WPF 精修篇 数据触发器

Posted 2021-03-21 lonelyxmas

原文:WPF 精修篇 数据触发器

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~