WPF 模板绑定父级控件内容
<Style TargetType="Button" x:Key="btn">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Label Content="{Binding Path=Content,RelativeSource={ RelativeSource Mode=TemplatedParent}}"></Label>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>