汽車租賃系統 封裝。繼承和多態

小總結：在汽車租賃系統中用到了類的方法，構造函數，值類型，和引用類型

使用集合儲存數據，并能使用封裝，繼承，多態創建和操作類

關系圖

1.租車。。顯示系統中所有可出租的汽車，選中要出租的汽車，輸入租用人 以出租汽車

代碼如下：

 1  public Dictionary<string, Vehicle> vehicles;//可租的車的集合保存 2         public Dictionary<string, Vehicle> renttVehicles;//租出的車的集合保存 3         PRivate void Form1_Load(object sender, EventArgs e) 4         { 5             //將數據加載到集合中 6             vehiclee(); 7             //默認載重量文本框不可用 8             this.txtzai.ReadOnly = true; 9         }10         //構造出兩輛小汽車，兩輛卡車11         public void vehiclee()12         {13             //實例化未出租字典類型的集合14             vehicles = new Dictionary<string, Vehicle>();15             Car dd = new Car("粉色", 99999, "京P1111", "捷豹TK07", 1);16             Truck ds = new Truck("藍色", 150, "豫C6644", "長江卡貨", 2, 40);17             vehicles.Add(dd.LicenseNo, dd);18             vehicles.Add(ds.LicenseNo, ds);19             //實例化已出租字典類型的集合20             renttVehicles = new Dictionary<string, Vehicle>();21             //出租出去的車22             Car  car= new Car("白色", 240, "京PC9K11", "奧迪A8", 3);23             Truck  truck= new Truck("黑色", 582, "京AP6666", "擎天柱", 5, 30);24             renttVehicles.Add(car.LicenseNo, car);25             renttVehicles.Add(truck.LicenseNo, truck);26             car.RentUser = this.txtname.Text;27 28         }29    public void PrintVehicles(Dictionary<string, Vehicle> rnotrent, ListView lvshow)30         {31             lvshow.Items.Clear();32             foreach (Vehicle item in rnotrent.Values)33             {34                 ListViewItem lvitem = new ListViewItem(item.LicenseNo);35                 if (item is Car)36                 {37                     lvitem.SubItems.Add(item.Name);38                     lvitem.SubItems.Add(item.Color.ToString());39                     lvitem.SubItems.Add(item.YearsOfService.ToString());40                     lvitem.SubItems.Add(item.DailyRent.ToString());41 42                 }43                 if (item is Truck)44                 {45                     lvitem.SubItems.Add(item.Name);46                     lvitem.SubItems.Add(item.Color.ToString());47                     lvitem.SubItems.Add(item.YearsOfService.ToString());48                     lvitem.SubItems.Add(item.DailyRent.ToString());49                     lvitem.SubItems.Add(((Truck)item).Load.ToString());50                 }51                 lvshow.Items.Add(lvitem);52             }53         }                                                                                                                                                                              54         //租車55         private void button2_Click(object sender, EventArgs e)56         {57             if (txtname.Text=="")58             {59                 MessageBox.Show("請您輸入租用者的姓名再來租用！哦");60                 return;61             }62             //從可租車輛集合中移除車輛A63             //將A添加到已租車輛集合中64             if (listView1.SelectedItems.Count>0)65             {66                 string number = listView1.SelectedItems[0].Text;67                 Vehicle ve = vehicles[number];68                 vehicles.Remove(number);69                 PrintVehicles(vehicles, listView1);//重新綁定 ListView70                 renttVehicles.Add(number, ve);71                 MessageBox.Show("已出租。", "提示！", MessageBoxButtons.OK, MessageBoxIcon.Information);72             }73         }74         //刷新75         private void button1_Click(object sender, EventArgs e)76         {77             PrintVehicles(vehicles, listView1);78         }

1         //關閉窗體2         private void button6_Click(object sender, EventArgs e)3         {4             this.Close();5         }

2.還車。在還車列表中選擇汽車信息，輸入出租天數，計算租金

    //結算        private void button3_Click(object sender, EventArgs e)        {            if (textBox2.Text==string.Empty)            {                MessageBox.Show("請輸入租出時間！");                return;            }            //01.將車A從已租集合中移除   //02,將車A加入到可租車輛中            string number = listView2.SelectedItems[0].Text;            Vehicle ve = renttVehicles[number];            renttVehicles.Remove(number);            PrintVehicles(renttVehicles, listView2);//重新綁定 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.新手入庫。需要錄入汽車的車牌號，車型，顏色使用時間和每日租金。如果是卡車還要錄入卡車的載重，

 1       //入庫 2         private void button5_Click(object sender, EventArgs e) 3         { 4             if (txthao.Text == string.Empty || txtxing.Text == string.Empty || cmdse.Text == string.Empty || txtshijan.Text == string.Empty  5                 || txtmei.Text == string.Empty) 6             { 7                 MessageBox.Show("請您都填寫完整在入庫！"); 8             } 9             else10             {11                 string linno = txthao.Text;12                 string xing = txtxing.Text;13                 string color = cmdse.Text;14                 int time = Convert.ToInt32(txtshijan.Text);15                 double zu = Convert.ToDouble(txtmei.Text);16                 if (radioButton1.Checked)17                 {18                     Car dd = new Car(color, zu, linno, xing, time);19                     vehicles.Add(linno, dd);20                 }21                 if (radioButton2.Checked)22                 {23                     24                     int load = Convert.ToInt32(txtzai.Text);25                     Truck ds = new Truck(color, zu, linno, xing, time, load);26                     vehicles.Add(linno, ds);27                 }28                 MessageBox.Show("添加成功@！");29             }30         }31         //切換到汽車載重量變成不可選用32         private void radioButton1_CheckedChanged(object sender, EventArgs e)33         {34             this.txtzai.ReadOnly = true;35         }36         //切換到卡車添加清空一下所有的文本框37         private void radioButton2_CheckedChanged(object sender, EventArgs e)38         {39             this.txthao.Text = string.Empty;40             this.txtmei.Text = string.Empty;41             this.txtname.Text = string.Empty;42             this.txtshijan.Text = string.Empty;43             this.txtxing.Text = string.Empty;44             this.txtzai.Text = string.Empty;45             this.txtzai.ReadOnly = false;46         }