汽车租赁系统（第二种方式）

一、系统窗体

 

1)vehic类

  //父类  汽车类
   public abstract  class Vehicle
    {
       //汽车牌照
        public string  CarID { get; set; }
       //汽车名
        public string Name { get; set; }
       //颜色
        public string  Color { get; set; }
       //使用 时间
        public int  RentDate { get; set; }
       //日租金
        public int Price { get; set; }
       //计算租金的抽象方法
        public abstract double GetPrice(int day);
    }

2）Car小轿车类

//小车类
   public  class Car:Vehicle
    {
       //计算汽车租金
        public override double GetPrice(int day)
        {
            double Price = this.Price * day;
            return Price;
        }
    }

　　

3）Truck卡车类

public  class Truck:Vehicle
    {
       //卡车载重
        public int Load { get; set; }

       //计算卡车的租金
        public override double GetPrice( int day)
        {
            double Price = this.Price * day;
            return Price;
        }
    }

　　

4）FrmMain窗体的代码

 public partial class FrmMain : Form
    {
        public FrmMain()
        {
            InitializeComponent();
        }
        //保存可租车辆的信息  （Key ： 车牌号  ，  Value： 车辆对象）
        public Dictionary<string, Vehicle> RentalCar = new Dictionary<string, Vehicle>();

        //保存租车 车辆信息  （Key : 车牌号 , Value 车辆对象）
        public Dictionary<string, Vehicle> EndCar = new Dictionary<string, Vehicle>();

       

        //初始化租车信息
        public void Rental()
        {
            Car car1 = new Car();
            car1.CarID = "京Ro7845";
            car1.Color = "红色";
            car1.Name = "奔驰";
            car1.Price = 100;
            car1.RentDate = 30;

            Car car2 = new Car();
            car2.CarID = "湘Rok545";
            car2.Color = "红色";
            car2.Name = "大众";
            car2.Price = 500;
            car2.RentDate = 30;
            
            Truck truck1 = new Truck();
            truck1.CarID = "粤Jo7845";
            truck1.Color = "黑色";
            truck1.Name = "路虎";
            truck1.Price = 60;
            truck1.RentDate = 30;
            truck1.Load = 130;

            Truck truck2 = new Truck();
            truck2.CarID = "赣Kjg845";
            truck2.Color = "白色";
            truck2.Name = "三菱";
            truck2.Price = 120;
            truck2.RentDate = 30;
            truck2.Load = 60;

            RentalCar.Add(car1.CarID, car1);
            RentalCar.Add(truck1.CarID, truck1);
            RentalCar.Add(car2.CarID, car2);
            RentalCar.Add(truck2.CarID, truck2);
        }

        private void FrmMain_Load(object sender, EventArgs e)
        {
            //初始化租车信息
            Rental();
            //绑定数据到租车信息的listview上
            GetDataToList();
        }

        //给租车Listview上绑定数据
        private void GetDataToList()
        {
            //清空Iistview集合的数据 重新绑定
            lvlist.Items.Clear();

            foreach (KeyValuePair<string,Vehicle> item in RentalCar)
            {
                ListViewItem list = new ListViewItem(item.Value.CarID);
                list.SubItems.Add(item.Value.Name);
                list.SubItems.Add(item.Value.Color);
                list.SubItems.Add(item.Value.RentDate.ToString());
                list.SubItems.Add(item.Value.Price.ToString());
                if (item.Value is Truck)
                {
                    Truck truck = (Truck)item.Value;
                    list.SubItems.Add(truck.Load.ToString());
                }
                else
                {
                    list.SubItems.Add("无");
                }
                
                
              
                lvlist.Items.Add(list);
            }
            
        }

        //给还车ListView绑定数据
        public void GetDataToListEnd()
        {

            //清空数据
            lvlistEnd.Items.Clear();

            foreach (KeyValuePair<string, Vehicle> item in EndCar)
            {
                ListViewItem list = new ListViewItem(item.Value.CarID);
                list.SubItems.Add(item.Value.Name);
                list.SubItems.Add(item.Value.Color);
                list.SubItems.Add(item.Value.RentDate.ToString());
                list.SubItems.Add(item.Value.Price.ToString());
                if (item.Value is Truck)
                {
                    Truck truck = (Truck)item.Value;
                    list.SubItems.Add(truck.Load.ToString());
                }
                else
                {
                    list.SubItems.Add("无");
                }



                lvlistEnd.Items.Add(list);
            }
            
        }

        //租车刷新
        private void button2_Click(object sender, EventArgs e)
        {
           

            GetDataToList();

