我正在尝试为项目设置自定义样式，同时维护隐式UWP样式并维护许多隐式UWP样式属性。
在此示例中，我想保留所有默认的UWP按钮样式并设置要引用的键。这使我可以根据此默认值制作自定义样式
默认的UWP样式，其键为DefaultButtonStyle
<Style TargetType="Button" x:Key="DefaultButtonStyle">
<Setter Property="Background" Value="{ThemeResource SystemControlBackgroundBaseLowBrush}" />
<Setter Property="Foreground" Value="{ThemeResource SystemControlForegroundBaseHighBrush}"/>
<Setter Property="BorderBrush" Value="{ThemeResource SystemControlForegroundTransparentBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource ButtonBorderThemeThickness}" />
<Setter Property="Padding" Value="8,4,8,4" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
<Setter Property="FontWeight" Value="Normal" />
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}" />
<Setter Property="UseSystemFocusVisuals" Value="True" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid x:Name="RootGrid" Background="{TemplateBinding Background}">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="RootGrid"/>
</Storyboard>
</VisualState>
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonBackgroundPointerOver}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonBorderBrushPointerOver}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonForegroundPointerOver}"/>
</ObjectAnimationUsingKeyFrames>
<PointerUpThemeAnimation Storyboard.TargetName="RootGrid"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonBackgroundPressed}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonBorderBrushPressed}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonForegroundPressed}"/>
</ObjectAnimationUsingKeyFrames>
<PointerDownThemeAnimation Storyboard.TargetName="RootGrid"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="RootGrid" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonBackgroundDisabled}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonBorderBrushDisabled}"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonForegroundDisabled}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ContentPresenter x:Name="ContentPresenter"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Content="{TemplateBinding Content}"
ContentTransitions="{TemplateBinding ContentTransitions}"
ContentTemplate="{TemplateBinding ContentTemplate}"
Padding="{TemplateBinding Padding}"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
AutomationProperties.AccessibilityView="Raw"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
然后，我想基于此样式创建自定义样式，并且仅更改必要的属性（这使我可以非常轻松地跟踪要更改的属性）
基于DefaultButtonStyle的自定义样式
<Style TargetType="Button" x:Key="CustomButtonStyle" BasedOn="{StaticResource DefaultButtonStyle}">
<Setter Property="Padding" Value="3,3,3,3"/>
<Setter Property="FocusVisualMargin" Value="-3"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid CornerRadius="15">
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
我的问题是我想在模板属性中更改控件模板的属性。但是，正如您期望的那样，在上面的代码中，当我尝试将网格的CornerRadius设置为15时，这是ControlTemplate的唯一属性（即未保留任何默认样式属性）。
猜想我可能在控制模板或网格的某个地方需要另一个键参考。我最好不要完全复制并粘贴控制模板，因为以这种方式进行设置的目的是使我非常清楚要更改的属性。
非常感谢任何帮助。
谢谢
答案 0 :(得分：1)
我的问题是我想在模板属性中更改控件模板的属性。
当您在Template中设置CustomButtonStyle属性时，将覆盖该内容。而且我不知道您为什么要基于默认按钮样式创建新的CustomButtonStyle，您可以直接使用默认样式并修改 RootGrid CornerRadius属性。
要添加CornerRadius属性，可以为按钮添加新的依赖项属性，然后使用CornerRadius标记将RootGrid绑定到 TemplateBinding 。 / p>
<Grid x:Name="RootGrid" Background="{TemplateBinding Background}" CornerRadius="{TemplateBinding MyCornerRadius}">
背后的代码
public sealed class MyCustomButton : Button
{
public MyCustomButton()
{
this.DefaultStyleKey = typeof(MyCustomButton);
}
public CornerRadius MyCornerRadius
{
get { return (CornerRadius)GetValue(MyCornerRadiusProperty); }
set { SetValue(MyCornerRadiusProperty, value); }
}
// Using a DependencyProperty as the backing store for MyCornerRadius. This enables animation, styling, binding, etc...
public static readonly DependencyProperty MyCornerRadiusProperty =
DependencyProperty.Register("MyCornerRadius", typeof(CornerRadius), typeof(MyCustomButton), new PropertyMetadata(0));
}
用法
<local:MyCustomButton Content="Hello" MyCornerRadius="15"/>
有关更多信息，您可以参考Custom dependency properties。