File-Based Applications: Bethesda Car Rental

	Bethesda Car Rental: Customers Records

Introduction

The essence of any business is to present or sell products to a customers. These are people or entities that buy what ever is on sale. In our application, we will create simple information about each customer. This information will be stored in a text file and be able to open it when needed. To make our assignment easy, we will use the same approach and steps we used for the employees.

Practical Learning: Creating Customers

To add a new form to the application, on the main menu, click Project -> Add New Item...
In the Templates list of the Add New Item dialog box, click Windows Forms (.NET)
Set the Name to Customers and press Enter
From the Toolbox, add a ListView to the form

While the new list view is still selected, in the Properties window, click the ellipsis button of the Columns field and create the columns as follows:

(Name)	Text	Width
colDrvLicNbr	Driver's Lic. #	100
colFullName	Full Name	100
colAddress	Address	160
colCity	City	100
colState	State	38
colZIPCode	ZIPCode
colCountry	Country

Design the form as follows:

Control	Text	Name	Other Properties
ListView		lvwEmployees	View: Details GridLines: True FullRowSelect: True
Button	New Customer	btnNewCustomer
Button	Close	btnClose

To add another form to the application, on the main menu, click Project -> Add New Item...
In the Templates list of the Add New Item dialog box, click Windows Forms (.NET)
Set the Name to NewCustomer and press Enter

Design the form as follows:

Control	Text	Name	Properties
Label	Driver's Lic. #:
TextBox		txtDrvLicNbr	Modifiers: public
Label	Full Name:
TextBox		txtFullName	Modifiers: public
Label	Address:
TextBox		txtAddress	Modifiers: public
Label	City:
TextBox		txtCity	Modifiers: public
Label	State:
TextBox	MD	txtState	Modifiers: public
Label	ZIP Code:
TextBox		txtZIPCode	Modifiers: public
Label	Country:
TextBox	USA	txtCountry	Modifiers: public
Button	New Customer	btnNewCustomer	DialogResult: OK
Button	Close	btnClose	DialogResult: Cancel
Form			AcceptButton: btnNewCustomer CancelButton: btnClose FormBorderStyle: FixedDialog MaximizeBox: False MinimizeBox: False ShowInTaskbar: False

To add a new class to the project, on the main menu, click Project -> Add Class...
In the Templates list, click Generic C++ Class and click Open
Set the Class Name to CCustomer and click Finish
In the Solution Explorer, double-click Customer.h

Change the Customer.h file as follows:

#pragma once

using namespace System;

[Serializable]
__sealed public __gc class CCustomer
{
public:
	String *DrvLicNbr;
	String *FullName;
	String *Address;
	String *City;
	String *State;
	String *ZIPCode;
	String *Country;

public:
	CCustomer(void);
	CCustomer(String *DrvLic, String *fName, String *adr,
		  String *ct, String *ste, String *zip, String *cty);
	~CCustomer(void);
};

Change the Customer.cpp file as follows:

#include "StdAfx.h"
#include ".\customer.h"
#using <mscorlib.dll>

CCustomer::CCustomer(void)
{
	DrvLicNbr = S"A-000-000-000-000";
	FullName  = S"John Doe";
	Address   = S"123 Main Street";
	City      = S"Good City";
	State     = S"MD";
	ZIPCode   = S"20900";
	Country   = S"USA";
}

CCustomer::CCustomer(String *DrvLic, String *fName, String *adr,
		     String *ct, String *ste, String *zip, String *cty)
{
	DrvLicNbr = DrvLic;
	FullName  = fName;
	Address   = adr;
	City      = ct;
	State     = ste;
	ZIPCode   = zip;
	Country   = cty;
}

CCustomer::~CCustomer(void)
{
}

In the Class View, expand BCR2 and BCR2
Right-click Employees -> Add -> Add Function...
Set the Return Type to void
Set the Function Name to ShowCustomers and its Access to private
Click Finish
Return to the Customers form and double-click an empty area of its body to generate its Load event
Return to the Customers form and double-click its Close button
Return to the Customers form and double-click its New Customer button

Change the file as follows:

#pragma once

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

#include "NewCustomer.h"
#include "Customer.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
{
	. . .
	
	public __gc class Customers : public System::Windows::Forms::Form
	{

	. . .

