简单的点餐系统

private void button1_Click(object sender, EventArgs e)
        {

            for (int i = 0; i < listBox1.SelectedItems.Count; i++)  //选择菜品然后计数
            {
                string menu = listBox1.SelectedItems[i].ToString();  
                listBox2.Items.Add(menu);
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {
            for (int i = listBox2.SelectedItems.Count-1; i >=0 ; i--)  //重最后一个开始删除
            {
                listBox2.Items.Remove(listBox2.SelectedItems[i]);
            }
        }

 private void SetListMenu(string[] data)   //定义一个方法
        {
            listBox1.Items.Clear();
            for (int i = 0; i < data.Length; i++)
            {
                listBox1.Items.Add(data[i]);
            }
        }

 private void 中餐ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "辣子鸡丁", "红烧排骨", "麻婆豆腐", "香脆里脊",
                                "糖醋排骨", "宫保鸡丁", "香酥鸡",
                                "醋熘白菜", "小鸡炖蘑菇", "猪肉炖粉条", "芹菜香干", "鱼香肉丝" };
            SetListMenu(data);
        }                                                    
 

        private void 西餐ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "牛排", "猪扒", "意大利面", "鸡扒", "香辣鸡腿堡", "培根汉堡" };
            SetListMenu(data);
        }

        private void 红酒ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "拉斐", "长城干红", "华夏干红", "张裕" };
            SetListMenu(data);
        }

        private void 饮料ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "雪碧", "可乐", "奶茶", "红茶", "咖啡", "果汁", "开水" };
            SetListMenu(data);
        }

        private void 汤ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "冬瓜排骨汤", "罗宋汤", "老鸭汤", "老母鸡汤", "紫菜蛋花汤", "三鲜汤" };
            SetListMenu(data);
        }

        private void 冰激凌ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "草莓", "巧尔滋", "圣代", "哈根达斯" };
            SetListMenu(data);
        }

        private void 点心ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "巧克力蛋糕", "草莓蛋糕", "苹果派", "水果" };
            SetListMenu(data);
        }

        private void 小食ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "汉堡", "炸鸡腿", "薯条", "鸡块" };
            SetListMenu(data);
        }

      

 private void button3_Click(object sender, EventArgs e)
        {
            string msg = string.Format("\t您共点餐{0}项\n\n点餐时间：{1}", listBox2.Items.Count,DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"));
            MessageBox.Show(msg);
        }