Arrow keys don't work after programmatically setting ListView.SelectedItem

Question

I have a WPF ListView control, ItemsSource is set to an ICollectionView created this way:

var collectionView = 
  System.Windows.Data.CollectionViewSource.Ge         


        

Answer 1

I found a somewhat different approach. I'm using databinding to make sure the correct item is highlighted in the code, and then instead of setting focus on every rebind, I simply add a pre-event handler to the code behind for keyboard navigation. Like this.

    public MainWindow()
    {
         ...
         this.ListView.PreviewKeyDown += this.ListView_PreviewKeyDown;
    }

    private void ListView_PreviewKeyDown(object sender, KeyEventArgs e)
    {
        UIElement selectedElement = (UIElement)this.ListView.ItemContainerGenerator.ContainerFromItem(this.ListView.SelectedItem);
        if (selectedElement != null)
        {
            selectedElement.Focus();
        }

        e.Handled = false;
    }

This simply makes sure that the correct focus is set before letting WPF handle the keypress