私はイライラしています。私は宿題をしている初心者ですが、なぜ私のメッセージボックスに同じ数字 (計算された最後の小計) が 5 回表示されるのか理解できないようです。for ループを使用して、値をリセットせずに配列に格納する方法がわかりません。誰でも助けることができますか?前もって感謝します。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace InvoiceTotal
{
public partial class frmInvoiceTotal : Form
{
public frmInvoiceTotal()
{
InitializeComponent();
}
// TODO: declare class variables for array and list here
decimal[] decArray = new decimal[5];
int intIndex = 0;
private void btnCalculate_Click(object sender, EventArgs e)
{
try
{
if (txtSubtotal.Text == "")
{
MessageBox.Show(
"Subtotal is a required field.", "Entry Error");
}
else
{
decimal subtotal = Decimal.Parse(txtSubtotal.Text);
if (subtotal > 0 && subtotal < 10000)
{
decimal discountPercent = 0m;
if (subtotal >= 500)
discountPercent = .2m;
else if (subtotal >= 250 & subtotal < 500)
discountPercent = .15m;
else if (subtotal >= 100 & subtotal < 250)
discountPercent = .1m;
decimal discountAmount = subtotal * discountPercent;
decimal invoiceTotal = subtotal - discountAmount;
discountAmount = Math.Round(discountAmount, 2);
invoiceTotal = Math.Round(invoiceTotal, 2);
txtDiscountPercent.Text = discountPercent.ToString("p1");
txtDiscountAmount.Text = discountAmount.ToString();
txtTotal.Text = invoiceTotal.ToString();
for (intIndex = 0; intIndex <= decArray.Length - 1; intIndex++)
{
decArray[intIndex] = invoiceTotal;
}
}
else
{
MessageBox.Show(
"Subtotal must be greater than 0 and less than 10,000.",
"Entry Error");
}
}
}
catch (FormatException)
{
MessageBox.Show(
"Please enter a valid number for the Subtotal field.",
"Entry Error");
}
txtSubtotal.Focus();
}
private void btnExit_Click(object sender, EventArgs e)
{
// TODO: add code that displays dialog boxes here
string totalstring = "";
foreach (decimal value in decArray)
{
totalstring += value + "\n";
}
MessageBox.Show(totalstring + "\n", "Order Totals");
this.Close();
}
} }