在App.xaml中为应用程序设置FontFamily和FontSize

Question

如何在App.xaml中为应用程序设置FontFamily和FontSize？

Answer 1

我找到了David Padbury从2008年开始的一篇博文,其中介绍了如何从代码中更改它.基本上,您覆盖元数据属性,这些属性将您的更改合并到现有值中.

TextElement.FontFamilyProperty.OverrideMetadata(
typeof(TextElement),
new FrameworkPropertyMetadata(
    new FontFamily("Comic Sans MS")));

TextBlock.FontFamilyProperty.OverrideMetadata(
typeof(TextBlock),
new FrameworkPropertyMetadata(
    new FontFamily("Comic Sans MS")));

还有这个MSDN论坛帖子,它以两种方式解释了如何在XAML中完成它.

1)首先,为Control类定义"全局"样式

 <Style TargetType="{x:Type Control}">
   <Setter Property="FontFamily" Value="Constantia"/>
 </Style>

然后使用该BasedOn属性将其应用于其他控件.

<StackPanel   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
 <StackPanel.Resources>
  <Style TargetType="{x:Type Control}" x:Key="ControlStyle">
     <Setter Property="FontFamily" Value="Constantia"/>
   </Style>

  <Style TargetType="{x:Type Label}" x:Key="LabelStyle" BasedOn="{StaticResource ControlStyle}">
   <Setter Property="FontWeight" Value="Bold" />
  </Style>
        <Style TargetType="{x:Type Button}" x:Key="ButtonStyle" BasedOn="{StaticResource ControlStyle}">
         <Setter Property="Background" Value="Blue"/>
  </Style>
 </StackPanel.Resources>

 <Label Style="{StaticResource LabelStyle}">This is a Label</Label>
 <Button Style="{StaticResource ButtonStyle}">This is a Button</Button>
</StackPanel>

2)您可以设置系统字体:

<FontFamily x:Key="{x:Static SystemFonts.MenuFontFamilyKey}">./#Segoe UI</FontFamily>
<System:Double x:Key="{x:Static SystemFonts.MenuFontSizeKey}">11</System:Double>
<FontWeight x:Key="{x:Static SystemFonts.MenuFontWeightKey}">Normal</FontWeight>

虽然我可能不会推荐这个.