private void button1_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(txtTitle.Text) || Convert.ToInt32(lblID.Text) <= 0)
{
MessageBox.Show("One or more field haven't been filled correctly");
return;
}
if (libraryApp.UpdateBook(Convert.ToInt32(lblID.Text), txtTitle.Text.Trim(), txtAuthor.Text.Trim(), txtPublisher.Text.Trim(), dtpPublished.Value))
{
MessageBox.Show("Update Success");
}
else
{
MessageBox.Show("Error occurred\n Please relogin if the error continues!");
}
}