【转】WPF 单选的Checkbox

<RadioButton x:Class="CheckBoxRadioButton.SingleCheckBox"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" Style="{DynamicResource SingleCheckBox}" Click="RadioButton_Click_1" Unchecked="RadioButton_Unchecked_1">
        <RadioButton.Resources>
            <Style x:Key="RadioButtonFocusVisual">
                <Setter Property="Control.Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <Border>
                                <Rectangle 
            Margin="15,0,0,0"
            StrokeThickness="1"
            Stroke="#60000000"
            StrokeDashArray="1 2"/>
                            </Border>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
            <SolidColorBrush x:Key="DisabledForegroundBrush" Color="#888" />
            <SolidColorBrush x:Key="DisabledBorderBrush" Color="#AAA" />
            <SolidColorBrush x:Key="DisabledBackgroundBrush" Color="#EEE" />
            <SolidColorBrush x:Key="Normalborderbrush" Color="#5d7fad" />
            <Style x:Key="SingleCheckBox"  TargetType="{x:Type RadioButton}">
                <Setter Property="GroupName" Value="Single"/>
                <Setter Property="SnapsToDevicePixels" Value="true"/>
                <Setter Property="OverridesDefaultStyle" Value="true"/>
                <Setter Property="Foreground" Value="#071f3b"/>
                <Setter Property="FontFamily" Value="Arial"></Setter>
                <Setter Property="FontSize" Value="14"></Setter>
                <Setter Property="FocusVisualStyle"    Value="{StaticResource RadioButtonFocusVisual}"/>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type RadioButton}">
                            <BulletDecorator Background="Transparent">
                                <BulletDecorator.Bullet>
                                    <Border x:Name="Border"  Width="20" Height="20" CornerRadius="4" Background="#ffffff" BorderThickness="1" BorderBrush="{StaticResource Normalborderbrush}">
                                        <Path Width="14" Height="11" Margin="5,2,0,0" x:Name="CheckMark" SnapsToDevicePixels="False" Stroke="#173e78" StrokeThickness="2" Data="M 0 5 L 3 10 10 0" />
                                    </Border>
                                </BulletDecorator.Bullet>
                                <ContentPresenter 
            Margin="4,0,0,0"
            VerticalAlignment="Center"
            HorizontalAlignment="Left"
            RecognizesAccessKey="True"/>
                            </BulletDecorator>
                            <ControlTemplate.Triggers>
                                <Trigger Property="IsChecked" Value="false">
                                    <Setter TargetName="CheckMark" Property="Visibility" Value="Collapsed"/>
                                </Trigger>
                                <Trigger Property="IsChecked" Value="{x:Null}">
                                    <Setter TargetName="CheckMark" Property="Data" Value="M 0 7 L 7 0" />
                                </Trigger>
                                <Trigger Property="IsMouseOver" Value="true">
                                    <Setter TargetName="Border" Property="Background" Value="#ffffff" />
                                </Trigger>
                                <Trigger Property="IsPressed" Value="true">
                                    <Setter TargetName="Border" Property="Background" Value="#ffffff" />
                                </Trigger>
                                <Trigger Property="IsEnabled" Value="false">
                                    <Setter TargetName="Border" Property="Background" Value="{StaticResource DisabledBackgroundBrush}" />
                                    <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource DisabledBorderBrush}" />
                                    <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </RadioButton.Resources>
    </RadioButton>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace CheckBoxRadioButton
{
    /// <summary>
    /// SingleCheckBox.xaml 的交互逻辑
    /// </summary>
    public partial class SingleCheckBox : RadioButton
    {
        public SingleCheckBox()
        {
            InitializeComponent();
        }

        private bool hasCheck;
        public bool HasCheck
        {
            get { return hasCheck; }
            set { hasCheck = value; }
        }

        private void RadioButton_Click_1(object sender, RoutedEventArgs e)
        {
            if (this.HasCheck == false)
            {
                this.HasCheck = true;
                this.IsChecked = true;
            }
            else
            {
                this.HasCheck = false;
                this.IsChecked = false;
            }
        }

        private void RadioButton_Unchecked_1(object sender, RoutedEventArgs e)
        {
            this.HasCheck = false;
        }
    }
}

<Window x:Class="CheckBoxRadioButton.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
        xmlns:local="clr-namespace:CheckBoxRadioButton"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <StackPanel Orientation="Vertical">
            <local:SingleCheckBox Content="我是一"/>
            <local:SingleCheckBox Content="我是二"/>
        </StackPanel>
    </Grid>
</Window>