Wie kommt man Radio-Buttons wie ComboBox in MVVM Muster zu arbeiten?

Question

Im folgenden Code, der Benutzer wählen einen Kunden aus der ComboBox und dieser Kunden Informationen werden im Feld angezeigt.

Jetzt auch ich will Radiobuttons erhalten arbeiten mit der gleichen Funktionalität. Ich habe die Radiobuttons bekam die ObservableCollection von Kunden angezeigt werden, aber wie kann ich die IsChecked arbeiten, dh was ist das Äquivalent von SelectedItem für Radiobuttons

XAML:

<Window.Resources>

    <DataTemplate x:Key="CustomerShowTemplate">
        <Border CornerRadius="5" 
                Background="#eee" 
                Padding="5" 
                HorizontalAlignment="Left">
            <StackPanel>
                <StackPanel Orientation="Horizontal">
                    <TextBlock FontSize="14" FontWeight="Bold" Text="{Binding FirstName}"/>
                    <TextBlock Text=" "/>
                    <TextBlock FontSize="14" FontWeight="Bold" Text="{Binding LastName}"/>
                </StackPanel>
                <TextBlock Text="{Binding Path=HireDate, 
                    StringFormat='Hired on {0:MMM dd, yyyy}'}"/>
            </StackPanel>
        </Border>
    </DataTemplate>

    <DataTemplate x:Key="CustomerComboBoxTemplate">
        <StackPanel Orientation="Horizontal">
            <TextBlock Text="{Binding FirstName}"/>
            <TextBlock Text=" "/>
            <TextBlock Text="{Binding LastName}"/>
        </StackPanel>
    </DataTemplate>

    <DataTemplate x:Key="CustomerRadioButtonTemplate">
        <RadioButton GroupName="CustomerRadioButtonGroup" 
            IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsSelected}">
            <TextBlock Text="{Binding LastName}"/>
        </RadioButton>
    </DataTemplate>

</Window.Resources>

<DockPanel LastChildFill="False" Margin="10">

    <ContentControl 
        DockPanel.Dock="Top"
        Margin="0 0 0 10"
        Content="{Binding SelectedCustomer}" 
        ContentTemplate="{StaticResource CustomerShowTemplate}"/>

    <StackPanel 
        DockPanel.Dock="Top"
        Margin="0 0 0 10">

        <ComboBox 
            ItemsSource="{Binding Customers}"
            ItemTemplate="{StaticResource CustomerComboBoxTemplate}"
            Margin="20"
            HorizontalAlignment="Left"
            SelectedItem="{Binding SelectedCustomer, Mode=TwoWay}"/>

        <ListBox 
            ItemsSource="{Binding Customers}"
            ItemTemplate="{StaticResource CustomerRadioButtonTemplate}" 
            SelectedItem="{Binding SelectedCustomer, Mode=TwoWay}"/>


        <TextBlock Text="{Binding Customers.Count}"/>


        <Button Content="Add Customer" Command="{Binding AddCustomerCommand}"/>


    </StackPanel>

</DockPanel>

Ansichtsmodell:

using System;
using System.Collections.ObjectModel;
using TestSelectedItem234.Models;

namespace TestSelectedItem234.ViewModels
{
    public class MainViewModel : ViewModelBase
    {

        #region ViewModelProperty: Customers
        private ObservableCollection<Customer> _customers = new ObservableCollection<Customer>();
        public ObservableCollection<Customer> Customers
        {
            get
            {
                return _customers;
            }

            set
            {
                _customers = value;
                OnPropertyChanged("Customers");
            }
        }
        #endregion

        #region ViewModelProperty: SelectedCustomer
        private Customer _selectedCustomer;
        public Customer SelectedCustomer
        {
            get
            {
                return _selectedCustomer;
            }

            set
            {
                _selectedCustomer = value;
                OnPropertyChanged("SelectedCustomer");
            }
        }
        #endregion

        #region ViewModelProperty: CustomerIsSelected
        private bool _customerIsSelected;
        public bool CustomerIsSelected
        {
            get
            {
                return _customerIsSelected;
            }

            set
            {
                _customerIsSelected = value;
                OnPropertyChanged("CustomerIsSelected");
            }
        }
        #endregion

        public MainViewModel()
        {
            LoadCustomers();

            CustomerIsSelected = false;
        }

        private void LoadCustomers()
        {
            _customers.Add(new Customer { FirstName = "Jim", LastName = "Smith", HireDate = DateTime.Parse("2007-12-31") });
            _customers.Add(new Customer { FirstName = "Jack", LastName = "Taylor", HireDate = DateTime.Parse("2005-12-31") });
            _customers.Add(new Customer { FirstName = "Jane", LastName = "Smith", HireDate = DateTime.Parse("2005-06-30") });
            _customers.Add(new Customer { FirstName = "Alice", LastName = "Jones", HireDate = DateTime.Parse("2005-08-23") });
            _customers.Add(new Customer { FirstName = "Mary", LastName = "Ashton", HireDate = DateTime.Parse("2005-12-22") });
            _customers.Add(new Customer { FirstName = "Joe", LastName = "Jones", HireDate = DateTime.Parse("2005-11-22") });
            _customers.Add(new Customer { FirstName = "Henry", LastName = "Smith", HireDate = DateTime.Parse("2005-12-11") });
            _customers.Add(new Customer { FirstName = "Allison", LastName = "Rodrigez", HireDate = DateTime.Parse("2004-12-14") });
            _customers.Add(new Customer { FirstName = "Angela", LastName = "Thompson", HireDate = DateTime.Parse("2003-03-14") });
            _customers.Add(new Customer { FirstName = "Shawna", LastName = "Quaker", HireDate = DateTime.Parse("2005-12-14") });

            SelectedCustomer = _customers[0];
        }

    }
}

Update:

Ich habe auch versucht, diese von Thomas, es gibt aber noch keine Verbindung IsChecked mit IsSelected:

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

Answer 1

Items keine SelectedItem Eigenschaft haben, sollten Sie eine List-Box verwenden, anstatt

Dieses Beispiel funktioniert:

<Page
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:sys="clr-namespace:System;assembly=mscorlib">
  <Page.Resources>
    <x:Array x:Key="stringList" Type="sys:String">
      <sys:String>Hello</sys:String>
      <sys:String>World</sys:String>
      <sys:String>!</sys:String>
    </x:Array>
  </Page.Resources>
  <Grid>
    <ListBox ItemsSource="{StaticResource stringList}">
      <ListBox.ItemContainerStyle>
        <Style TargetType="{x:Type ListBoxItem}">
          <Setter Property="Template">
            <Setter.Value>
              <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <RadioButton Content="{Binding}" IsChecked="{Binding IsSelected, RelativeSource={x:Static RelativeSource.TemplatedParent}}"/>
              </ControlTemplate>
            </Setter.Value>
          </Setter>
        </Style>
      </ListBox.ItemContainerStyle>
    </ListBox>
  </Grid>
</P