//Completes the payment, checkout
private void btnCheckOut_Click(object sender, EventArgs e)
{
//Price * count + VAT calculation is happening here
order.TotalCost = order.CalculateTotalPrice() + os.CalculateVAT(order);
//If the input is not a number, it goes as 0 to the DB
if (!System.Text.RegularExpressions.Regex.IsMatch(txtBoxTip.Text, @"^-?(([1-9]\d*)|0)(.0*[1-9](0*[1-9])*)?$"))
{
order.Tip = 0;
}
else
{
order.Tip = decimal.Parse(txtBoxTip.Text);
}
//Saves the comment
order.Feedback = txtBoxComment.Text;
os.CompleteOrder(order);
//Shows Payment was successfull message
MessageBox.Show("Payment was succesfully completed.", "Payment Succesful!", MessageBoxButtons.OK, MessageBoxIcon.Information);
Overview overview = new Overview(employee);
overview.Show();
this.Close();
}