File-Based Applications: Bethesda Car Rental

	File-Based Applications: Bethesda Car Rental

Cars

Cars are at the center of the rental transactions of our company. A car is the main reason a customer comes to the business. In our application, we will provide all the necessary information related to a car such as its make, model, year, picture, and whether it is available. Because we know that sometimes when renting or choosing a car, a customer may want to know the options available on a particular car, we will also list these basic pieces of information. Finally, we will mark a car as available or not. This will allow the clerk processing an order to know whether the customer can rent the car or not.

We will create two forms related to cars. One form will be used to enter a new car when the company acquires one. On the other hand, when interviewing a customer, if the clerk wants to see a list of the company cars, we will create a form that can help with this, allowing the clerk to navigate among cars for a review.

Practical Learning: Processing Cars

Copy the following pictures to the debug sub-folder of the bin sub-folder inside the main folder of the current project (Save them with their default names):
Return to your programming environment
To add a new form to the application, on the main menu, click Project -> Add Windows Forms
Set the Name to NewCar and press Enter

Design the form as follows:

Control	Text	Name	Other Properties
Label	Text #
TextBox		txtTagNumber
Label	Make:
TextBox		txtMake
Label	Model:
TextBox		txtModel
Label	Year:
TextBox		txtYear
Label	Category:
ComboBox		cboCategory	DropDownStyle: DropDownList
ComboBox		cboCategory	Items:	Economy Compact Standard Full Size Mini Van SUV Truck Van
CheckBox	Cassete Player	chkK7Player	CheckAlign: MiddleRight
CheckBox	DVD Player	chkDVDPlayer	CheckAlign: MiddleRight
CheckBox	CD Player	chkCDPlayer	CheckAlign: MiddleRight
CheckBox	Available	chkAvailable	CheckAlign: MiddleRight
PictureBox		pctCar	SizeMode: CenterImage
Label	Select Car Picture:
ComboBox	none.gif	cboPictures
Button	Add Car	btnAddCar
Button	Close	btnClose	DialogResult: OK
Form			FormBorderStyle: FixedDialog MaximizeBox: False MinimizeBox: False ShowInTaskbar: False

To add a new class to the project, on the main menu, click Project -> Add Class...
Set the Class Name to Car and click Open

Access the Car.cs file and change it as follows:

using System;

namespace BCR2
{
	/// <summary>
	/// Summary description for Car.
	/// </summary>
	[Serializable]
	sealed public class Car
	{
		public string TagNumber;
		public string Make;
		public string Model;
		public int    Year;
		public string Category;
		public int    HasK7Player;
		public int    HasCDPlayer;
		public int    HasDVDPlayer;
		public string PictureName;
		public int    IsAvailable;
		
		public Car()
		{
			TagNumber    = "000-000";
			Make         = "Make";
			Model        = "Model";
			Year         = 1960;
			Category     = "Small";
			HasK7Player  = 0;
			HasCDPlayer  = 0;
			HasDVDPlayer = 0;
			PictureName  = "";
			IsAvailable  = 0;
		}
						 
		public Car(string tag, string mk, string mdl, 
			int yr, string cat, int k7, int cd,
			int dvd, string pct, int avl)
		{	
			TagNumber    = tag;
			Make         = mk;
			Model        = mdl;
			Year         = yr;
			Category     = cat;
			HasK7Player  = k7;
			HasCDPlayer  = cd;
			HasDVDPlayer = dvd;
			PictureName  = pct;
			IsAvailable  = avl;
		}
	}
}

Display the NewCar form. Right-click it and click View Code

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

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.IO;
using System.Runtime.Serialization.Formatters.Soap;

namespace BCR2
{

Declare an ArrayList variable and name it lstCars:

private System.ComponentModel.Container components = null;
ArrayList lstCars;

Return to the NewCar form. Double-click an unoccupied area of its body to generate its Load event and implement it as follows:

private void NewCar_Load(object sender, System.EventArgs e)
{
	lstCars = new ArrayList();
	string strFilename = "Cars.bcr";
	SoapFormatter bcrSoap = new SoapFormatter();
			 
	if( File.Exists(strFilename) )
	{
		FileStream bcrStream = new FileStream(strFilename, 
			FileMode.Open, FileAccess.Read, FileShare.Read);
		lstCars = (ArrayList)bcrSoap.Deserialize(bcrStream);
		bcrStream.Close();
	}
	else
	{
		FileStream bcrStream = new FileStream(strFilename, 
				FileMode.OpenOrCreate, FileAccess.Write, 
				FileShare.Write);
		bcrSoap.Serialize(bcrStream, lstCars);
		bcrStream.Close();
	}

