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

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