汽车租赁系统

一:汽车类

  public abstract  class Vehicle    {      public Vehicle() { }      public Vehicle(string licenseNO,string name,string color,int yearOfService,double dailyRent)      {          this.licenseNO = licenseNO;          this.name = name;          this.color = color;          this.yearOfService = yearOfService;a          this.dailyRent = dailyRent;      }      //租用日期        private int rentDate;        public int RentDate        {            get { return rentDate; }            set { rentDate = value; }        }      //租用者        private string rentUser;        public string RentUser        {            get { return rentUser; }            set { rentUser = value; }        }      //日租金        private double dailyRent;        public double DailyRent        {            get { return dailyRent; }            set { dailyRent = value; }        }      //使用时间        private int yearOfService;        public int YearOfService        {            get { return yearOfService; }            set { yearOfService = value; }        }      //颜色        private string color;        public string Color        {            get { return color; }            set { color = value; }        }      //车名        private string name;        public string Name        {            get { return name; }            set { name = value; }        }      //车牌号        private string licenseNO;        public string LicenseNO        {            get { return licenseNO; }            set { licenseNO = value; }        }      //计算价格的方法        public abstract double CalcPrice();    }

二:轿车类

public class Car:Vehicle    {       public Car(string licenseNO, string name, string color, int yearsOfService, double dailyRent)           : base(licenseNO, name, color, yearsOfService, dailyRent)       {           ;       }       public override double CalcPrice()       {           double totalPrice = 0;           double basicPrice = this.RentDate * this.DailyRent;           if (this.RentDate <= 30)           {               totalPrice = basicPrice;           }           else           {               totalPrice = basicPrice + (this.RentDate - 30) * this.DailyRent * 0.1;           }           return totalPrice;       }    }

三:卡车类

public class Truck:Vehicle    {       public Truck() { }       public Truck(string licenseNO, string name, string color, int yearsOfService, double dailyRent, int load)           : base(licenseNO, name, color, yearsOfService, dailyRent)       {           this.Load = load;       }       //载重量        private int load;        public int Load        {            get { return load; }            set { load = value; }        }       //卡车费用计算方法        // 30天以内(含30)按日租金计算        // 30天以上超出部分:每天，每吨（载重量）增加日租金10%        public override double CalcPrice()        {            double totalPrice = 0;            double basicPrice = RentDate * DailyRent;            if (RentDate<=30)            {                totalPrice = basicPrice;            }            else            {                totalPrice = basicPrice + (RentDate - 30) * (DailyRent * 0.1)*load;            }            return totalPrice;        }    }

四:汽车类型"工厂"

public class VehicleFactory    {       public static Vehicle CreateVehicle(string licenseNO,string name,string color,int yearOfService,double dailyRent,int load,string type)       {           Vehicle vehicle = null;           switch (type)           {               case "car":                   vehicle = new Car(licenseNO, name, color, yearOfService, dailyRent);                   break;               case "truck":                   vehicle = new Truck(licenseNO,name,color,yearOfService,dailyRent,load);                   break;               default:                   break;           }           return vehicle;       }    }

五:在主窗体加载汽车信息

 public partial class Rent : Form    {        public Rent()        {            InitializeComponent();        }        //保存可租用车的集合（车辆名称，车辆对象）        Dictionary<string, Vehicle> notRent;        //保存已租用车辆的集合。        Dictionary<string, Vehicle> alreadyRent;        private void btnQueryRent_Click(object sender, EventArgs e)        {            //刷新            MyRefresh(notRent, lvRent);        }        //构造出两辆小汽车，两辆卡车        public void LoadData()        {            //实例化未出租字典类型的集合            notRent = new Dictionary<string, Vehicle>();            Car car = new Car("京R00544", "奥迪A8", "黑色", 3, 240);            Truck truck = new Truck("京R44944", "东风", "蓝色", 3, 300, 20);            notRent.Add(car.LicenseNO,car);            notRent.Add(truck.LicenseNO,truck);            //实例化已出租字典类型的集合            alreadyRent = new Dictionary<string, Vehicle>();            //出租出去的车            Car rentCar = new Car("粤A001", "宝马318", "白色", 3, 250);            rentCar.RentUser = txtRenter.Text;            Truck rentTruck = new Truck("粤A002", "东风", "蓝色", 3, 400, 30);                       alreadyRent.Add(rentCar.LicenseNO, rentCar);            alreadyRent.Add(rentTruck.LicenseNO,rentTruck);        }

六:绑定TreeView,刷新显示

 public void MyRefresh(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);                    lvitem.SubItems.Add(item.YearOfService.ToString());                    lvitem.SubItems.Add(item.DailyRent.ToString());                }                if (item is Truck)                {                    lvitem.SubItems.Add(item.Name);                    lvitem.SubItems.Add(item.Color);                    lvitem.SubItems.Add(item.YearOfService.ToString());                    lvitem.SubItems.Add(item.DailyRent.ToString());                    lvitem.SubItems.Add(((Truck)item).Load.ToString());                }                lvshow.Items.Add(lvitem);            }        }

 //刷新        private void btnQueryReturn_Click(object sender, EventArgs e)        {            MyRefresh(alreadyRent,lvReturn);        }

七:租车

 private void btnRent_Click(object sender, EventArgs e)        {            if (txtRenter.Text=="")            {                MessageBox.Show("请输入租车人名称");                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 (lvRent.SelectedItems.Count>0)            {                string number = lvRent.SelectedItems[0].Text;                Vehicle ve = notRent[number];                notRent.Remove(number);                MyRefresh(notRent,lvRent);                alreadyRent.Add(number, ve);                MessageBox.Show("租车成功！");            }                   }

八:还车界面的结算

 private void btnCompute_Click(object sender, EventArgs e)        {            if (txtRentDate.Text=="")            {                MessageBox.Show("请输入租车时间");                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=lvReturn.SelectedItems[0].Text;            Vehicle ve = alreadyRent[number];            alreadyRent.Remove(number);            MyRefresh(alreadyRent, lvReturn);            notRent.Add(number, ve);            ve.RentDate = Convert.ToInt32(txtRentDate.Text);            double money=0;                       money = ve.CalcPrice();            MessageBox.Show("您需要支付"+money+"元");        }

九:新车入库的添加

private void btnAdd_Click(object sender, EventArgs e)        {            string lincesN0=txtAutoNum.Text;            string name=txtName.Text;            string color=cobColor.Text;            int time=Convert.ToInt32(txtYears.Text);            double dailyRent=Convert.ToInt32(txtLetting.Text);                       if (rdoCar.Checked)            {                                Car car = new Car(lincesN0, name, color, time, dailyRent);                notRent.Add(lincesN0, car);            }            if (rdoTruck.Checked)            {                int load = Convert.ToInt32(txtLoad.Text);                Truck truck = new Truck(lincesN0, name, color, time, dailyRent, load);                notRent.Add(lincesN0, truck);            }            MessageBox.Show("添加成功！");        }

十:轿车和卡车的按钮

 private void rdoCar_CheckedChanged(object sender, EventArgs e)        {            txtLoad.Enabled = false;        }        private void rdoTruck_CheckedChanged(object sender, EventArgs e)        {            txtLoad.Enabled = true;        }