File-Based Applications: Bethesda Car Rental

	Bethesda Car Rental: Rental Orders

Introduction

To main purpose of a car rental company is to rent car. This is done by receiving orders from a customer and processing such an order. To proceed, a clerk would use a form to enter the customer and the car information. In our application, we will also make sure that name of the clerk who processed an order is specified. Other than than, we will enter as much information as possible to assist the user.

Practical Learning: Creating a Serializable Class

To add a new form to the project, on the main menu, click Project -> Add New Item...
In the Template section, click Windows Form
Set the Name to RentalRates and press Enter

Add a ListView to the form and create its Columns as follows:

(Name)	Text	TextAlign	Width
colCategory	Category		90
colDaily	Daily	Right
colWeekly	Weekly	Right
colMonthly	Monthly	Right
colWeekend	Weekend	Right

Create its Items as follows:

ListViewItem	ListViewSubItem	ListViewSubItem	ListViewSubItem	ListViewSubItem
	Text	Text	Text	Text
Economy	32.95	29.75	22.95	19.95
Compact	39.95	34.75	29.95	24.95
Standard	45.95	39.75	35.95	32.95
Full Size	49.95	42.75	38.95	35.95
Mini Van	55.95	50.75	45.95	42.95
SUV	55.95	50.75	45.95	42.95
Truck	42.75	38.75	35.95	32.95
Van	69.95	62.75	55.95	52.95

Complete the design of the form as follows:
To add a new class to the project, on the main menu, click Project -> Add Class...
In the Templates section, click Generic C++ Class and click Open
Set the Class Name to CRentalOrder and press Enter

Access the RentalOrder.h file and change it as follows:

#pragma once

using namespace System;

[Serializable]
__sealed __gc class CRentalOrder
{
public:
	int      ReceiptNumber;
	String  *ProcessedBy;
	String  *CarSelected;
	String  *Make;
	String  *Model;
	int	 Year;
	String  *CarCondition;
	String  *CustDrvLicNbr;
	String  *CustName;
	String  *CustAddress;
	String  *CustCity;
	String  *CustState;
	String  *CustZIPCode;
	String  *CustCountry;
	String  *TankLevel;
	long     Mileage;
	DateTime StartDate;
	DateTime EndDate;
	int      Days;
	double   RateApplied;
	double   SubTotal;
	double   TaxRate;
	double   TaxAmount;
	double   OrderTotal;

public:
	CRentalOrder(void);
	~CRentalOrder(void);
};

To add a new form to the project, on the main menu, click Project -> Add New Item...
In the Templates section, click Windows Form
Set the Name to RentalOrders and press Enter

Design the form as follows:

Control	Text	Name	Other Properties
GroupBox	Order Identification
Label	Processed By:
ComboBox		cboEmployees
GroupBox	Car Selected
ComboBox		cboCars
Label	Make:
TextBox		txtMake
Label	Model:
TextBox		txtModel
Label	Year:
TextBox		txtCarYear
label	Car Condition:
ComboBox		cboCarConditions
GroupBox	Customer
ComboBox		cboCustomers
Label	Name:
TextBox		txtCustName
Label	Address:
TextBox		txtCustAddress
TextBox		txtCustCity
TextBox	MD	txtCustState
TextBox		txtCustZIPCode
TextBox	USA	txtCustCountry
GroupBox	Order Evaluation

Right-click anywhere in the form and click View Code

In the top section of the file, type the following:

#pragma once

#using <System.Runtime.Serialization.Formatters.Soap.dll>

#include "Car.h"
#include "Employee.h"
#include "Customer.h"
#include "RentalRates.h"

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
using namespace System::IO;
using namespace System::Runtime::Serialization::Formatters::Soap;

namespace BCR2
{

In the class, declare a pointer variable to ArrayList named lstRentalOrders

private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container* components;
		ArrayList *lstRentalOrders;

Return to the CleaningOrders form
In the combo box above the Properties window, select RentalOrders and click the Events button

In the Events section, double-click Load and implement the event as follows:

System::Void RentalOrders_Load(System::Object *  sender, System::EventArgs *  e)
{
	  lstRentalOrders = new ArrayList;
	 ArrayList *lstEmployees = new ArrayList;
	 SoapFormatter *bcrSoap = new SoapFormatter();
	 String *strFilename = S"Employees.bcr";
			 
	 if( File::Exists(strFilename) )
	 {
FileStream *bcrStream = new FileStream(strFilename, FileMode::Open, FileAccess::Read, FileShare::Read);
		 lstEmployees = dynamic_cast<ArrayList *>(bcrSoap->Deserialize(bcrStream));
		 bcrStream->Close();

