汽车租赁系统 封装。继承和多态

小总结：在汽车租赁系统中用到了类的方法，构造函数，值类型，和引用类型

使用集合储存数据，并能使用封装，继承，多态创建和操作类

   

  关系图

 1.租车。。显示系统中所有可出租的汽车，选中要出租的汽车，输入租用人 以出租汽车      

                                           

代码如下：

 public Dictionary<string, Vehicle> vehicles;//可租的车的集合保存
        public Dictionary<string, Vehicle> renttVehicles;//租出的车的集合保存
        private void Form1_Load(object sender, EventArgs e)
        {
            //将数据加载到集合中
            vehiclee();
            //默认载重量文本框不可用
            this.txtzai.ReadOnly = true;
        }
        //构造出两辆小汽车，两辆卡车
        public void vehiclee()
        {
            //实例化未出租字典类型的集合
            vehicles = new Dictionary<string, Vehicle>();
            Car dd = new Car("粉色", 99999, "京P1111", "捷豹TK07", 1);
            Truck ds = new Truck("蓝色", 150, "豫C6644", "长江卡货", 2, 40);
            vehicles.Add(dd.LicenseNo, dd);
            vehicles.Add(ds.LicenseNo, ds);
            //实例化已出租字典类型的集合
            renttVehicles = new Dictionary<string, Vehicle>();
            //出租出去的车
            Car  car= new Car("白色", 240, "京PC9K11", "奥迪A8", 3);
            Truck  truck= new Truck("黑色", 582, "京AP6666", "擎天柱", 5, 30);
            renttVehicles.Add(car.LicenseNo, car);
            renttVehicles.Add(truck.LicenseNo, truck);
            car.RentUser = this.txtname.Text;

        }
   public void PrintVehicles(Dictionary<string, Vehicle> rnotrent, ListView lvshow)
        {
            lvshow.Items.Clear();
            foreach (Vehicle item in rnotrent.Values)
            {
                ListViewItem lvitem = new ListViewItem(item.LicenseNo);
                if (item is Car)
                {
                    lvitem.SubItems.Add(item.Name);
                    lvitem.SubItems.Add(item.Color.ToString());
                    lvitem.SubItems.Add(item.YearsOfService.ToString());
                    lvitem.SubItems.Add(item.DailyRent.ToString());

                }
                if (item is Truck)
                {
                    lvitem.SubItems.Add(item.Name);
                    lvitem.SubItems.Add(item.Color.ToString());
                    lvitem.SubItems.Add(item.YearsOfService.ToString());
                    lvitem.SubItems.Add(item.DailyRent.ToString());
                    lvitem.SubItems.Add(((Truck)item).Load.ToString());
                }
                lvshow.Items.Add(lvitem);
            }
        }                                                                                                                                
                                              
        //租车
        private void button2_Click(object sender, EventArgs e)
        {
            if (txtname.Text=="")
            {
                MessageBox.Show("请您输入租用者的姓名再来租用！哦");
                return;
            }
            //从可租车辆集合中移除车辆A
            //将A添加到已租车辆集合中
            if (listView1.SelectedItems.Count>0)
            {
                string number = listView1.SelectedItems[0].Text;
                Vehicle ve = vehicles[number];
                vehicles.Remove(number);
                PrintVehicles(vehicles, listView1);//重新绑定 ListView
                renttVehicles.Add(number, ve);
                MessageBox.Show("已出租。", "提示！", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }
        //刷新
        private void button1_Click(object sender, EventArgs e)
        {
            PrintVehicles(vehicles, listView1);
        }

        //关闭窗体
        private void button6_Click(object sender, EventArgs e)
        {
            this.Close();
        }

2.还车。在还车列表中选择汽车信息，输入出租天数，计算租金                                    

                                                          

                                                    

    //结算
        private void button3_Click(object sender, EventArgs e)
        {
            if (textBox2.Text==string.Empty)
            {
                MessageBox.Show("请输入租出时间！");
                return;
            }
            //01.将车A从已租集合中移除   //02,将车A加入到可租车辆中
            string number = listView2.SelectedItems[0].Text;
            Vehicle ve = renttVehicles[number];
            renttVehicles.Remove(number);
            PrintVehicles(renttVehicles, listView2);//重新绑定 ListView
            vehicles.Add(number, ve);
            ve.RentDate = Convert.ToInt32(textBox2.Text);
            double money = 0;
            money = ve.CalcPrice();
            MessageBox.Show("您需要支付"+money+"元");
        }
        //刷新
        private void button4_Click(object sender, EventArgs e)
        {
            PrintVehicles(renttVehicles, listView2);
        }

3.新手入库。需要录入汽车的车牌号，车型，颜色使用时间和每日租金。如果是卡车还要录入卡车的载重，

                         

      //入库
        private void button5_Click(object sender, EventArgs e)
        {
            if (txthao.Text == string.Empty || txtxing.Text == string.Empty || cmdse.Text == string.Empty || txtshijan.Text == string.Empty 
                || txtmei.Text == string.Empty)
            {
                MessageBox.Show("请您都填写完整在入库！");
            }
            else
            {
                string linno = txthao.Text;
                string xing = txtxing.Text;
                string color = cmdse.Text;
                int time = Convert.ToInt32(txtshijan.Text);
                double zu = Convert.ToDouble(txtmei.Text);
                if (radioButton1.Checked)
                {
                    Car dd = new Car(color, zu, linno, xing, time);
                    vehicles.Add(linno, dd);
                }
                if (radioButton2.Checked)
                {
                    
                    int load = Convert.ToInt32(txtzai.Text);
                    Truck ds = new Truck(color, zu, linno, xing, time, load);
                    vehicles.Add(linno, ds);
                }
                MessageBox.Show("添加成功@！");
            }
        }
        //切换到汽车载重量变成不可选用
        private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {
            this.txtzai.ReadOnly = true;
        }
        //切换到卡车添加清空一下所有的文本框
        private void radioButton2_CheckedChanged(object sender, EventArgs e)
        {
            this.txthao.Text = string.Empty;
            this.txtmei.Text = string.Empty;
            this.txtname.Text = string.Empty;
            this.txtshijan.Text = string.Empty;
            this.txtxing.Text = string.Empty;
            this.txtzai.Text = string.Empty;
            this.txtzai.ReadOnly = false;
        }