10-01 作業listbox 產生 開新視窗

Form1.cs

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 WindowsFormsApplication1
{
 
    public partial class Form1 : Form
    {
        Form2 newform;
       
  

        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            //宣告
            int a1, an, d, n, sn;
            //輸入
            a1 = int.Parse(textBox1.Text);
            d = int.Parse(textBox2.Text);
            n = int.Parse(textBox3.Text);

            //計算
            an = a1 + (n - 1) * d;
            sn = n * (a1 + an) / 2;
            //Post
            textBox4.Text = "" + an;
            textBox5.Text = "" + sn;
        }
        private void button2_Click(object sender, EventArgs e)
        {
            int sum = 0;
            int[,] arr1 = new int[99, 99];
            for (int i = 1; i <= 9; i++)
            {
                for (int j = 1; j <= 9; j++)
                {
                    sum = i * j;
                    arr1[i, j] = sum;
                }
            }

            for (int i = 1; i <= 9; i++)
            {
                for (int j = 1; j <= 9; j++)
                {
                    Console.WriteLine("" + i + "*" + "" + j + "=" + arr1[i, j]);
                    Console.WriteLine("i=" + i + "j= " + j);
                    listBox1.Items.Add("" + i + "*" + "" + j + "=" + arr1[i, j]);
                }
            }

                  

        }
        private void button3_Click(object sender, EventArgs e)
        {
            newform = new Form2();
            newform.Show();
        }
    }
}
   

==========================================================================
Form2.cs
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 WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        private void button3_Click(object sender, EventArgs e)
        {
            int sum = 0;
            int[,] arr1 = new int[99, 99];
            for (int i = 1; i <= 9; i++)
            {
                for (int j = 1; j <= 9; j++)
                {
                    sum = i * j;
                    arr1[i, j] = sum;
                }
            }

            for (int i = 1; i <= 9; i++)
            {
                for (int j = 1; j <= 9; j++)
                {
                    Console.WriteLine("" + i + "*" + "" + j + "=" + arr1[i, j]);
                    Console.WriteLine("i=" + i + "j= " + j);
                    listBox1.Items.Add("" + i + "*" + "" + j + "=" + arr1[i, j]);
                }
            }

                  
        }
    }
}