	// Locate the director that contains the current application
	DirectoryInfo dirInfo = new DirectoryInfo(".\\");

	// Get a reference to each file in that directory
	FileInfo[] lstFiles = dirInfo.GetFiles();

		// Display the names of the graphics files
		foreach(FileInfo fi in lstFiles)
		{
			if( fi.Extension.Equals(".gif") ||
				fi.Extension.Equals(".jpeg") ||
				fi.Extension.Equals(".jpg") ||
				fi.Extension.Equals(".bmp") ||
				fi.Extension.Equals(".png") )
				cboPictures.Items.Add(fi.Name);
		}

	cboPictures.Text = "none.gif";
}

Return to the NewCar form and double-click the combo box on then right side of Select Car Picture

Implement its SelectedIndexChanged event as follows:

private void cboPictures_SelectedIndexChanged(object sender, 
		System.EventArgs e)
{
	this.pctCar.Image = Image.FromFile(cboPictures.Text);
}

Return to the NewCar form and double-click the Add Car button to generate its Click event

Implement it as follows:

private void btnAddCar_Click(object sender, System.EventArgs e)
{
	Car vehicle = new Car();

	vehicle.TagNumber = this.txtTagNumber.Text;
	vehicle.Make      = this.txtMake.Text;
	vehicle.Model     = this.txtModel.Text;
	vehicle.Year      = int.Parse(this.txtYear.Text);
	vehicle.Category  = this.cboCategory.Text;
	if( this.chkK7Player.Checked == true )
		vehicle.HasK7Player  = 1;
	else
		vehicle.HasK7Player  = 0;
	if( this.chkCDPlayer.Checked == true )
		vehicle.HasCDPlayer  = 1;
	else
		vehicle.HasCDPlayer  = 0;
	if( this.chkDVDPlayer.Checked == true )
		vehicle.HasDVDPlayer = 1;
	else
		vehicle.HasDVDPlayer = 0;
	vehicle.PictureName  = cboPictures.Text;
	if( this.chkAvailable.Checked == true )
		vehicle.IsAvailable  = 1;
	else
		vehicle.IsAvailable  = 0;

	lstCars.Add(vehicle);

	string strFilename = "Cars.bcr";
	SoapFormatter bcrSoap = new SoapFormatter();
	FileStream bcrStream = new FileStream(strFilename, 
		FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write);
	bcrSoap.Serialize(bcrStream, lstCars);
	bcrStream.Close();

	this.txtTagNumber.Text = "";
	this.txtMake.Text      = "";
	this.txtModel.Text     = "";
	this.txtYear.Text      = "1960";
	this.cboCategory.SelectedIndex = 0;
	this.chkK7Player.Checked = false;
	this.chkCDPlayer.Checked  = false;
	this.chkDVDPlayer.Checked = false;
	cboPictures.Text = "none.gif";			 
	this.chkAvailable.Checked = false;
	this.pctCar.Image = Image.FromFile("none.gif");
	this.txtTagNumber.Focus();
}

Display the first form, Switchboard.cs [Design]. Add a Button to the form and change its properties as follows:
(Name): btnNewCar
Text: New Car
Double-click the New Car button to generate its Click event

Implement the event as follows:

private void btnNewCar_Click(object sender, System.EventArgs e)
{
	NewCar car = new NewCar();
	car.ShowDialog();
}

Execute the application
Create a few cars as follows:
Close the forms and return to your programming environment
To add a new form to the application, on the main menu, click Project -> Add Windows Forms
Set the Name to Cars and press Enter

Design the form as follows:

Control	Text	Name	Other Properties
Label	Make:
TextBox		txtMake
Label	Model:
TextBox		txtModel
Label	Year:
TextBox		txtYear
Label	Category:
TextBox		txtCategory
CheckBox	Cassete Player	chkK7Player	CheckAlign: MiddleRight
CheckBox	DVD Player	chkDVDPlayer	CheckAlign: MiddleRight
CheckBox	CD Player	chkCDPlayer	CheckAlign: MiddleRight
CheckBox	Available	chkAvailable	CheckAlign: MiddleRight
Label	Tag #:
TextBox		txtTagNumber
PictureBox		pctCar
Button	First	btnFirst
Button	Previous	btnPrevious
Button	Next	btnNext
Button	Last	btnLast
Button	Close	btnClose
Form			MaximizeBox: False StartPosition: CenterScreen

