CheckBox多选

前台：

 1   <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
 2             <CheckBox Name="cbSampleYes" Content="Yes" />
 3             <CheckBox Name="cbSampleSure" Content="I'm sure" />
 4             <TextBlock HorizontalAlignment="Center" Margin="0,20,0,0" FontSize="28">
 5             <TextBlock.Style>
 6                 <Style TargetType="TextBlock">
 7                     <Setter Property="Text" Value="Unverified" />
 8                     <Setter Property="Foreground" Value="Red" />
 9                     <Style.Triggers>
10                         <MultiDataTrigger>
11                             <MultiDataTrigger.Conditions>
12                                 <Condition Binding="{Binding ElementName=cbSampleYes, Path=IsChecked}" Value="True" />
13                                 <Condition Binding="{Binding ElementName=cbSampleSure, Path=IsChecked}" Value="True" />
14                             </MultiDataTrigger.Conditions>
15                             
16                             <Setter Property="Text" Value="Verified" />
17                             <Setter Property="Foreground" Value="Green" />
18                         </MultiDataTrigger>
19                     </Style.Triggers>
20                 </Style>
21             </TextBlock.Style>
22             </TextBlock>
23         </StackPanel>

后台：

 1         private void cbAllFeatures_CheckedChanged(object sender, RoutedEventArgs e)
 2         {
 3             bool newVal = (cbAllFeatures.IsChecked == true);
 4             cbFeatureAbc.IsChecked = newVal;
 5             cbFeatureXyz.IsChecked = newVal;
 6             cbFeatureWww.IsChecked = newVal;
 7         }
 8 
 9         private void cbFeature_CheckedChanged(object sender, RoutedEventArgs e)
10         {
11             cbAllFeatures.IsChecked = null;
12             if ((cbFeatureAbc.IsChecked == true) && (cbFeatureXyz.IsChecked == true) && (cbFeatureWww.IsChecked == true))
13                 cbAllFeatures.IsChecked = true;
14             if ((cbFeatureAbc.IsChecked == false) && (cbFeatureXyz.IsChecked == false) && (cbFeatureWww.IsChecked == false))
15                 cbAllFeatures.IsChecked = false;
16         }