MVVM:将单选按钮绑定到视图模型？开发者社区

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<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300" Loaded="Window_Loaded">
    <StackPanel>
        <RadioButton Content="Button A" IsChecked="{Binding Path=ButtonAIsChecked, Mode=TwoWay}" />
        <RadioButton Content="Button B" IsChecked="{Binding Path=ButtonBIsChecked, Mode=TwoWay}" />
    </StackPanel>
</Window>

using System.Windows;
namespace WpfApplication1
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
        public Window1()
            InitializeComponent();
        private void Window_Loaded(object sender, RoutedEventArgs e)
            this.DataContext = new Window1ViewModel();
}

using System.Windows;
namespace WpfApplication1
    public class Window1ViewModel
        private bool p_ButtonAIsChecked;
        /// <summary>
        /// Summary
        /// </summary>
        public bool ButtonAIsChecked
            get { return p_ButtonAIsChecked; }
                p_ButtonAIsChecked = value;
                MessageBox.Show(string.Format("Button A is checked: {0}", value));
        private bool p_ButtonBIsChecked;
        /// <summary>
        /// Summary
        /// </summary>
        public bool ButtonBIsChecked
            get { return p_ButtonBIsChecked; }
                p_ButtonBIsChecked = value;
                MessageBox.Show(string.Format("Button B is checked: {0}", value));
}

<ListBox ItemsSource="{Binding ...}" SelectedItem="{Binding ...}">
    <ListBox.ItemContainerStyle>
        <Style TargetType="{x:Type ListBoxItem}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ListBoxItem}">
                        <RadioButton Content="{TemplateBinding Content}"
                                     IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsSelected}"/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </ListBox.ItemContainerStyle>
</ListBox>

<Window x:Class="RadioButtonMvvmDemo.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <!-- Resources -->
    <Window.Resources>
        <Style x:Key="RadioButtonList" TargetType="{x:Type ListBox}">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="ItemContainerStyle">
                <Setter.Value>
                    <Style TargetType="{x:Type ListBoxItem}" >
                        <Setter Property="Margin" Value="5" />
                        <Setter Property="Template">
                            <Setter.Value>
                                <ControlTemplate TargetType="{x:Type ListBoxItem}">
                                    <Border BorderThickness="0" Background="Transparent">
                                        <RadioButton 
                                            Focusable="False"
                                            IsHitTestVisible="False"
                                            IsChecked="{TemplateBinding IsSelected}">
                                            <ContentPresenter />
                                        </RadioButton>
                                    </Border>
                                </ControlTemplate>
                            </Setter.Value>
                        </Setter>
                    </Style>
                </Setter.Value>
            </Setter>
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ListBox}">
                        <Border BorderThickness="0" Padding="0" BorderBrush="Transparent" Background="Transparent" Name="Bd" SnapsToDevicePixels="True">
                            <ItemsPresenter SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <!-- Layout -->
        <!-- Note that we use SelectedValue, instead of SelectedItem. This allows us 
        to specify the property to take the value from, using SelectedValuePath. -->
        <ListBox Style="{StaticResource RadioButtonList}" SelectedValuePath="Tag" SelectedValue="{Binding Path=SelectedButton}">
            <ListBoxItem Tag="ButtonA">Button A</ListBoxItem>
            <ListBoxItem Tag="ButtonB">Button B</ListBoxItem>
        </ListBox>
    </Grid>
</Window>

namespace RadioButtonMvvmDemo
    public enum ListButtons {ButtonA, ButtonB}
    public class Window1ViewModel : ViewModelBase
        private ListButtons p_SelectedButton;
        public Window1ViewModel()
            SelectedButton = ListButtons.ButtonB;
        /// <summary>
        /// The button selected by the user.
        /// </summary>
        public ListButtons SelectedButton
            get { return p_SelectedButton; }
                p_SelectedButton = value;
                base.RaisePropertyChangedEvent("SelectedButton");
}

using System.ComponentModel;
namespace RadioButtonMvvmDemo
    public abstract class ViewModelBase : INotifyPropertyChanged
        #region INotifyPropertyChanged Members
        public event PropertyChangedEventHandler PropertyChanged;
        #endregion
        #region Protected Methods
        /// <summary>
        /// Raises the PropertyChanged event.
        /// </summary>
        /// <param name="propertyName">The name of the changed property.</param>
        protected void RaisePropertyChangedEvent(string propertyName)
            if (PropertyChanged != null)
                PropertyChangedEventArgs e = new PropertyChangedEventArgs(propertyName);
                PropertyChanged(this, e);

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