public void TestAmortization()
{
double result = AmortizationSchedule.getInstance().calculateMonthlyPayment(360, 4.5f, 200000.0f);
Console.WriteLine("Monthly payment = {0}", result);
AmortizationSchedule.getInstance().getSchedule(360, 4.5, 200000.0);
Console.WriteLine("Principle for 1058.42, at 4.5% over 30 years = {0}", AmortizationSchedule.getInstance().calculatePrinciple(360, 4.875, 1058.42));
Console.WriteLine("APR for 1058.42, for 200,0000 over 30 years = {0}", AmortizationSchedule.getInstance().calculateAPR(360, 200000, 1058.42));
Loan loan = new Loan("House Loan", new DateTime(2011, 6, 29), 4.5, 2000000.0, 360.0);
LoanPayment payment = new LoanPayment(1500.0, 1100.0, 400.0, 0.0);
loan.addPayment(payment);
Profile profile = new Profile("Brian");
profile.addLoan(loan);
// Create a new XmlSerializer instance with the type of the test class
XmlSerializer SerializerObj = new XmlSerializer(typeof(Profile));
// Create a new file stream to write the serialized object to a file
TextWriter WriteFileStream = new StreamWriter("./test.xml");
SerializerObj.Serialize(WriteFileStream, profile);
//TextReader ReadStream = new StreamReader("./test.xml");
//Loan loan2 = (Loan)SerializerObj.Deserialize(ReadStream);
//Console.WriteLine("Loan apr = {0}", loan.APR);
//AmortizationPayment p = (AmortizationPayment)loan.PaymentHistory[0];
//Console.WriteLine("Payment Interest = {0}", p.InterestPaid);
// Cleanup
WriteFileStream.Close();
//ReadStream.Close();
}
public ArrayList getSchedule(int months, double yearlyAPR, double principle)
{
ArrayList list = new ArrayList();
double monthlyPayment = calculateMonthlyPayment(months, yearlyAPR, principle);
double remainingPrinciple = principle;
double monthlyRate = getMonthlyInterestRate(yearlyAPR);
for (int i = 0; i < months; i++)
{
//Round to the nearest penny
double interestPaid = monthlyRate * remainingPrinciple;
interestPaid = (double)roundToNearestPenny((double)interestPaid);
//Remainder of the payment is principle
double principlePaid = monthlyPayment - interestPaid;
//Any extra paid on top of the monthly payment
double extraPaid = 0;
//Create a payment with these values
LoanPayment payment = new LoanPayment(monthlyPayment+extraPaid, interestPaid, principlePaid, extraPaid);
//Add the payment to the list
list.Add(payment);
//Adjust the remaining principle on the loan
remainingPrinciple -= principlePaid;
}
remainingPrinciple = roundToNearestPenny(remainingPrinciple);
//Tack on the remainder on the last payment
LoanPayment lastPayment = (LoanPayment)list[months - 1];
lastPayment.TotalPayment += remainingPrinciple;
lastPayment.PrinciplePaid += remainingPrinciple;
double principleSum = 0;
int num = 0;
/*
foreach (LoanPayment payment in list)
{
num++;
Console.WriteLine("{0}: {1}", num, payment);
principleSum += payment.PrinciplePaid;
}*/
for (int i = 0; i < 100; i++)
{
LoanPayment payment = (LoanPayment)list[i];
Console.WriteLine("{0}: {1}", num, payment);
}
Console.WriteLine("Principle to be paid = {0}", principle);
Console.WriteLine("Remaining Principle = {0}", remainingPrinciple);
Console.WriteLine("Total principle paid = {0}", principleSum);
return list;
}
public void addPayment(LoanPayment payment)
{
if (payment != null)
{
_paymentHistory.Add(payment);
}
updateTotals();
}