WPF ListView多选MVVM，后面是最小代码

Question

我试图在WPF中实现一种方式，让用户在一个框中选择多个项目，然后通过按钮点击将这些选定的项目添加到另一个框中。

我正在努力坚持MVVM w /最小代码。我找到的解决方案显示DataContext是通过我试图避免的View代码操纵的。

我认为我的问题是我不知道如何从xaml切换IsSelected，但不确定。

XAML

<ListView
                            ItemsSource="{Binding AvailableStates, Mode=TwoWay}"
                            SelectedItem="{Binding SelectedStates, Mode=TwoWay}"
                            SelectionMode="Multiple"

                            DisplayMemberPath="state"
                            Grid.Row="1" 
                            Margin="5"
                            Grid.Column="1" 
                            Height="125"
                            Name="lvAvailableStates"
                            Grid.RowSpan="6" 
                            ScrollViewer.VerticalScrollBarVisibility="Visible"
                            ScrollViewer.CanContentScroll="True">
                            <ListView.ItemContainerStyle>
                                <Style TargetType="{x:Type ListBoxItem}">
                                    <Setter Property="IsSelected" Value="{Binding IsSelected}"/>
                                </Style>
                            </ListView.ItemContainerStyle>
                        </ListView>

<Button
                        Grid.Row="2"
                        Grid.Column="2"
                        Margin="10"
                            Command="{Binding AddSelectedStatesCommand}"
                        Content=">>" />

视图模型

 private ObservableCollection<SelectableItemWrapper<states_approved>> _selectedStates;
    public ObservableCollection<SelectableItemWrapper<states_approved>> SelectedStates
    {
        get { return _selectedStates; }
        set
        {

            _selectedStates = value;
            OnPropertyChanged();
        }
    }

    private void AddSelectedStates(object obj)
    {
        var selected = SelectedStates.Where(s => s.IsSelected)
            .Select(s => s.Item)
            .ToList();

        StatesApproved = selected;
    }

public CustomCommand AddSelectedStatesCommand
    {
        get
        {
            return new CustomCommand(AddSelectedStates, CanExecute);
        }
    } 

选择项目包装

public class SelectableItemWrapper<T>
{
    public bool IsSelected { get; set; }
    public T Item { get; set; }
}