private void swipeButton_Click(object sender, RoutedEventArgs e)
{
int barcode = 0;
errorMessageLabel.Content = "";
string borrowerIDstr = barcodeDataBox.Text;
if (String.IsNullOrWhiteSpace(borrowerIDstr))
{
errorMessageLabel.Content = "Barcode cannot be empty or blank.";
}
else
{
try
{
barcode = Convert.ToInt32(borrowerIDstr);
if (barcode <= 0)
{
throw new FormatException();
}
_listener.bookScanned(barcode);
}
catch (FormatException)
{
errorMessageLabel.Content = "Barcode must be a positive integer.";
}
catch (OverflowException)
{
errorMessageLabel.Content = "Barcode cannot be so big.";
}
barcodeDataBox.Text = "";
}
}
