C#实现DVD借出归还管理系统

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class DVD
    {
        static void Main(string[] args)
        {
            GongNeng gongNeng = new GongNeng();
            gongNeng.initial();  //初始化
            gongNeng.XianShi();  //遍历初始化信息
            gongNeng.CaiDan();  //选项菜单
        }
    }

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class XinXi
    {
        private string _name;//名称
        private int state;//借出状态
        private string date;//时间
 
        //属性封装
        public string Name { get => _name; set => _name = value; }//名称
        public int State { get => state; set => state = value; }//借出状态
        public string Date { get => date; set => date = value; }//时间
    }

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class GongNeng
    {
        XinXi[] xinxi = new XinXi[10];//对象数组存储数据
        //初始化信息
        #region  初始化信息
        public void initial() {
            xinxi[0] = new XinXi();
            xinxi[0].Name = "罗马假日";
            xinxi[0].State = 0;
            xinxi[0].Date = "2010-7-1";
 
            xinxi[1] = new XinXi();
            xinxi[1].Name = "风声鹤唳";
            xinxi[1].State = 1;
            xinxi[1].Date = "";
 
            xinxi[2] = new XinXi();
            xinxi[2].Name = "浪漫满屋";
            xinxi[2].State = 1;
            xinxi[2].Date = "";
        }
        #endregion
 
        //显示初始化信息
        #region  显示初始化信息
        public void XianShi() {
            Console.WriteLine("********初始化信息如下：********");
            foreach (XinXi item in xinxi) {
                if (item != null) {
                    Console.WriteLine(item.Name+"t"+item.State+"t"+item.Date);
                }
            }
            Console.WriteLine("********************************");
        }
        #endregion
 
        //DVD菜单
        #region  DVD菜单
        public void CaiDan()
        {
                Console.WriteLine("------------欢迎使用明宇迷你DVD管理器------------");
                Console.WriteLine("1.新增DVDn2.查看DVDn3.删除DVDn4.借出DVDn5.归还DVDn6.退出");
                Console.WriteLine("-------------------------------------------------");
                Console.Write("请输入您的选择：");
                int xuanZe = int.Parse(Console.ReadLine());
                switch (xuanZe)
                {
                    case 1:
                    //新增DVD
                        XinZeng();
                        break;
                    case 2:
                    //查看DVD
                        ChaXun();
                        break;
                    case 3:
                    //删除DVD
                        ShanChu();
                        break;
                    case 4:
                    //借出DVD
                        JieChu();
                        break;
                    case 5:
                    //归还DVD
                        GuiHuan();
                        break;
                    case 6:
                        //退出
                        Console.WriteLine("欢迎下次光临！");
                        break;
                    default:
                        //无选项
                        Console.WriteLine("对不起，没有该选项！");
                        break;
                }
        }
        #endregion
 
        //输入0，返回
        #region  输入0，返回
        public void FanHui() {
            do {
                Console.WriteLine("输入0，返回：");
                string Ling = Console.ReadLine();
                if (Ling.Equals("0")) {
                    CaiDan();
                }
            } while (true);
        }
        #endregion
 
        //新增DVD
        #region  新增DVD
        public void XinZeng() {
            bool flag = true;
            Console.WriteLine("此处实现新增DVD----->");
            Console.WriteLine("请输入DVD名称：");
            string dvdName = Console.ReadLine();
            for (int i=0; i< xinxi.Length; i++) {
                if (xinxi[i] == null) {
                    flag = false;
                    xinxi[i] = new XinXi();
                    xinxi[i].Name = dvdName;
                    xinxi[i].State = 1;
                    xinxi[i].Date = "";
                    Console.WriteLine("名称为{0}的DVD添加成功！", xinxi[i].Name);
                    break;
                }
            }
            if (flag) {
                Console.WriteLine("对不起，存储空间已满");
            }
            FanHui();//返回
        }
        #endregion
 
        //查询DVD
        #region  查询DVD
        public void ChaXun() {
            Console.WriteLine("此处实现查询DVD----->");
            Console.WriteLine("{0,-8}{1,-10}{2,-8}", "名称","状态","时间");
            string zhuangTai = String.Empty;
            foreach (XinXi item in xinxi)
            {
                if (item != null)
                {
                    if (item.State == 0) {
                        zhuangTai = "以借出";
                    } else if (item.State == 1) {
                        zhuangTai = "未借出";
                    }
                    Console.WriteLine("{0,-8}{1,-10}{2,-8}",item.Name, zhuangTai, item.Date);
                }
            }
            FanHui();//返回
        }
        #endregion
 