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

		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			. . . 
		}		
	
void ShowCustomers(void)
{
	 SoapFormatter *bcrSoap = new SoapFormatter();
	 String *strFilename = S"Customers.bcr";
			 
	 if( File::Exists(strFilename) )
	 {
		FileStream *bcrStream = new FileStream(strFilename, FileMode::Open, 
							FileAccess::Read, FileShare::Read);
		 ArrayList *lstCust = 
			dynamic_cast<ArrayList *>(bcrSoap->Deserialize(bcrStream));

		 bcrStream->Close();

		 CCustomer* cust;

		 lvwCustomers->Items->Clear();

		 for(int i = 0; i < lstCust->Count; i++)
		 {
			 cust = dynamic_cast<CCustomer *>(lstCust->Item[i]);
			 ListViewItem *lviCustomer = new ListViewItem(cust->DrvLicNbr);
			 lviCustomer->Font = new 
				Drawing::Font("Georgia", 8, FontStyle::Bold);
		 
			 if( i % 2 == 0 )
		 {
			 lviCustomer->BackColor = Color::Blue;
			 lviCustomer->ForeColor = Color::White;
		 }
		 else
		 {
			 lviCustomer->BackColor = Color::LightBlue;
			 lviCustomer->ForeColor = Color::Blue;
		 }

			 lviCustomer->SubItems->Add(cust->FullName);
			 lviCustomer->SubItems->Add(cust->Address);
			 lviCustomer->SubItems->Add(cust->City);
			 lviCustomer->SubItems->Add(cust->State);
			 lviCustomer->SubItems->Add(cust->ZIPCode);
			 lviCustomer->SubItems->Add(cust->Country);
			 lvwCustomers->Items->Add(lviCustomer);
		 }
	 }
}

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

		 bcrStream->Close();
	 }

	 ShowCustomers();
		 }

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

private: System::Void btnNewCustomer_Click(System::Object *  sender, System::EventArgs *  e)
{
	 NewCustomer *dlgCust = new NewCustomer;
				 
	 if( dlgCust->ShowDialog() == DialogResult::OK )
	 {
		 String *strFilename = S"Customers.bcr";
		 CCustomer *cust = new CCustomer;

		 cust->DrvLicNbr = dlgCust->txtDrvLicNbr->Text;
		 cust->FullName  = dlgCust->txtFullName->Text;
		 cust->Address   = dlgCust->txtAddress->Text;
		 cust->City      = dlgCust->txtCity->Text;
		 cust->State     = dlgCust->txtState->Text;
		 cust->ZIPCode   = dlgCust->txtZIPCode->Text;
		 cust->Country   = dlgCust->txtCountry->Text;

		 lstCustomers->Add(cust);
			 
		 FileStream *bcrStream = new FileStream(strFilename, 
							FileMode::OpenOrCreate, 
							FileAccess::Write, 
							FileShare::Write);
		 SoapFormatter *bcrSoap = new SoapFormatter();
		 bcrSoap->Serialize(bcrStream, lstCustomers);
		 bcrStream->Close();
						 
		 ShowCustomers();
	 }
}

};
}

Display the first form, Form1.h [Design]. Add a Button to the form and change its properties as follows:
(Name): btnCustomers
Text: Customers
Double-click the Employees button to generate its Click event
In the top section of the file and under the #pragma once line, type

#include "Customers.h"

Implement the event as follows:

System::Void btnCustomers_Click(System::Object *  sender, System::EventArgs *  e)
{
	 Customers *frmCust = new Customers;

	 frmCust->Show();
}

Execute the application

Create a few employees as follows:

Driver's Lic. #	Full Name	Address	City	State	ZIP Code
M-505-862-575	Lynda Melman	4277 Jamison Ave	Silver Spring		20904
379-82-7397	John Villard	108 Hacken Rd NE	Washington	DC	20012
J-938-928-274	Chris Youno	8522 Aulage Street	Rockville		20852
K-497-220-614	Pamela Ulmreck	12075 Famina Rd	Hyattsville	MD	20707
922-71-8395	Helene Kapsco	806 Hyena Drive	Alexandria	VA	22231
C-374-830-422	Hermine Crasson	6255 Old Georgia Ave	Silver Spring		20910
836-55-2279	Alan Pastore	4228 16th Street NW	Washington	DC	20004
B-397-597-487	Phillis Buster	724 Cranston Circle	College Park		20747
K-115-802-957	Elmus Krazucki	808 Rasters Ave	Chevy Chase	MD	20852
294-90-7744	Helena Weniack	10448 Great Pollard Hwy	Arlington	VA	22232

Close the forms and return to your programming environment


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