用元件設計的計算多年通膨每年費用之表格後端的程式碼
using System;using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApp48
{
public partial class Form1 : Form
{
double yearSpend;
double allYears;
double flatRate;
double sum = 0;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text == "" || textBox2.Text == "" || textBox3.Text == "")
MessageBox.Show("要輸入必要數字才能計算");
else if (textBox1.Text.Any(c => c < 46 || c > 57||c==47)|| textBox2.Text.Any(c => c < 46 || c > 57 || c == 47) || textBox3.Text.Any(c => c < 46 || c > 57 || c == 47))//若填入的是數字或小數點以外，則顯示錯誤
MessageBox.Show("只能輸入數字");
else
{
sum = 0;
yearSpend = 0;
flatRate = 0;
yearSpend = double.Parse(textBox1.Text);
flatRate = double.Parse(textBox2.Text);
allYears = (int)double.Parse(textBox3.Text);
for (double i = 1; i <= allYears; i++)
{
sum += yearSpend;
yearSpend *= (1 + flatRate / 100);
}
label9.Text = sum.ToString("0.00");
label10.Text = allYears.ToString();
}
}
private void button2_Click(object sender, EventArgs e)
{
yearSpend = 0;
flatRate = 0;
allYears = 0;
sum = 0;
textBox1.Text = "";
textBox2.Text = "";
textBox3.Text = "";
label9.Text = "";
label10.Text = "";
}
private void button3_Click(object sender, EventArgs e)
{
yearSpend = 0;
textBox1.Text = "";
sum = 0;
}
private void button4_Click(object sender, EventArgs e)
{
flatRate = 0;
textBox2.Text = "";
sum = 0;
}
private void button5_Click(object sender, EventArgs e)
{
allYears = 0;
textBox3.Text = "";
sum = 0;
}
}
}
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