c# - 如何将标签的可见性属性绑定(bind)到多个单选按钮？

Question

Label 的可见性属性可以使用 BoolToVisiblityConverter 连接到 RadioButton 的 IsChecked 属性。但是如何将一个标签的可见性与多个 IsChecked 属性相关联呢？

例如<Label Content="1"></Label>当 RadioButtons 1、3 或 5 的 IsChecked 设置为 true 时应该可见, <Label Content="2"></Label>当 RadioButtons 2 或 4 被选中时。

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition></RowDefinition>
        <RowDefinition></RowDefinition>
    </Grid.RowDefinitions>
    <StackPanel>
        <RadioButton Content="1"></RadioButton>
        <RadioButton Content="2"></RadioButton>
        <RadioButton Content="3"></RadioButton>
        <RadioButton Content="4"></RadioButton>
        <RadioButton Content="5"></RadioButton>    
    </StackPanel>
    <StackPanel Grid.Row="1">
        <Label Content="1"></Label>
        <Label Content="2"></Label>
    </StackPanel>
</Grid>

Answer 1

您可以使用 MultiDataTrigger 完全在 Xaml 中设置值，而无需使用转换器:

<StackPanel>
                <RadioButton x:Name="RadioButton1" Content="1" />
                <RadioButton x:Name="RadioButton2" Content="2" />
                <RadioButton x:Name="RadioButton3" Content="3" />
                <RadioButton x:Name="RadioButton4" Content="4" />
                <RadioButton x:Name="RadioButton5" Content="5" />
</StackPanel>
<StackPanel Grid.Row="1">
                <Label x:Name="FirstLabel" Content="1">
                    <Label.Style>
                        <Style>
                            <Style.Triggers>
                                <MultiDataTrigger>
                                    <MultiDataTrigger.Conditions>
                                        <Condition Binding="{Binding ElementName=RadioButton1, Path=IsChecked}" Value="True" />
                                        <Condition Binding="{Binding ElementName=RadioButton3, Path=IsChecked}" Value="True" />
                                        <Condition Binding="{Binding ElementName=RadioButton5, Path=IsChecked}" Value="True" />
                                    </MultiDataTrigger.Conditions>
                                    <MultiDataTrigger.Setters>
                                        <Setter TargetName="FirstLabel" Property="Visibility" Value="Visible" />
                                    </MultiDataTrigger.Setters>
                                </MultiDataTrigger>
                            </Style.Triggers>
                        </Style>
                    </Label.Style>
                </Label>
            </StackPanel>