		 Employee *empl = new Employee;
		 String *firstName, *lastName, *title;

		 cboEmployees->Items->Clear();

		 for(int i = 0; i < lstEmployees->Count; i++)
		 {
			 empl = dynamic_cast<Employee *>(lstEmployees->Item[i]);

			 firstName = empl->FirstName;
			 lastName  = empl->LastName;
			 title     = empl->Title;
			 
			 cboEmployees->Items->Add(String::Concat(lastName, S", ", firstName, S" - ", title));
		 }
	 }

	 strFilename = S"Cars.bcr";
	 ArrayList *lstCars = new ArrayList;
			 
	 if( File::Exists(strFilename) )
	 {
FileStream *bcrStream = new FileStream(strFilename, FileMode::Open, FileAccess::Read, FileShare::Read);
		 lstCars = dynamic_cast<ArrayList *>(bcrSoap->Deserialize(bcrStream));
		 bcrStream->Close();

		 CCar *car = new CCar;

		 cboCars->Items->Clear();

		 for(int i = 0; i < lstCars->Count; i++)
		 {
			 car = dynamic_cast<CCar *>(lstCars->Item[i]);

			 cboCars->Items->Add(car->TagNumber);
		 }
	 }

	 strFilename = S"Customers.bcr";
	 ArrayList *lstCustomers = new ArrayList;
			 
	 if( File::Exists(strFilename) )
	 {
FileStream *bcrStream = new FileStream(strFilename, FileMode::Open, FileAccess::Read, FileShare::Read);
		 lstCustomers = dynamic_cast<ArrayList *>(bcrSoap->Deserialize(bcrStream));
		 bcrStream->Close();

		 CCustomer *cust = new CCustomer;

		 cboCustomers->Items->Clear();

		 for(int i = 0; i < lstCustomers->Count; i++)
		 {
			 cust = dynamic_cast<CCustomer *>(lstCustomers->Item[i]);

			 cboCustomers->Items->Add(cust->DrvLicNbr);
		 }
	 }
}

Return to the RentalOrders form. Double-click the Car Selected combo box and implement its SelectedIndexChanged event as follows:

System::Void cboCars_SelectedIndexChanged(System::Object *  sender, System::EventArgs *  e)
{
	 String *strFilename = S"Cars.bcr";
	 ArrayList *lstCars = new ArrayList;
	 CCar *car = new CCar;
	 SoapFormatter *bcrSoap = new SoapFormatter();

FileStream *bcrStream = new FileStream(strFilename, FileMode::Open, FileAccess::Read, FileShare::Read);
	 lstCars = dynamic_cast<ArrayList *>(bcrSoap->Deserialize(bcrStream));
	 bcrStream->Close();

	 for(int i = 0; i < lstCars->Count; i++)
	 {
		 car = dynamic_cast<CCar *>(lstCars->Item[i]);

		 if( car->TagNumber->Equals(cboCars->Text) )
		 {
			 this->txtMake->Text    = car->Make;
			 this->txtModel->Text   = car->Model;
			 this->txtCarYear->Text = car->Year.ToString();
			 return;
		 }
	 }
}

Return to the RentalOrders form. Double-click the Customer combo box and implement its SelectedIndexChanged event as follows:

System::Void cboCustomers_SelectedIndexChanged(System::Object *  sender, System::EventArgs *  e)
{
	 String *strFilename = S"Customers.bcr";
	 ArrayList *lstCustomers = new ArrayList;
	 CCustomer *cust = new CCustomer;
	 SoapFormatter *bcrSoap = new SoapFormatter();

FileStream *bcrStream = new FileStream(strFilename, FileMode::Open, FileAccess::Read, FileShare::Read);
	 lstCustomers = dynamic_cast<ArrayList *>(bcrSoap->Deserialize(bcrStream));
	 bcrStream->Close();

	 for(int i = 0; i < lstCustomers->Count; i++)
	 {
		 cust = dynamic_cast<CCustomer *>(lstCustomers->Item[i]);

		 if( cust->DrvLicNbr->Equals(cboCustomers->Text) )
		 {
			 this->txtCustName->Text    = cust->FullName;
			 this->txtCustAddress->Text = cust->Address;
			 this->txtCustCity->Text    = cust->City;
			 this->txtCustState->Text   = cust->State;
			 this->txtCustZIPCode->Text = cust->ZIPCode;
			 this->txtCustCountry->Text = cust->Country;
			 return;
		 }
	 }
}

Return to the RentalOrders form and double-click the Rate Applied button to implement its Click event as follows:

System::Void btnRateApplied_Click(System::Object *  sender, System::EventArgs *  e)
{
	 RentalRates *frmRates = new RentalRates;
	 frmRates->Show();
}

