Autocomplete combobox for WPF

Question

I need an autocomplete combobox for WPF C#. I\'ve tried several approaches but nothing works. For example I\'ve tried a combobox:

Answer 1

In XAML you should set IsEditable=True and add handler for PreviewKeyDown event:

private void ComboBox_PreviewKeyDown(object sender, KeyEventArgs e)
    {
        var cmb = (ComboBox)sender;
        cmb.IsDropDownOpen = true;
        var textbox = cmb.Template.FindName("PART_EditableTextBox", cmb) as TextBox;
        cmb.ItemsSource = CurrentStorage.Organisations.Where(p => string.IsNullOrEmpty(cmb.Text) || p.Name.ToLower().Contains(textbox.Text.ToLower())).ToList();
    }