我尝试使用行为" ChangePropertyAction"但它看起来像 它只以一种方式工作。这是我的代码:
<RadioButton
x:Name="UpRadioButton"
Margin="5"
Content="Up"
>
<i:Interaction.Triggers>
<ei:DataTrigger Binding="{Binding IsChecked, ElementName=UpRadioButton}" Value="True">
<ei:ChangePropertyAction TargetObject="{Binding Mode=OneWay}" PropertyName="SelectedDirection" Value="{x:Static Enums:DirectionEnum.Up}" />
</ei:DataTrigger>
</i:Interaction.Triggers>
</RadioButton>
<RadioButton
x:Name="DownRadioButton"
Margin="5"
Content="Down"
>
<i:Interaction.Triggers>
<ei:DataTrigger Binding="{Binding IsChecked, ElementName=DownRadioButton}" Value="True">
<ei:ChangePropertyAction TargetObject="{Binding Mode=OneWay}" PropertyName="SelectedDirection" Value="{x:Static Enums:DirectionEnum.Down}" />
</ei:DataTrigger>
</i:Interaction.Triggers>
</RadioButton>
<RadioButton
x:Name="LeftRadioButton"
Margin="5"
Content="Left"
>
<i:Interaction.Triggers>
<ei:DataTrigger Binding="{Binding IsChecked, ElementName=LeftRadioButton}" Value="True">
<ei:ChangePropertyAction TargetObject="{Binding Mode=OneWay}" PropertyName="SelectedDirection" Value="{x:Static Enums:DirectionEnum.Left}" />
</ei:DataTrigger>
</i:Interaction.Triggers>
</RadioButton>
<RadioButton
x:Name="RightRadioButton"
Margin="5"
Content="Right"
>
<i:Interaction.Triggers>
<ei:DataTrigger Binding="{Binding IsChecked, ElementName=RightRadioButton}" Value="True">
<ei:ChangePropertyAction TargetObject="{Binding Mode=OneWay}" PropertyName="SelectedDirection" Value="{x:Static Enums:DirectionEnum.Right}" />
</ei:DataTrigger>
</i:Interaction.Triggers>
</RadioButton>
我的视图模型非常简单:MainViewModel.cs
public class MainViewModel : ViewModelBase
{
private DirectionEnum _selectedDirection;
public DirectionEnum SelectedDirection
{
get { return _selectedDirection; }
set
{
if (_selectedDirection != value)
{
_selectedDirection = value;
RaisePropertyChanged();
}
}
}
public MainViewModel()
{
SelectedDirection = DirectionEnum.Up;
}
}
从代码中可以看出,&#34; Up&#34; RadioButton应该已经检查过......
我错过了什么?
答案 0 :(得分:8)
对我来说,一个常见的解决方案是使用包含选择行为的ListBox,并覆盖模板以将项目绘制为RadioButtons。
我的XAML模板通常看起来像这样:
<Style x:Key="RadioButtonListBoxStyle" TargetType="{x:Type ListBox}">
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="KeyboardNavigation.DirectionalNavigation" Value="Cycle" />
<Setter Property="ItemContainerStyle">
<Setter.Value>
<Style TargetType="{x:Type ListBoxItem}" >
<Setter Property="Margin" Value="2, 2, 2, 0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Border Background="Transparent">
<RadioButton
Content="{TemplateBinding ContentPresenter.Content}" VerticalAlignment="Center"
IsChecked="{Binding Path=IsSelected,RelativeSource={RelativeSource TemplatedParent},Mode=TwoWay}"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Setter.Value>
</Setter>
</Style>
样式应用如下:
<ListBox ItemsSource="{Binding Directions}"
SelectedValue="{Binding SelectedDirection}"
Style="{StaticResource RadioButtonListBoxStyle}" />
我发现管理分组RadioButton的选择行为比在代码隐藏或使用转换器中维护大量IsChecked属性更清晰。