Return to the RentalOrders form and double-click the End Date control

Implement its Click event as follows:

System::Void dtpEndDate_ValueChanged(System::Object *  sender, System::EventArgs *  e)
{
	 DateTime dteStart = this->dtpStartDate->Value;
	 DateTime dteEnd  = this->dtpEndDate->Value;
	 TimeSpan tme = dteEnd - dteStart;
	 int days = tme.Days;

	 this->txtDays->Text = days.ToString();
}

Return to the RentalOrders form and click the text box on the right side of the Rate Applied button
In the Properties window, click Events and double-click the Leave field

Implement its event as follows:

System::Void txtRateApplied_Leave(System::Object *  sender, System::EventArgs *  e)
{
	 int days = this->txtDays->Text->ToInt32(0);
	 double rateApplied = this->txtRateApplied->Text->ToDouble(0);
	 double subTotal = days * rateApplied;
	 this->txtSubTotal->Text = subTotal.ToString(S"F");
	 double taxRate = this->txtTaxRate->Text->ToDouble(0);
	 double taxAmount = subTotal * taxRate / 100;
	 this->txtTaxAmount->Text = taxAmount.ToString(S"F");
	 double totalOrder = subTotal + taxAmount;
	 this->txtOrderTotal->Text = totalOrder.ToString(S"F");
}

Return to the RentalOrders form and double-click the Save button to implement its Click event as follows:

System::Void btnSave_Click(System::Object *  sender, System::EventArgs *  e)
{
	 static int receiptNumber = 0;
	 ArrayList *lstRentalOrders = new ArrayList;
	 String *strFilename = S"RentalOrders.bcr";
	 SoapFormatter *bcrSoap = new SoapFormatter();

	 if( File::Exists(strFilename) )
	 {
 FileStream *bcrStream = new FileStream(strFilename, FileMode::Open, FileAccess::Read, FileShare::Read);
		 lstRentalOrders = dynamic_cast<ArrayList *>(bcrSoap->Deserialize(bcrStream));

 CRentalOrder *order = __try_cast<CRentalOrder *>(lstRentalOrders->Item[lstRentalOrders->Count-1]);
		 receiptNumber = order->ReceiptNumber;
		 bcrStream->Close();
	 }
	 else
	 {
 FileStream *bcrStream = new FileStream(strFilename, FileMode::OpenOrCreate, FileAccess::Write, FileShare::Write);
		 bcrSoap->Serialize(bcrStream, lstRentalOrders);
		 bcrStream->Close();
	 }

	 CRentalOrder *rntOrder = new CRentalOrder;

	 rntOrder->ReceiptNumber = receiptNumber + 1;
	 rntOrder->ProcessedBy   = this->cboEmployees->Text;
	 rntOrder->CarSelected   = this->cboCars->Text;
	 rntOrder->Make			 = this->txtMake->Text;
	 rntOrder->Model		 = this->txtModel->Text;
	 rntOrder->Year			 = this->txtCarYear->Text->ToInt32(0);
	 rntOrder->CarCondition  = this->cboCarConditions->Text;
	 rntOrder->CustDrvLicNbr = this->cboCustomers->Text;
	 rntOrder->CustName		 = this->txtCustName->Text;
	 rntOrder->CustAddress   = this->txtCustAddress->Text;
	 rntOrder->CustCity		 = this->txtCustCity->Text;
	 rntOrder->CustState	 = this->txtCustState->Text;
	 rntOrder->CustZIPCode	 = this->txtCustZIPCode->Text;
	 rntOrder->CustCountry	 = this->txtCustCountry->Text;
	 rntOrder->TankLevel	 = this->cboTankLevels->Text;
	 rntOrder->Mileage		 = this->txtMileage->Text->ToInt32(0);
	 rntOrder->StartDate	 = this->dtpStartDate->Value;
	 rntOrder->EndDate		 = this->dtpEndDate->Value;
	 rntOrder->Days			 = this->txtDays->Text->ToInt32(0);
	 rntOrder->RateApplied	 = this->txtRateApplied->Text->ToDouble(0);
	 rntOrder->SubTotal		 = this->txtSubTotal->Text->ToDouble(0);
	 rntOrder->TaxRate		 = this->txtTaxRate->Text->ToDouble(0);
	 rntOrder->TaxAmount	 = this->txtTaxAmount->Text->ToDouble(0);
	 rntOrder->OrderTotal	 = this->txtOrderTotal->Text->ToDouble(0);
			 
	 lstRentalOrders->Add(rntOrder);

