public void AddPaymentToTransaction()
{
DataManager dataManager = new DataManager(connectionString);
string transactionID = TransIDTextBox.Text;
string paymentDate = DateTime.Today.ToShortDateString();
double paymentAmount = Convert.ToDouble(PaymentTextBox.Text);
double newPrincipal;
if (currentPrincipal == 0)
{
newPrincipal = principal - paymentAmount;
}
else
{
newPrincipal = currentPrincipal - paymentAmount;
}
dataManager.InsertNewPayment(transactionID, paymentDate, paymentAmount.ToString(), newPrincipal.ToString());
if (newPrincipal == 0)
{
dataManager.UpdatePawnToClosed(transactionID);
}
}
