private void txtBarcode_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
if (!stock.GetStock(this.txtBarcode.Text.Trim()))
{
MessageBox.Show("条码错误或商品库存不足！", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
this.txtBarcode.SelectAll();
}
else
{
this.txtBarcode.Text = string.Empty;
}
e.Handled = true;
}
}