问WPF在某些条件下的ListView选择/取消选择

EN

<ListView 
    x:Name="ItemsLv" 
    SelectionChanged="ItemsLv_SelectionChanged" 
    SelectionMode="Single" />

public class MyListViewItem
{
    public string Text { get; set; }
    public bool IsSelectable { get; set; }

    public override string ToString()
    {
        return Text;
    }
}

public MainWindow()
{
    InitializeComponent();

    var items = new List<MyListViewItem>
    {
        new() { Text = "Item One", IsSelectable = true },
        new() { Text = "Item Two", IsSelectable = true },
        new() { Text = "Item Three", IsSelectable = false },
        new() { Text = "Item Four", IsSelectable = true }
    };
    
    ItemsLv.ItemsSource = items;
}

private void ItemsLv_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    // if this event wasn't caused by a new item that wasn't already
    // selected being selected, don't do anything extra
    if (e.AddedItems.Count <= 0)
    {
        return;
    }

    // get the newly selected item and cast it to a MyListViewItem so we can inspect the IsSelectable property
    var selectedItem = (MyListViewItem)ItemsLv.SelectedItem;
    
    // if it's a selectable item, we don't need to intervene
    if (selectedItem.IsSelectable)
    {
        return;
    }

    // we made it this far that means we tried to select an item that should NOT be selectable

    // if the new selected item caused us to UNselect an old item, put the selection back
    if (e.RemovedItems.Count > 0)
    {
        ItemsLv.SelectedItem = e.RemovedItems[0];
    }
    // otherwise (the first selection ever?) just set selection back to null
    else
    {
        ItemsLv.SelectedItem = null;
    }
}