我正在尝试为AppBarButton创建一个样式。我想要做的是改变按下状态下的一些颜色，并使用Path作为内容。 因为我对着色没有任何问题。我想专注于使用Path作为内容部分。而不是做类似的事情：
<AppBarButton Label="PathIcon">
<AppBarButton.Icon>
<PathIcon Data="F1 M 20,20L 24,10L 24,24L 5,24"/>
</AppBarButton.Icon>
</AppBarButton>
我想做点什么：
<AppBarButton Label="PathIcon" Style="{StaticResource MyAppBarButtonStyle1}"/>
所以我编辑了AppBarButton的副本，它让我有这样的东西：
<Style x:Key="MyAppBarButtonStyle" TargetType="AppBarButton">
<Setter Property="Foreground" Value="{ThemeResource AppBarItemForegroundThemeBrush}"/>
<Setter Property="VerticalAlignment" Value="Top"/>
<Setter Property="HorizontalAlignment" Value="Left"/>
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}"/>
<Setter Property="FontWeight" Value="Normal"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="AppBarButton">
<Grid x:Name="RootGrid" Background="Transparent" Width="100">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="ApplicationViewStates">
<VisualState x:Name="FullSize"/>
<VisualState x:Name="Compact">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="TextLabel">
<DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Width" Storyboard.TargetName="RootGrid">
<DiscreteObjectKeyFrame KeyTime="0" Value="60"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="BackgroundEllipse">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarItemPointerOverBackgroundThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="Content">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarItemPointerOverForegroundThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="OutlineEllipse">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarItemForegroundThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Fill" Storyboard.TargetName="BackgroundEllipse">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarItemForegroundThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="Content">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarItemPressedForegroundThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Stroke" Storyboard.TargetName="OutlineEllipse">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarItemDisabledForegroundThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="Content">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarItemDisabledForegroundThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="TextLabel">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppBarItemDisabledForegroundThemeBrush}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="FocusVisualWhite"/>
<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="FocusVisualBlack"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused"/>
<VisualState x:Name="PointerFocused"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<StackPanel Margin="0,14,0,13" VerticalAlignment="Top">
<Grid HorizontalAlignment="Center" Height="40" Margin="0,0,0,5" Width="40">
<Ellipse x:Name="BackgroundEllipse" Fill="{ThemeResource AppBarItemBackgroundThemeBrush}" Height="40" UseLayoutRounding="False" Width="40"/>
<Ellipse x:Name="OutlineEllipse" Height="40" Stroke="{ThemeResource AppBarItemForegroundThemeBrush}" StrokeThickness="2" UseLayoutRounding="False" Width="40"/>
<ContentPresenter x:Name="Content" AutomationProperties.AccessibilityView="Raw" Content="{TemplateBinding Icon}" Foreground="{TemplateBinding Foreground}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
</Grid>
<TextBlock x:Name="TextLabel" Foreground="{ThemeResource AppBarItemForegroundThemeBrush}" FontSize="12" FontFamily="{TemplateBinding FontFamily}" TextAlignment="Center" TextWrapping="Wrap" Text="{TemplateBinding Label}" Width="88"/>
</StackPanel>
<Rectangle x:Name="FocusVisualWhite" IsHitTestVisible="False" Opacity="0" StrokeDashOffset="1.5" StrokeEndLineCap="Square" Stroke="{ThemeResource FocusVisualWhiteStrokeThemeBrush}" StrokeDashArray="1,1"/>
<Rectangle x:Name="FocusVisualBlack" IsHitTestVisible="False" Opacity="0" StrokeDashOffset="0.5" StrokeEndLineCap="Square" Stroke="{ThemeResource FocusVisualBlackStrokeThemeBrush}" StrokeDashArray="1,1"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
然后我更改了上面模板中的所有颜色（在本例中未完成）并执行了此操作：
<Style x:Key="MyAppBarButtonStyle1" TargetType="AppBarButton" BasedOn="{StaticResource LogInAppBarButtonStyle}">
<Setter Property="Content">
<Setter.Value>
<PathIcon Data="F1 M 20,20L 24,10L 24,24L 5,24"/>
</Setter.Value>
</Setter>
</Style>
然而这不起作用。 AppBarButton的内容中没有显示任何内容。此外，您可能已经注意到MyAppBarButtonStyle1正在设置Content属性而不是Icon属性。这是因为如果我尝试设置Icon属性，当我打开包含AppBarButton的页面时，我会得到一个奇怪的异常：
错误HRESULT E_FAIL已从调用COM组件返回。 （??? ...）
另请注意，将Icon属性设置为PathIcon的第一段代码工作正常，尝试将其移动到样式是我失败的地方。
那么有人能指出我正确的方向吗？如何使用Path作为其内容创建AppBarButton样式？
谢谢。
答案 0 :(得分：2)
我很幸运能搞清楚这个。 我正在摆弄地铁工作室。当切换到xaml视图时，有一个名为“winrt appbar”的选项，显示以下内容：
<Style x:Key="PathBasedAppBarButtonStyle" BasedOn="{StaticResource AppBarButtonStyle}" TargetType="ButtonBase">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Path Width="18" Height="18"
Stretch="Uniform" HorizontalAlignment="Center" VerticalAlignment="Center"
Margin="0 0 2 0" RenderTransformOrigin="0.5,0.5"
Fill="{Binding Path=Foreground, RelativeSource={RelativeSource Mode=TemplatedParent}}"
Data="{Binding Path=Content, RelativeSource={RelativeSource Mode=TemplatedParent}}"/>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="Add-NewAppBarButtonStyle" BasedOn="{StaticResource PathBasedAppBarButtonStyle}" TargetType="ButtonBase">
<Setter Property="AutomationProperties.Name" Value="Add-New"/>
<Setter Property="AutomationProperties.AutomationId" Value="Add-NewAppBarButton"/>
<Setter Property="Content" Value="M19.833,0L32.5,0 32.5,19.833999 52.334,19.833999 52.334,32.500999 32.5,32.500999 32.5,52.333 19.833,52.333 19.833,32.500999 0,32.500999 0,19.833999 19.833,19.833999z"/>
</Style>
这正是我想要做的。 PathBasedAppBarButtonStyle使我能够在更改Path的数据的同时基于它创建样式。
我确实略微更改了上面的代码：
1）我将TargetType更改为AppBarButton
2）要获取AppBarButtonStyle，我从C：\ Program Files（x86）\ Windows Kits \ 8.1 \ Include \ winrt \ xaml \ design \ generic.xaml（under）
复制了它所以现在我可以做到
<AppBarButton Label="PathIcon" Style="{StaticResource MyAppBarButtonStyle1}"/>
只要MyAppBarButtonStyle1是基于PathBasedAppBarButtonStyle的样式（如Add-NewAppBarButtonStyle）
希望这有助于像我这样的新人，
此致