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="">
             <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;
         }