private void HideAcctNumElements()
{
AccountNumberText.Hide();
AcctNumTextBox.Hide();
Warning.Hide();
SubmitAcctNumButton.Hide();
InterestEarned.Hide();
}
private void btnCalculator_Click(object sender, EventArgs e)
{
{
double Principal, AnnualRate, InterestEarned;
double FutureValue, RatePerPeriod;
int NumberOfPeriods, CompoundType;
Principal = Double.Parse(txtPrincipal.Text);
AnnualRate = Double.Parse(txtInterest.Text) / 100;
if (rdoMonthly.Checked)
{
CompoundType = 12;
}
else if (rdoQuarterly.Checked)
{
CompoundType = 4;
}
else if (rdoSemiannually.Checked)
{
CompoundType = 2;
}
else
{
CompoundType = 1;
}
NumberOfPeriods = Int32.Parse(txtPeriods.Text);
double i = AnnualRate / CompoundType;
int n = CompoundType * NumberOfPeriods;
RatePerPeriod = AnnualRate / NumberOfPeriods;
FutureValue = Principal * Math.Pow(1 + i, n);
InterestEarned = FutureValue - Principal;
txtInterestEarned.Text = InterestEarned.ToString("C");
txtAmountEarned.Text = FutureValue.ToString("C");
}
}
private void ViewInterestBtn_Click(object sender, EventArgs e)
{
if (ViewInterestBtn.Text == "View Interest Earned")
{
int yearCounter = Convert.ToInt32(YearsNum.Text.ToString());
double interestEarned = (double)(MySavingsAccount.Balance * (yearCounter *
MySavingsAccount.InterestRate));
InterestEarned.Text = $"${interestEarned.ToString()}";
ViewInterestBtn.Text = "Reset";
HideInterestButtons();
InterestEarned.Show();
}
else if (ViewInterestBtn.Text == "Reset")
{
InterestEarned.Hide();
ShowInterestButtons();
ViewInterestBtn.Text = "View Interest Earned";
}
}
