private void btnTotals_Click(object sender, EventArgs e)
{
ProgNumInv = 0;
ProgTotInv = 0;
ProgAvg = 0;
txtNumInv.Text = ProgNumInv.ToString();
txtTotInv.Text = ProgTotInv.ToString("c");
txtInvAvg.Text = ProgAvg.ToString("c");
}
private void btnCalculate_Click(object sender, EventArgs e)
{
decimal invoiceSubtotal = Convert.ToDecimal(txtEntSub.Text); //string to decimal
decimal discountPercent = 0m;
if (invoiceSubtotal >= 500)
{
discountPercent = .2m;
}
else if (invoiceSubtotal >= 250 && invoiceSubtotal < 500)
{
discountPercent = .15m;
}
else if (invoiceSubtotal >= 100 && invoiceSubtotal < 250)
{
discountPercent = .1m;
}
decimal discountAmount = invoiceSubtotal * discountPercent;
decimal invoiceTotal = invoiceSubtotal - discountAmount;
ProgNumInv++;
txtNumInv.Text = ProgNumInv.ToString();
ProgTotInv += invoiceTotal;
txtTotInv.Text = ProgTotInv.ToString("c");
ProgAvg = ProgTotInv / ProgNumInv;
txtInvAvg.Text = ProgAvg.ToString("c");
txtDisPer.Text = discountPercent.ToString("p1"); //decimal to string as percent w/ 1 dec place
txtDisAmo.Text = discountAmount.ToString("c"); //decimal to string as currency
txtTotal.Text = invoiceTotal.ToString("c"); //decimal to string as currency
txtSub.Text = invoiceSubtotal.ToString("C");
txtEntSub.Focus();
}