public static void DetermineMonth(MonthlyBreakdown month, int monthsOut)
{
DateTime today = DateTime.Now;
string displayMonth = today.AddMonths(monthsOut).ToString("MMMM") + " " + today.AddMonths(monthsOut).Year.ToString();
month.Month = displayMonth;
}
public static LoanDetails GetLoanDetails(decimal loanAmount, decimal termsInMonths, decimal interestRate)
{
//Create instance of Loan Detail class that will hold critical information
LoanDetails loanDetails = new LoanDetails();
//Convert strings to necessary decimals, place in loanDetail properties
loanDetails.LoanAmount = loanAmount;
loanDetails.TermsInMonths = termsInMonths;
loanDetails.InterestRate = interestRate / 100;
//RRRR, Calculate r, discount factor, and monthly payments
loanDetails.CalculateLoanParameters();
for (int i = 1; i <= Decimal.ToInt32(loanDetails.TermsInMonths); i++)
{
MonthlyBreakdown month = new MonthlyBreakdown();
month.MonthNumber = i;
LoanCalculations.DetermineMonth(month, i);
if (i == Decimal.ToInt32(loanDetails.TermsInMonths))
{
LoanCalculations.CalculateLastMonthDetailed(month, loanDetails);
}
else
{
LoanCalculations.CalculateMonthDetailed(month, loanDetails);
}
loanDetails.TotalLoanDetailsByMonth.Add(month);
}
return(loanDetails);
}
private Dictionary <int, MonthlyBreakdown> _initiateMonthlyBreakdown()
{
var breakdown = new Dictionary <int, MonthlyBreakdown>();
foreach (int month in Enum.GetValues(typeof(Months)))
{
breakdown[month] = new MonthlyBreakdown(month);
}
return(breakdown);
}
public static void CalculateLastMonthDetailed(MonthlyBreakdown month, LoanDetails loanDetails)
{
month.StartingBalance = loanDetails.Balance;
month.PeriodInterest = month.StartingBalance * loanDetails.R;
month.PeriodPrincipal = month.StartingBalance;
month.MonthlyPayment = Math.Round(month.PeriodInterest, 2) + Math.Round(month.PeriodPrincipal, 2);
month.EndingBalance = month.StartingBalance - month.PeriodPrincipal;
loanDetails.Balance = month.EndingBalance;
loanDetails.TotalInterest += month.PeriodInterest;
month.TotalInterestToDate = loanDetails.TotalInterest;
loanDetails.TotalPrincipal += month.PeriodPrincipal;
}
