldEnd"
Completed="setButton3BackgroundBrushColor" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
private void setButton3BackgroundBrushColor(object sender, EventArgs e)
// This appears to work:
// the brush changes to blue.
MyStoryboard.Remove(Button3);
Button3BackgroundBrush.Color = Colors.Blue;
Private Sub setButton3BackgroundBrushColor(ByVal sender As Object, ByVal e As EventArgs)
' This appears to work:
' the brush changes to blue.
MyStoryboard.Remove(Button3)
Button3BackgroundBrush.Color = Colors.Blue
End Sub
从单个属性中删除动画
另一种阻止动画影响属性的技术是使用正在进行动画处理的对象的 BeginAnimation(DependencyProperty, AnimationTimeline) 方法。 将正在进行动画处理的属性指定为第一个参数,并将 null
指定为第二个参数。
<Button
Name="Button4"
Content="Animate and Then Set Example 4">
<Button.Background>
<SolidColorBrush x:Name="Button4BackgroundBrush"
Color="Red" />
</Button.Background>
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="Button4BackgroundBrush"
Storyboard.TargetProperty="Color"
From="Red" To="Yellow" Duration="0:0:5"
FillBehavior="HoldEnd"
Completed="setButton4BackgroundBrushColor" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Button.Triggers>
</Button>
private void setButton4BackgroundBrushColor(object sender, EventArgs e)
// This appears to work:
// the brush changes to blue.
Button4BackgroundBrush.BeginAnimation(SolidColorBrush.ColorProperty, null);
Button4BackgroundBrush.Color = Colors.Blue;
Private Sub setButton4BackgroundBrushColor(ByVal sender As Object, ByVal e As EventArgs)
' This appears to work:
' the brush changes to blue.
Button4BackgroundBrush.BeginAnimation(SolidColorBrush.ColorProperty, Nothing)
Button4BackgroundBrush.Color = Colors.Blue
End Sub
此技术也适用于非情节提要动画。
FillBehavior
Storyboard.Remove
RemoveStoryboard
属性动画技术概述