CheckBox多选

前台：

  <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
            <CheckBox Name="cbSampleYes" Content="Yes" />
            <CheckBox Name="cbSampleSure" Content="I'm sure" />
            <TextBlock HorizontalAlignment="Center" Margin="0,20,0,0" FontSize="28">
            <TextBlock.Style>
                <Style TargetType="TextBlock">
                    <Setter Property="Text" Value="Unverified" />
                    <Setter Property="Foreground" Value="Red" />
                    <Style.Triggers>
                        <MultiDataTrigger>
                            <MultiDataTrigger.Conditions>
                                <Condition Binding="{Binding ElementName=cbSampleYes, Path=IsChecked}" Value="True" />
                                <Condition Binding="{Binding ElementName=cbSampleSure, Path=IsChecked}" Value="True" />
                            </MultiDataTrigger.Conditions>
                            
                            <Setter Property="Text" Value="Verified" />
                            <Setter Property="Foreground" Value="Green" />
                        </MultiDataTrigger>
                    </Style.Triggers>
                </Style>
            </TextBlock.Style>
            </TextBlock>
        </StackPanel>

后台：

        private void cbAllFeatures_CheckedChanged(object sender, RoutedEventArgs e)
        {
            bool newVal = (cbAllFeatures.IsChecked == true);
            cbFeatureAbc.IsChecked = newVal;
            cbFeatureXyz.IsChecked = newVal;
            cbFeatureWww.IsChecked = newVal;
        }

        private void cbFeature_CheckedChanged(object sender, RoutedEventArgs e)
        {
            cbAllFeatures.IsChecked = null;
            if ((cbFeatureAbc.IsChecked == true) && (cbFeatureXyz.IsChecked == true) && (cbFeatureWww.IsChecked == true))
                cbAllFeatures.IsChecked = true;
            if ((cbFeatureAbc.IsChecked == false) && (cbFeatureXyz.IsChecked == false) && (cbFeatureWww.IsChecked == false))
                cbAllFeatures.IsChecked = false;
        }