 FileStream *bcrStream = new FileStream(strFilename, FileMode::OpenOrCreate, FileAccess::Write, FileShare::Write);
	 bcrSoap->Serialize(bcrStream, lstRentalOrders);
	 bcrStream->Close();

	 this->cboEmployees->Text = S"";
	 this->cboCars->Text = S"";
	 this->txtMake->Text = S"";
	 this->txtModel->Text = S"";
	 this->txtCarYear->Text = S"2000";
	 this->cboCarConditions->Text = S"";
	 this->cboCustomers->Text = S"";
	 this->txtCustAddress->Text = S"";
	 this->txtCustAddress->Text = S"";
	 this->txtCustCity->Text = S"";
	 this->txtCustState->Text = S"MD";
	 this->txtCustZIPCode->Text = S"";
	 this->txtCustCountry->Text = S"USA";
	 this->cboTankLevels->Text = S"";
	 this->txtMileage->Text = S"";
	 this->dtpStartDate->Value = DateTime::Now;
	 this->dtpEndDate->Value = DateTime::Now;
	 this->txtDays->Text = S"0";
	 this->txtRateApplied->Text = S"24.95";
	 this->txtSubTotal->Text = S"0.00";
	 this->txtTaxRate->Text = S"7.75";
	 this->txtTaxAmount->Text = S"0.00";
	 this->txtOrderTotal->Text = S"0.00";
	 this->cboEmployees->Focus();
}

Display the first form, Form1 and complete its design as follows:

Control	Name	Text
Button	btnRentalOrders	Rental Orders
Button	btnEmployees	Employees
Button	btnCustomers	Customers

Double-click the Rental Orders button and implement its Click event as follows:

System::Void btnRentalOrders_Click(System::Object *  sender, System::EventArgs *  e)
{
	 RentalOrders *frmOrders = new RentalOrders;
	 frmOrders->Show();
}

Return to the Form1 form and double-click the Close button

Implement it as follows:

System::Void btnClose_Click(System::Object *  sender, System::EventArgs *  e)
{
	 Close();
}

Execute the application and create a few rental orders
Close the forms and return to your programming environment

Return to the RentalOrders form and double-click the Open button to implement its Click event as follows:

System::Void btnOpen_Click(System::Object *  sender, System::EventArgs *  e)
{
	 ArrayList *lstRentalOrders = new ArrayList;
	 String *strFilename = S"RentalOrders.bcr";
	 SoapFormatter *bcrSoap = new SoapFormatter();
	 CRentalOrder *order;
	 int receiptNumber = this->txtReceiptNumber->Text->ToInt32(0);

	 if( File::Exists(strFilename) )
	 {
 FileStream *bcrStream = new FileStream(strFilename, FileMode::Open, FileAccess::Read, FileShare::Read);
		 lstRentalOrders = dynamic_cast<ArrayList *>(bcrSoap->Deserialize(bcrStream));

		 bcrStream->Close();

		 for(int i = 0; i < lstRentalOrders->Count; i++)
		 {
			 order = dynamic_cast<CRentalOrder *>(lstRentalOrders->Item[i]);

			 if( order->ReceiptNumber == receiptNumber )
			 {
				 this->cboEmployees->Text   = order->ProcessedBy;
				 this->cboCars->Text        = order->CarSelected;
				 this->txtMake->Text        = order->Make;
				 this->txtModel->Text       = order->Model;
				 this->txtCarYear->Text     = order->Year.ToString();
				 this->cboCarConditions->Text = order->CarCondition;
				 this->cboCustomers->Text   = order->CustDrvLicNbr;
				 this->txtCustName->Text    = order->CustName;
				 this->txtCustAddress->Text = order->CustAddress;
				 this->txtCustCity->Text    = order->CustCity;
				 this->txtCustState->Text   = order->CustState;
				 this->txtCustZIPCode->Text = order->CustZIPCode;
				 this->txtCustCountry->Text = order->CustCountry;
				 this->cboTankLevels->Text  = order->TankLevel;
				 this->txtMileage->Text     = order->Mileage.ToString();
				 this->dtpStartDate->Value  = order->StartDate;
				 this->dtpEndDate->Value    = order->EndDate;
				 this->txtDays->Text        = order->Days.ToString();
				 this->txtRateApplied->Text = order->RateApplied.ToString();
				 this->txtSubTotal->Text    = order->SubTotal.ToString();
				 this->txtTaxRate->Text     = order->TaxRate.ToString();
				 this->txtTaxAmount->Text   = order->TaxAmount.ToString();
				 this->txtOrderTotal->Text  = order->OrderTotal.ToString();
			 }
		 }
	 }
	 else
	 {
		 MessageBox::Show(S"There is no rental order with that receipt number!");
		 return;
	 }
}

Execute the application and try opening previous created orders


Previous	Copyright © 2005-2016, FunctionX