供参考，我正在使用此MSDN教程：https://msdn.microsoft.com/en-us/library/bb613545(v=vs.100).aspx
我已完成教程，我只想将Click EventTrigger动画从360旋转更改为LinearGradientBrush的简单更改。
根据教程我的GradientStopCollections。当我点击按钮
时，我想在动画中使用其中一个<GradientStopCollection x:Key="MyGlassGradientStopsResource">
<GradientStop Offset="0.2" Color="WhiteSmoke" />
<GradientStop Offset="0.4" Color="Transparent" />
<GradientStop Offset="0.5" Color="WhiteSmoke" />
<GradientStop Offset="0.75" Color="Transparent" />
<GradientStop Offset="0.9" Color="WhiteSmoke" />
<GradientStop Offset="1" Color="Transparent" />
</GradientStopCollection>
<GradientStopCollection x:Key="MyRedGlassGradientStopsResource">
<GradientStop Offset="0.2" Color="IndianRed" />
<GradientStop Offset="0.4" Color="Transparent" />
<GradientStop Offset="0.5" Color="IndianRed" />
<GradientStop Offset="0.75" Color="Transparent" />
<GradientStop Offset="0.9" Color="IndianRed" />
<GradientStop Offset="1" Color="Transparent" />
</GradientStopCollection>
<LinearGradientBrush x:Key="MyGlassBrushResource"
GradientStops="{StaticResource MyGlassGradientStopsResource}"
Opacity="0.75"
StartPoint="0,0"
EndPoint="1,1" />
<LinearGradientBrush x:Key="MyRedGlassBrushResource"
GradientStops="{StaticResource MyRedGlassGradientStopsResource}"
Opacity="0.75"
StartPoint="0,0"
EndPoint="1,1" />
按钮本身。受影响的矩形是glassCube矩形。
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="{StaticResource GrayBlueGradientBrush}" />
<Setter Property="Width" Value="90" />
<Setter Property="Margin" Value="10" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid Width="{TemplateBinding Width}"
Height="{TemplateBinding Height}"
ClipToBounds="True">
<!-- Outer rectangle with rounded corners -->
<Rectangle x:Name="outerRectangle"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Fill="Transparent"
RadiusX="20"
RadiusY="20"
Stroke="{TemplateBinding Background}"
StrokeThickness="5" />
<!-- Inner rectangle with rouded corners -->
<Rectangle x:Name="innerRectangle"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Fill="{TemplateBinding Background}"
RadiusX="20"
RadiusY="20"
Stroke="Transparent"
StrokeThickness="20" />
<!-- Glass Rectangle -->
<Rectangle x:Name="glassCube"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Fill="{StaticResource MyGlassBrushResource}"
Opacity="0"
RadiusX="10"
RadiusY="10"
RenderTransformOrigin="0.5,0.5"
StrokeThickness="2">
<Rectangle.Stroke>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
<LinearGradientBrush.GradientStops>
<GradientStop Offset="0.0" Color="LightBlue" />
<GradientStop Offset="1.0" Color="Gray" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Rectangle.Stroke>
<!--
These tranforms have no effect as they are declared here.
The reason the transforms are included is to be targets for animation
(See later)
-->
<Rectangle.RenderTransform>
<TransformGroup>
<ScaleTransform />
<RotateTransform />
</TransformGroup>
</Rectangle.RenderTransform>
<!-- A BevelBitmapEffect if applied to give the button a "Bevelled" look -->
<Rectangle.BitmapEffect>
<BevelBitmapEffect />
</Rectangle.BitmapEffect>
</Rectangle>
<!-- Present content (text) of the button -->
<DockPanel Name="myContentPresenterDockPanel">
<ContentPresenter x:Name="myContentPresenter"
Margin="20"
Content="{TemplateBinding Content}"
TextBlock.Foreground="Black" />
</DockPanel>
</Grid>
</ControlTemplate>
<!---Snipped the triggers-->
</Setter.Value>
这是我尝试使用的触发器将glassCube矩形的填充从MyGlassGradientStopsResource画笔更改为MyGlassGradientStopsResource画笔。
<EventTrigger RoutedEvent="Button.Click">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<ColorAnimation Duration="0:0:0.5"
Storyboard.TargetName="glassCube"
Storyboard.TargetProperty="Rectangle.Fill"
To="{StaticResource MyRedGlassBrushResource}"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
但是，尝试这样做会给我一个XAMLParseException。错误列表中的错误显示为类型为“System.Windows.Media.LinearGradientBrush”的对象不能应用于期望类型为“System.Nullable .1 [[System.Windows.Media.Color”的属性，PresentationCore，Version = 4.0.0.0，Culture = neutral，PublicKeyToken = 31bf3856ad364e35]]“。
知道我可能做错了什么吗？我试过找出如何在EventTrigger中将Fill更改为不同的LinearGradientBrush，但无济于事。我可能只是在搜索我的搜索或一般搜索。非常感谢任何帮助
答案 0 :(得分：1)
我对你的风格进行了一些修改。另外，我修复了你的故事板。
它现在应该正常工作。
<Style TargetType="{x:Type Button}">
<Setter Property="Background" Value="{StaticResource GrayBlueGradientBrush}" />
<Setter Property="Width" Value="90" />
<Setter Property="Margin" Value="10" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid Width="{TemplateBinding Width}" Height="{TemplateBinding Height}" ClipToBounds="True">
<Rectangle x:Name="outerRectangle" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Fill="Transparent" RadiusX="20" RadiusY="20" Stroke="{TemplateBinding Background}" StrokeThickness="5" />
<Rectangle x:Name="innerRectangle" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Fill="{TemplateBinding Background}" RadiusX="20" RadiusY="20" Stroke="Transparent" StrokeThickness="20" />
<Rectangle x:Name="glassCube" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Opacity="1" RadiusX="10" RadiusY="10" RenderTransformOrigin="0.5,0.5" StrokeThickness="2">
<Rectangle.Style>
<Style TargetType="Rectangle">
<Setter Property="Fill" Value="{StaticResource MyGlassBrushResource}"></Setter>
</Style>
</Rectangle.Style>
<Rectangle.Stroke>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
<LinearGradientBrush.GradientStops>
<GradientStop Offset="0.0" Color="LightBlue" />
<GradientStop Offset="1.0" Color="Gray" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Rectangle.Stroke>
<Rectangle.RenderTransform>
<TransformGroup>
<ScaleTransform />
<RotateTransform />
</TransformGroup>
</Rectangle.RenderTransform>
<!-- A BevelBitmapEffect if applied to give the button a "Bevelled" look -->
<Rectangle.BitmapEffect>
<BevelBitmapEffect />
</Rectangle.BitmapEffect>
</Rectangle>
<!-- Present content (text) of the button -->
<DockPanel Name="myContentPresenterDockPanel" HorizontalAlignment="Center">
<ContentPresenter x:Name="myContentPresenter" Content="{TemplateBinding Content}" TextBlock.Foreground="Black" />
</DockPanel>
</Grid>
<ControlTemplate.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="glassCube" Storyboard.TargetProperty="Fill" Duration="0:0:0.5" BeginTime="0">
<ObjectAnimationUsingKeyFrames.KeyFrames>
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{StaticResource MyRedGlassBrushResource}" />
</ObjectAnimationUsingKeyFrames.KeyFrames>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
注意
您无法将画笔设置为ColorAnimation。请改用ObjectAnimationUsingKeyFrames。如果您仍然需要BrushAnimation，请查看here