OnPropertyChanged未更新xzing条形码扫描器的UI

using System.ComponentModel;

public class BarcodeScannerViewModel : INotifyPropertyChanged
{
    private string _barcode;
    public string Barcode
    {
        get { return _barcode; }
        set
        {
            if (_barcode != value)
            {
                _barcode = value;
                OnPropertyChanged(nameof(Barcode));
            }
        }
    }

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

<Window x:Class="YourNamespace.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Barcode Scanner" Height="350" Width="525">
    <Grid>
        <TextBox Text="{Binding Barcode, UpdateSourceTrigger=PropertyChanged}" />
    </Grid>
</Window>

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        DataContext = new BarcodeScannerViewModel();
    }
}