如何使用MVVM在WPF中应用可编辑组合框中的搜索

public class MyViewModel : INotifyPropertyChanged
{
    private ObservableCollection<string> _data;
    public ObservableCollection<string> Data
    {
        get { return _data; }
        set
        {
            _data = value;
            OnPropertyChanged(nameof(Data));
        }
    }

    private string _searchKeyword;
    public string SearchKeyword
    {
        get { return _searchKeyword; }
        set
        {
            _searchKeyword = value;
            OnPropertyChanged(nameof(SearchKeyword));
            FilterData();
        }
    }

    public MyViewModel()
    {
        // 初始化数据源集合
        Data = new ObservableCollection<string>
        {
            "Apple",
            "Banana",
            "Orange",
            "Grapes",
            "Watermelon"
        };
    }

    private void FilterData()
    {
        // 使用LINQ过滤数据源集合
        var filteredData = Data.Where(d => d.Contains(SearchKeyword)).ToList();
        Data = new ObservableCollection<string>(filteredData);
    }

    public event PropertyChangedEventHandler PropertyChanged;
    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

<Window x:Class="MyApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:MyApp"
        Title="My Application" Height="450" Width="800">
    <Window.DataContext>
        <local:MyViewModel />
    </Window.DataContext>
    <Grid>
        <ComboBox ItemsSource="{Binding Data}"
                  Text="{Binding SearchKeyword, UpdateSourceTrigger=PropertyChanged}"
                  IsEditable="True" />
    </Grid>
</Window>