        //判断对应下标
        #region  判断对应下标
        public XinXi Duan(string dvdName) {
            foreach (XinXi item in xinxi) {
                if (item != null && item.Name.Equals(dvdName)) {
                    return item;
                }
            }
            return null;
        }
        #endregion
 
        //删除DVD
        #region  删除DVD
        public void ShanChu() {
            Console.WriteLine("此处实现删除DVD----->");
            Console.WriteLine("请输入DVD名称：");
            string dvdName = Console.ReadLine();
            XinXi renWu = Duan(dvdName);
            if (renWu == null) {
                Console.WriteLine("对不起，没有该DVD");
                return;
            }
            for (int i=0; i< xinxi.Length; i++) {
                if (renWu == xinxi[i] && xinxi[i].State == 1) {
                    for (int j = i; j < xinxi.Length-1; j++) {
                        xinxi[j] = xinxi[j + 1];
                    }
                    int nu = xinxi.Length - 1;
                    xinxi[nu] = null;
                    Console.WriteLine("订单删除成功！");
                    break;
                } else if (renWu == xinxi[i] && xinxi[i].State == 0) {
                    Console.WriteLine("对不起，订单为以借出状态不能删除！");
                    break;
                }
            }
            FanHui();//返回
        }
        #endregion
 
        //借出DVD
        #region  借出DVD
        public void JieChu() {
            Console.WriteLine("此处实现借出DVD----->");
            Console.WriteLine("请输入DVD名称：");
            string dvdName = Console.ReadLine();
            XinXi renWu = Duan(dvdName);
            if (renWu == null)
            {
                Console.WriteLine("对不起，没有该DVD");
                FanHui();//返回
            }
            if (renWu.State == 0) {
                Console.WriteLine("对不起，该DVD以被人抢先借走了！");
                FanHui();//返回
            }
            Console.WriteLine("请输入借出日期（年-月-日）：");
            string riQi = Console.ReadLine();
            bool flag = Money(riQi);
            if (!flag)
            {
                Console.WriteLine("对不起，您输入的日期不正确！");
                FanHui();//返回
            }
            else {
                renWu.State = 0;
                renWu.Date = riQi;
                Console.WriteLine("借出DVD成功！");
            }
            FanHui();//返回
        }
        #endregion
 
        //判断借出日期格式
        #region  判断借出日期格式
        public bool Money(string riQi)
        {
            string monval = @"^d{4}-d{1,2}-d{1,2}$";
            return Regex.IsMatch(riQi, monval);
        }
        #endregion
 
        //归还DVD
        #region  归还DVD
        public void GuiHuan() {
            Console.WriteLine("此处实现归还DVD----->");
            Console.WriteLine("请输入DVD名称：");
            string dvdName = Console.ReadLine();
            XinXi renWu = Duan(dvdName);
            if (renWu == null)
            {
                Console.WriteLine("对不起，没有该DVD");
                FanHui();//返回
            }
            if (renWu.State == 1)
            {
                Console.WriteLine("对不起，该DVD还没有借出不可归还！");
                FanHui();//返回
            }
            Console.WriteLine("请输入归还日期（年-月-日）：");
            string riQi = Console.ReadLine();
            bool flag = Money(riQi);
            if (!flag)
            {
                Console.WriteLine("对不起，您输入的日期不正确！");
                FanHui();//返回
            }
            else
            {
                string jieChu = renWu.Date;
                if (String.Compare(jieChu, riQi) < 0)
                {
                    //字符串转换为日期格式
                    DateTime dat1 = Convert.ToDateTime(jieChu);//借出
                    DateTime dat2 = Convert.ToDateTime(riQi);//日期
                    TimeSpan span = dat2.Subtract(dat1);
 
                    //求借出与归还之间的差值
                    int cha = span.Days + 1;
 
                    renWu.State = 1;
                    renWu.Date = "";
                    Console.WriteLine("n归还《{0}》成功!", renWu.Name);
                    Console.WriteLine("借出日期为：{0}", dat1);
                    Console.WriteLine("归还日期为：{0}", dat2);
                    Console.WriteLine("应付租金为：{0}",cha);
                }
                else {
                    Console.WriteLine("对不起，归还日期不能小于借出日期！");
                    FanHui();//返回
                }
            }
            FanHui();//返回
        }
        #endregion
    }