private void CalculateButton_Click(object sender, EventArgs e)
{
try
{
MortCalc = new MortgageCalculator();
MortCalc.MyMortgageAmount = double.Parse(MortAmountBox.Text);
if (MortCalc.MyMortgageAmount > 5000000 || MortCalc.MyMortgageAmount < 10000)
{
MessageBox.Show("Mortgage Amount cannot be greater than 5 million or less than 10,000");
return;
}
MortCalc.MyInterestRate = double.Parse(InterestRateAmountBox.Text);
if (MortCalc.MyInterestRate > 1)
{
MessageBox.Show("Interest Rate cannot be greater than 100%");
return;
}
MortCalc.MyMortgagePeriod = double.Parse(MortPeriodBox.Text);
if (MortCalc.MyMortgagePeriod > 65 || MortCalc.MyMortgagePeriod < 1)
{
MessageBox.Show("Mortgage Period cannot be greater than 65 years or less than 1 year.");
return;
}
double result = MortCalc.MortgagePaymentCalculator(MortCalc.MyMortgageAmount, MortCalc.MyInterestRate, MortCalc.MyMortgagePeriod);
MonthMortPaymentBox.Text = result.ToString("c");
CalcList.Add(MortCalc);
}
catch (Exception) {
MessageBox.Show("Invalid Entry");
}
}
public void TestCorrectMonthlyPaymentCalculation()
{
MortgageCalculator calc = new MortgageCalculator();
calc.MyMortgageAmount = 100000;
calc.MyInterestRate = 0.0392;
calc.MyMortgagePeriod = 30;
double expectedResult = 472.8147315508823;
Assert.AreEqual(expectedResult, calc.MortgagePaymentCalculator(calc.MyMortgageAmount, calc.MyInterestRate, calc.MyMortgagePeriod));
}
public MainWindowViewModel(RealFileProvider realFileProvider)
{
History = new ObservableCollection <MortgageCalculator>();
Calculator = new MortgageCalculator();
Calculator.MyMortgageAmount = 350000;
Calculator.MyInterestRate = 0.04;
Calculator.MyMortgagePeriod = 30;
this.fileProvider = realFileProvider;
CalculateCommand = new DelegateCommand(() =>
{
Calculator.MortgagePaymentCalculator();
History.Add(Calculator);
ExportToExcel.RaiseCanExecuteChanged();
Calculator = Calculator.Clone() as MortgageCalculator;
RaisePropertyChanged(nameof(Calculator));
});
}
