码迷,mamicode.com
首页 > Windows程序 > 详细

深入.NET和C#的小型汽车租赁系统的框架

时间:2016-03-09 20:59:27      阅读:376      评论:0      收藏:0      [点我收藏+]

标签:

前言:写这个小型系统之前呢,我们应该要猜测可能要用到哪些知识点。

那么对于这个小型系统:主要用到了如下的知识:

 封装,集合(ArrayList和HashTable)和泛型和非泛型集合(泛型:List<>和非泛型:Dictioanry<>),

构造函数,方法重载,多态(继承,抽象:抽象类和抽象方法)

效果图:

技术分享

 

技术分享技术分享

第一步.

创建几个类

01工具类(vehicle)(父类,超类,基类),此类为抽象类

有方法重载,构造函数

该类主要负责提供车类的属性

属性:

  public string Color { get; set; }
        public double DailyRent { get; set; }
        public string LicenseNO { get; set; }
        public string Name { get; set; }
        public int RentDate { get; set; }
        public string RentUser { get; set; }
        public int YearsOfService { get; set; }

02:创建一个汽车类(Car)(子类)

构造函数,方法重载。

03:创建一个卡车 类(Truck)(子类)

构造函数,方法重载

属性:

  public int Load

        {

            get { return load; }

            set { load = value; }

        }

04:创建一个工具(工厂)类(VehicleUtil)

第二步.

代码实现思路:

01:工具,父类(vehicle)

代码如下:

 public Vehicle()
        {
        }
        public Vehicle(string color, double dailyrent, string licenseno, string name, int yearsofservice)
        {
            Color = color;
            DailyRent = dailyrent;
            LicenseNO = licenseno;
            Name = name;
            YearsOfService = yearsofservice;
        }
        public abstract double CalcPrice();

02:汽车类(Car)

代码如下:

public Car()
        {
      }
        public Car(string licenseno, string name, string color, int yearsofservice, double dailyrent)
        {
           Color = color;
            DailyRent = dailyrent;
            LicenseNO = licenseno;
            Name = name;
            YearsOfService = yearsofservice;
        }
        public override double CalcPrice()
        {
            double totalPrice = 0;
            totalPrice = RentDate * DailyRent;
            return totalPrice;
        }

03:卡车 类(Truck)

代码如下:

  public Truck(string licenseno, string name, string color, int yearsofservice, double dailyrent, int load)
        {
           Color = color;
            DailyRent = dailyrent;
            LicenseNO = licenseno;
            Name = name;
            YearsOfService = yearsofservice;
            Load = load;
        }
        public override double CalcPrice()
        {
            double totalPrice = 0;
            totalPrice = RentDate * DailyRent;
           return totalPrice;
}

04:工具(工厂)类(VehicleUtil

代码如下:

 public static Vehicle CreateVehicle(string licenseno, string name, string color, int yearsofservice, double dailyrent, int load, string type)
        {
            Vehicle vehicle = null;
            switch (type)
            {
                case "Car":
                    vehicle = new Car(licenseno, name, color, yearsofservice, dailyrent);
                    break;
                case "Truck":
                    vehicle = new Truck(licenseno, name, color, yearsofservice, dailyrent, load);
                    break;
                default:
                    break;
            }
            return vehicle;
        }

第三步.

出租事件:(btnRent_Click(object sender, EventArgs e))

关键代码如下:

 if (lvlist.SelectedItems.Count == 0)
            {
                MessageBox.Show("请选择一行");
                return;
            }
            if (txtUser.Text == "")
            {
                MessageBox.Show("请输入客户名字!");
                return;
            }
            string key = lvlist.SelectedItems[0].Text;
            Vehicle vehicle = vehicles[key];
            vehicles.Remove(key);
            rentvehicles.Add(key, vehicle);
            PrintVehicles(vehicles, lvlist);
            MessageBox.Show("出租成功!!");
//PrintVehicles绑定数据到listview上
        public void PrintVehicles(Dictionary<string, Vehicle> listprirnt, ListView lvinfo)
        {
            ListViewItem lv=null;
            lvinfo.Items.Clear();
            foreach (Vehicle item in listprirnt.Values)
            {        
                if (item is Car)
                {
                    lv = new ListViewItem(item.LicenseNO);
                    lv.SubItems.Add(item.Name);
                    lv.SubItems.Add(item.Color.ToString());
                    lv.SubItems.Add(item.YearsOfService.ToString());
                    lv.SubItems.Add(item.DailyRent.ToString());
                    lvinfo.Items.Add(lv);
                }
               else if(item is Truck)
                {
                    lv = new ListViewItem(item.LicenseNO);
                    lv.SubItems.Add(item.Name);
                    lv.SubItems.Add(item.Color.ToString());
                    lv.SubItems.Add(item.YearsOfService.ToString());
                    lv.SubItems.Add(item.DailyRent.ToString());
                    lv.SubItems.Add(((Truck)item).Load.ToString());
                    lvinfo.Items.Add(lv);
                }

  第四步

还车.在btnGiveMoney_Click事件中写   

  if (txtDayNum.Text == string.Empty)
            {
                MessageBox.Show("请输入天数!");
                return;
            }
            string addNum = lvlistGive.SelectedItems[0].Text;
            Vehicle vechile = rentvehicles[addNum];
            rentvehicles.Remove(addNum);
            vechile.RentDate = Convert.ToInt32(txtDayNum.Text);
            double money = 0;
            //调用计算价格方法
            money = vechile.CalcPrice();
            MessageBox.Show("你一共要福le" + money);
            vehicles.Add(addNum, vechile);
             //刷新
            PrintVehicles(rentvehicles, lvlistGive);
            MessageBox.Show("成功!!");

第五步.

添加车辆在 btnIncAR_Click事件中写

if (txtWeight.Text == "" || txtUseTime.Text == "" || txtType.Text == "" || txtID.Text == "" || txtDayRentMoney.Text == "" || cboColor.Text == "")

            {
                MessageBox.Show("请您填写完整!");
            }
            else
            {
                string licon = txtID.Text;
                string color = cboColor.Text;
                double mon = Convert.ToDouble(txtDayRentMoney.Text);
                int tine = Convert.ToInt32(txtUseTime.Text);
                string ty = txtType.Text;
               if (radJiaoCar.Checked)
               {
                    Car ca = new Car(licon, ty, color, tine, mon);
                    vehicles.Add(licon, ca);
                }
               if (radKaCar.Checked)
                {
                   int load = Convert.ToInt32(txtWeight.Text);
                    Truck tr = new Truck(licon, ty, color, tine, mon, load);
                    vehicles.Add(licon, tr);
                }
                MessageBox.Show("添加成功!");
            }

注:此文没有代码的注释,是因为想在看代码的任何情况下,

也能看懂代码的含义。

 

 

深入.NET和C#的小型汽车租赁系统的框架

标签:

原文地址:http://www.cnblogs.com/whyhappy/p/5259151.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!