使用了menuStrip 菜單組件，">"為button1,"<"為button2，"下單"為button3 ，兩個ListBox

畫好菜單後

private void button1_Click(object sender, EventArgs e)
        {

            for (int i = 0; i < listBox1.SelectedItems.Count; i++)  //選擇菜品然後計數
            {
                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--)  //重最後一個開始刪除
            {
                listBox2.Items.Remove(listBox2.SelectedItems[i]);
            }
        }

 private void SetListMenu(string[] data)   //定義一個方法
        {
            listBox1.Items.Clear();
            for (int i = 0; i < data.Length; i++)
            {
                listBox1.Items.Add(data[i]);
            }
        }

插入菜品

 private void 中餐ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "辣子雞丁", "紅燒排骨", "麻婆豆腐", "香脆裏脊",
                                "糖醋排骨", "宮保雞丁", "香酥雞",
                                "醋溜白菜", "小雞燉蘑菇", "豬肉燉粉條", "芹菜香幹", "魚香肉絲" };
            SetListMenu(data);
        }                                                    
 

        private void 西餐ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "牛排", "豬扒", "意大利面", "雞扒", "香辣雞腿堡", "培根漢堡" };
            SetListMenu(data);
        }

        private void 紅酒ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "拉斐", "長城幹紅", "華夏幹紅", "張裕" };
            SetListMenu(data);
        }

        private void 飲料ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "雪碧", "可樂", "奶茶", "紅茶", "咖啡", "果汁", "開水" };
            SetListMenu(data);
        }

        private void 湯ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "冬瓜排骨湯", "羅宋湯", "老鴨湯", "老母雞湯", "紫菜蛋花湯", "三鮮湯" };
            SetListMenu(data);
        }

        private void 冰激淩ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "草莓", "巧爾滋", "聖代", "哈根達斯" };
            SetListMenu(data);
        }

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

        private void 小食ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string[] data = { "漢堡", "炸雞腿", "薯條", "雞塊" };
            SetListMenu(data);
        }

      

前面有幾個組合菜品沒有添加，因為我沒有想到有什麽菜！！！　　

最後面下單顯示

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

簡單的點餐系統