        }

      
        //租车
        private void button1_Click(object sender, EventArgs e)
        {
            //判断租车人信息不为空
            if (txtName.Text != "")
            {
                //判断是否选中一项
                if (lvlist.SelectedItems.Count > 0)
                {
                    //获取选中车辆的车牌号
                string   CarID = lvlist.SelectedItems[0].SubItems[0].Text;
                    //在可租集合里面找到车牌号为CarID的车辆，并将其车对象赋值到已租车辆的集合中
                    EndCar.Add(CarID, RentalCar[CarID]);
                    //移除可租车辆里该车辆的信息
                    RentalCar.Remove(CarID);
                    MessageBox.Show("租车成功！！");
                }
                else
                {
                    MessageBox.Show("请选择一项！！");
                }
               
                
            }
            else
            {
                MessageBox.Show("请填写租车人信息!!");
            }
        }

        //还车刷新
        private void button3_Click(object sender, EventArgs e)
        {
            //刷新还车list
            GetDataToListEnd();
        }

        //选择选项卡时发生
        private void tabControl1_Selected(object sender, TabControlEventArgs e)
        {

            if (e.TabPage == tabPage1)     //租车的选项卡
            {
                //刷新租车List
                GetDataToList();
            }
            else if (e.TabPage == tabPage2)  //还车选项卡
            {
                //刷新还车list
                GetDataToListEnd();
            }
            else
            {
                rdoCar.Checked = true;
            }
          

        }

        //还车结算
        private void button4_Click(object sender, EventArgs e)
        {
          
            //判断租车时间不为空
            if (txtDay.Text != "")
            {
                //获得租车的天数
                int Day = Convert.ToInt32(txtDay.Text);

                //判断是否选中一项
                if (lvlist.SelectedItems.Count > 0)
                {
                    //获取选中车辆的车牌号
                    string CarID = lvlistEnd.SelectedItems[0].SubItems[0].Text;
                    //调用计算价格的方法
                    double Price = EndCar[CarID].GetPrice(Day);
                    MessageBox.Show("您的总价格是"+Price.ToString());
                    //将已借车辆从已借集合中复制到可借车辆集合中
                    RentalCar.Add(CarID,EndCar[CarID]);
                    //移除已借车辆集合中的该车对象
                    EndCar.Remove(CarID);
                }
                else
                {
                    MessageBox.Show("请选择一项！！");
                }
            }
            else
            {
                MessageBox.Show("请填写租车使用时间");
            }

        }

        //新车入库
        private void button5_Click(object sender, EventArgs e)
        {

            //获得车牌号
            string CarId = txtCarId.Text;
            //获得车名
            string CarName = txtName.Text;
            //获得车颜色
            string CarColor = rboColor.Text;
            //获得车使用时间
            int Day = Convert.ToInt32(txtuseTime.Text);
            //获得日租金
            int Price = Convert.ToInt32(txtPrice.Text);

            //判断是选中的卡车还是汽车
            if (rdoTruck.Checked == true)
            {
                //获得载重量
                int Height = Height = Convert.ToInt32(txtHeight.Text);
                Truck truck = new Truck();
                truck.CarID = CarId;
                truck.Name = CarName;
                truck.Price = Price;
                truck.RentDate = Day;
                truck.Color = CarColor;
                //将新增车加入到可借集合中
                RentalCar.Add(CarId,truck);

            }
            else
            {
                Car car = new Car();
                car.CarID = CarId;
                car.Name = CarName;
                car.Price = Price;
                car.RentDate = Day;
                car.Color = CarColor;
                //将新增车加入到可借集合中
                RentalCar.Add(CarId, car);
            }

           
        }

        //单选按钮
        private void rdoCar_CheckedChanged(object sender, EventArgs e)
        {
            //判断是选中的卡车还是汽车
            if (rdoTruck.Checked == true)
            {
                Clear();
                //启用载重控件
                txtHeight.Enabled = true;


            }
            else
            {
                Clear();
                //禁用载重控件
                txtHeight.Enabled = false;
            }
        }


        //清空txt文本的值
        public void Clear()
        {
              txtCarId.Text = "";
             txtName.Text = "";
             rboColor.Text = "";
             txtuseTime.Text= "";
              txtPrice.Text= "";
              txtCarName.Text = "";
        }
      



    }

　　这种方法相对简单理解