private void UpdateForm()
{
Title = titleTextBox.Text;
Author = authorTextBox.Text;
Publisher = publisherTextBox.Text;
Year = Convert.ToInt32(yearNumericUpDown.Value);
Quality = qualityTextBox.Text;
Price = Convert.ToSingle(priceNumericUpDown.Value);
button1.Enabled = InputValidator.validateTitle(Title) &&
InputValidator.validateAuthor(Author) &&
InputValidator.validatePublisher(Publisher) &&
InputValidator.validateYear(Year) &&
InputValidator.validateQuality(Quality) &&
InputValidator.validatePrice(Price);
}
private void UpdateForm()
{
Publisher = textBox1.Text;
button1.Enabled = InputValidator.validatePublisher(Publisher);
}