Button 模板和样式

     <Style TargetType="{x:Type Button}">
         <Setter Property="FontFamily" Value="Microsoft YaHei"/>
         <Setter Property="FontSize" Value="12"/>
         <Setter Property="BorderThickness"  Value="1"/>
         <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
         <Setter Property="Background" Value="{DynamicResource ButtonBackground}"/>
         <Setter Property="BorderBrush" Value="{DynamicResource ButtonBorder}"/>
         <Setter Property="BorderThickness" Value="1"/>
         <Setter Property="Foreground" Value="{DynamicResource ButtonText}"/>
         <Setter Property="HorizontalContentAlignment" Value="Center"/>
         <Setter Property="VerticalContentAlignment" Value="Center"/>
         <Setter Property="Padding" Value="16,3,16,5"/>
         <Setter Property="Template">
             <Setter.Value>
                 <ControlTemplate TargetType="{x:Type Button}">
                     <Border x:Name="Chrome" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                         <ContentPresenter x:Name="Presenter" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                     </Border>
                     <ControlTemplate.Triggers>
                         <Trigger Property="IsEnabled" Value="False">
                             <Setter Property="Foreground" Value="{DynamicResource ButtonTextDisabled}"/>
                         </Trigger>
                         <Trigger Property="IsMouseOver" Value="True">
                             <Setter Property="Background" Value="{DynamicResource ButtonBackgroundHover}"/>
                             <Setter Property="BorderBrush" Value="{DynamicResource ButtonBorderHover}"/>
                             <Setter Property="Foreground" Value="{DynamicResource ButtonTextHover}"/>
                         </Trigger>
                         <Trigger Property="IsPressed" Value="True">
                             <Setter Property="Background" Value="{DynamicResource ButtonBackgroundPressed}"/>
                             <Setter Property="BorderBrush" Value="{DynamicResource ButtonBorderPressed}"/>
                             <Setter Property="Foreground" Value="{DynamicResource ButtonTextPressed}"/>
                         </Trigger>
                         <Trigger Property="IsFocused" Value="True">
                             <Setter Property="BorderBrush" TargetName="Chrome" Value="{DynamicResource Accent}"/>
                         </Trigger>
                     </ControlTemplate.Triggers>
                 </ControlTemplate>
             </Setter.Value>
         </Setter>
     </Style>

其中

<第5行>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>

这个 Property 设置的是当有焦点时显示的样式，Value 设置为 x:Null 代表不会有任何改变，当然你也可以自己写一个。

应用

 <Button Content="button" Height="23" Width="75"/>
 <Button Content="Disabled" IsEnabled="False" Height="23" Width="75"/>

引用：

https://msdn.microsoft.com/zh-cn/library/ms753328(v=vs.110).aspx