数据触发器 可以使用Binding 来绑定控件 或者数据源 来触发相关动作

举栗子

   <Window.Resources>



        <Style TargetType="{x:Type Label}">



            <Style.Triggers>



                <DataTrigger Binding="{Binding ElementName=red,Path=IsChecked}" Value="True">



                    <Setter Property="Background" Value="Red"></Setter>



                    <Setter Property="Content" Value="Red"/>



                </DataTrigger>



                <DataTrigger Binding="{Binding ElementName=Blue,Path=IsChecked}" Value="True">



                    <Setter Property="Background" Value="Blue"></Setter>



                    <Setter Property="Content" Value="Blue"/>



                </DataTrigger>



                <DataTrigger Binding="{Binding ElementName=Green,Path=IsChecked}" Value="True">



                    <Setter Property="Background" Value="Green"></Setter>



                    <Setter Property="Content" Value="Green"/>



                </DataTrigger>



            </Style.Triggers>



        </Style>



    </Window.Resources>



    <Grid>



    	<Grid.ColumnDefinitions>



    		<ColumnDefinition Width="301*"/>



    		<ColumnDefinition Width="216*"/>



    	</Grid.ColumnDefinitions>



    	<Label FontSize="30" Margin="0"/>



    	<RadioButton  x:Name="red" Content="red" Grid.Column="1" HorizontalAlignment="Left" Height="25.837" Margin="20,30,0,0" VerticalAlignment="Top" Width="104"/>



        <RadioButton x:Name="Blue" Content="Blue" Grid.Column="1" HorizontalAlignment="Left" Height="25.837" Margin="20,91.674,0,0" VerticalAlignment="Top" Width="104"/>



        <RadioButton x:Name="Green"  Content="Green" Grid.Column="1" HorizontalAlignment="Left" Height="25.837" Margin="20,60.837,0,0" VerticalAlignment="Top" Width="104"/>







    </Grid>

通过binding 可以实现很多东西哟~

WPF 精修篇 数据触发器