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我的問題是非常相似的Wpf custom control template - relative font size ...但我想設置字體大小相對於另一資源的一個資源。我實現了Thomas發佈的解決方案，但我無法弄清楚如何將相對源指向另一個資源。WPF資源字體大小 - 相對於其他資源
<my:MathConverter x:Key="MathConverter" />
<Style x:Key="propertyText">
<Setter Property="Control.Foreground" Value="Gray" />
<Setter Property="Control.FontSize" Value="12" />
<Setter Property="Control.Padding" Value="10,2,2,2" />
</Style>
<Style x:Key="headerText">
<!-- I want this to be the same as propertyText +2 -->
<Setter Property="Control.FontSize" Value="FontSize="{Binding
RelativeSource={RelativeSource AncestorType={x:Type Window}},
Path=FontSize,
Converter={StaticResource MathConverter},
ConverterParameter=2}" />
</Style>
這是我遇到的問題。我想它指向而不是propertyText：
RelativeSource={RelativeSource AncestorType={x:Type Window}},
爲了完整起見，這裏是轉換器的代碼：基於馬庫斯·特的答覆
public class MathConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return (double)value + double.Parse(parameter.ToString());
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return null;
}
}
。下面是該解決方案的XAML：
<system:Double x:Key="baseFontSize">12</system:Double>
<my:MathConverter x:Key="MathConverter" />
<Style x:Key="propertyText">
<Setter Property="Control.Foreground" Value="Gray" />
<Setter Property="Control.FontSize" Value="{StaticResource ResourceKey=baseFontSize}" />
<Setter Property="Control.Padding" Value="10,2,2,2" />
</Style>
<Style x:Key="headerText">
<!-- I want this to be the same as propertyText +2 -->
<Setter Property="Control.FontSize"
Value="{Binding Source={StaticResource ResourceKey=baseFontSize},
Converter={StaticResource MathConverter},
ConverterParameter=2}" />
</Style>