ListBox with embedded CheckBox restricting one item to be checked - wpf

Question

I have a ListBox containing an ItemTemplate made up of a StackPanel containing a CheckBox and a Label. I want to allow only one list item to be checked at a time. I am having trouble understanding how I can get this accomplished. Here is the XAML describing the listbox:
<ListBox Grid.Row="0"
Grid.Column="0"
Width="180"
HorizontalAlignment="Left"
x:Name="listboxPlayers"
ItemsSource="{Binding Players}"
SelectedItem="{Binding SelectedPlayer, Mode=TwoWay}"
ScrollViewer.VerticalScrollBarVisibility="Visible">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="{Binding IsDefault, Mode=TwoWay}"
VerticalAlignment="Center"
Checked="CheckBox_Checked"
Unchecked="CheckBox_Unchecked"/>
<Label Content="{Binding Name}"
VerticalAlignment="Center" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
A Player is defined as this:
public class Player
{
public string Name { get; set; }
public bool IsDefault { get; set; }
}
My list of Players is defined like this:
public ObservableCollection<Player> Players { get; private set; }
My SelectedPlayer is defined like this:
public static readonly DependencyProperty SelectedPlayerProperty =
DependencyProperty.Register("SelectedPlayer", typeof(Player), typeof(MainWindow),
new FrameworkPropertyMetadata());
public Player SelectedPlayer
{
get { return (Player)GetValue(SelectedPlayerProperty); }
set { SetValue(SelectedPlayerProperty, value); }
}
I haven't been able to find a post or question that can help me. I've played with using a Checked event handler for the CheckBox but I can't seem to wrap my head around how I can relate the list to the correct Player in the list because the ListBox doesn't adjust the SelectedPlayer when the CheckBox is checked or unchecked.
Thanks very much.

Answer 1

I usually use the following style for displaying a ListBox using CheckBoxes (You can use RadioButtons too by just replacing the CheckBox control with a RadioButton
<Style x:Key="CheckBoxListBoxStyle" 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">
<CheckBox IsHitTestVisible="False" Focusable="false"
Content="{TemplateBinding ContentPresenter.Content}"
IsChecked="{Binding Path=IsSelected,RelativeSource={RelativeSource TemplatedParent},Mode=TwoWay}"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Setter.Value>
</Setter>
</Style>
Then it is simply used by something like
<ListBox ItemsSource="{Binding Players}"
Style="{StaticResource CheckBoxListBoxStyle}"
SelectedItem="{Binding SelectedPlayer, Mode=TwoWay}">

Answer 2

If you have something that should behave like a RadioButton, why not use a RadioButton?

Answer 3

Try configuring your ListBox to Selection Mode Single. And rather than a separate label you could just bind Name to the Content property of the CheckBox. I like the way that spaces. And you may need to implement InotifyPropertyChanged on player.