将 PointAnimation 的 TargetName 设置为资源名称会引发 InvalidOperationException (XAML/Silverlight)
我有一个 Button 控件，我正在为其定义自定义模板。使用一些 Storyboard，我可以使用 DoubleAnimation 成功操作控件属性、命名变换和效果；使用 PointAnimation 时出现了问题，根据 VS，会抛出 InvalidOperationException：无法解析 TargetName OverlayEllipse。
动画已启动在代码中，简单地说：
private void Button_MouseEnter(object sender, MouseEventArgs e)
{
PopUpStoryboard.Begin();
}
相关的 XAML：
<Button ...>
<Button.Resources>
<RadialGradientBrush
x:Name="OverlayBrush" ...>
<RadialGradientBrush.GradientStops>
...
</RadialGradientBrush.GradientStops>
</RadialGradientBrush>
<Storyboard x:Name="PopUpStoryboard">
...
<PointAnimation
Storyboard.TargetName="OverlayEllipse"
Storyboard.TargetProperty="(Shape.Fill)(RadialGradientBrush.GradientOrigin)"
Duration="0:0:.1"
To="0.9,1.2"/>
</Storyboard>
<Button.Resources>
<Button.Style>
<Style TargetType="Button">
...
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid>
...
<Ellipse x:Name="OverlayEllipse" Fill="{StaticResource OverlayBrush}"/>
...
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Button.Style>
</Button>
Ellipse 显然可以解析资源，因为它显示得很好，并且直接从 Storyboard.Begin 调用抛出异常。如何更正我所拥有的内容，以便 Storyboard 能够按名称解析资源？
我曾想过使用 StaticResource 绑定，但是，考虑到它直接引用对象而不是其名称，这是行不通的。我只是尝试使用 StaticResource 绑定设置 Target，而不是 TargetName - 这给了我一个构建错误（很奇怪？）说明：名称空间中的类型“PointAnimation”上不存在属性“Target”http://schemas.microsoft.com/winfx/2006/xaml/presentation'。
谢谢。
I have a Button control for which I'm defining a custom template. Using some Storyboard's I can successfully manipulate control properties, named transforms and effects with DoubleAnimation's; the problem has arisen, when using a PointAnimation, that an InvalidOperationException is thrown as, per VS: Cannot resolve TargetName OverlayEllipse.
The animation is initiated in code, simply:
private void Button_MouseEnter(object sender, MouseEventArgs e)
{
PopUpStoryboard.Begin();
}
And the relevant XAML:
<Button ...>
<Button.Resources>
<RadialGradientBrush
x:Name="OverlayBrush" ...>
<RadialGradientBrush.GradientStops>
...
</RadialGradientBrush.GradientStops>
</RadialGradientBrush>
<Storyboard x:Name="PopUpStoryboard">
...
<PointAnimation
Storyboard.TargetName="OverlayEllipse"
Storyboard.TargetProperty="(Shape.Fill)(RadialGradientBrush.GradientOrigin)"
Duration="0:0:.1"
To="0.9,1.2"/>
</Storyboard>
<Button.Resources>
<Button.Style>
<Style TargetType="Button">
...
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid>
...
<Ellipse x:Name="OverlayEllipse" Fill="{StaticResource OverlayBrush}"/>
...
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Button.Style>
</Button>
The Ellipse can resolve the resource, obviously, as it displays just fine and the exception is thrown directly from the Storyboard.Begin call. How can I correct what I have in order for the Storyboard to be able to resolve to resource by name?
I had thought of using StaticResource binding, however, that won't work considering it refers directly to the object, not its name. I just tried to set the Target, as opposed to TargetName, using the StaticResource binding - this gives me a build error (strangely enough?) stating: The property 'Target' does not exist on the type 'PointAnimation' in the namespace http://schemas.microsoft.com/winfx/2006/xaml/presentation'.
Thanks.
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
仍然以控件（椭圆）上的属性为目标，而不是以资源为目标。添加
(Shape.Fill)以定位GradientOrigin。编辑：这是一个完整的示例按钮样式。
Instead of targeting the resource, still target the property on the control (the Ellipse). Add
(Shape.Fill)to target theGradientOrigin.Edit: Here's a complete sample button style.