Right-click it and click View Code

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

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.IO;
using System.Runtime.Serialization.Formatters.Soap;

namespace BCR2
{

In the class, declare an ArrayList and name it lstCars:

private System.ComponentModel.Container components = null;
ArrayList lstCars;
int CurrentPosition;

Return to the Cars form and double-click an empty area of its body

Implement the event as follows:

private void Cars_Load(object sender, System.EventArgs e)
{
	lstCars = new ArrayList();
	CurrentPosition = 0;
	 
	string strFilename = "Cars.bcr";
	SoapFormatter bcrSoap = new SoapFormatter();

	if( File.Exists(strFilename) )
	{
		FileStream bcrStream = new FileStream(strFilename, 
FileMode.Open, FileAccess.Read, FileShare.Read);
		lstCars = (ArrayList)bcrSoap.Deserialize(bcrStream);

		bcrStream.Close();
		this.btnFirst_Click(sender, e);
	}
}

void ShowCarInformation(Car vehicle)
{
	this.txtTagNumber.Text = vehicle.TagNumber;
	this.txtMake.Text = vehicle.Make;
	this.txtModel.Text = vehicle.Model;
	this.txtYear.Text  = vehicle.Year.ToString();
	this.txtCategory.Text  = vehicle.Category;

	if( vehicle.HasK7Player == 1 )
		this.chkK7Player.Checked = true;
	else
		this.chkK7Player.Checked = false;

	if( vehicle.HasCDPlayer == 1 )
		this.chkCDPlayer.Checked = true;
	else
		this.chkCDPlayer.Checked = false;

	if( vehicle.HasDVDPlayer == 1 )
		this.chkDVDPlayer.Checked = true;
	else 
		this.chkDVDPlayer.Checked = false;

	string strPictureName = vehicle.PictureName;

	try 
	{
		this.pctCar.Image = 
			Image.FromFile(vehicle.PictureName);
	}
	catch(OutOfMemoryException)
	{
		this.pctCar.Image = Image.FromFile("none.gif");
	}

	if( vehicle.IsAvailable == 1 )
		this.chkAvailable.Checked = true;
	else
		this.chkAvailable.Checked = false;
}

Return to the Cars form and double-click the First button

Implement its Click event as follows:

private void btnFirst_Click(object sender, System.EventArgs e)
{
	if( lstCars.Count == 0 )
		return;
			 
	CurrentPosition = 0;
	Car car = new Car();

	car = (Car)this.lstCars[CurrentPosition];

	ShowCarInformation(car);
}

Return to the Cars form

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

private void btnPrevious_Click(object sender, System.EventArgs e)
{
	if( lstCars.Count == 0 )
		return;
			 
	if( CurrentPosition == 0 )
		return;
	 
	CurrentPosition--;
	Car vehicle = new Car();

	vehicle = (Car)lstCars[CurrentPosition];

	ShowCarInformation(vehicle);
}

Return to the Cars form. Double-click the Next button and implement its Click event as follows:

private void btnNext_Click(object sender, System.EventArgs e)
{
	if( lstCars.Count == 0 )
		 return;

	 if( CurrentPosition == lstCars.Count - 1 )
		 return;
	 else
	 {
		 CurrentPosition++;
	 
		 Car vehicle = new Car();

		 vehicle = (Car)lstCars[CurrentPosition];

		ShowCarInformation(vehicle);
	 }
}

Return to the Cars form. Double-click the Last button and implement its Click event as follows:

private void btnLast_Click(object sender, System.EventArgs e)
{
	if( lstCars.Count == 0 )
		return;
			 
	CurrentPosition = lstCars.Count - 1;
	Car vehicle = new Car();

	vehicle = (Car)this.lstCars[CurrentPosition];

	ShowCarInformation(vehicle);
}

Return to the Cars form. Double-click the Close button and implement its Click event as follows:
private void btnClose_Click(object sender, System.EventArgs e) { Close(); }
Display the first form, Switchboard.cs [Design]. Add a Button to the form and change its properties as follows:
(Name): btnCarsReview
Text: Car Review
Double-click the New Car button to generate its Click event

Implement the event as follows:

private void btnCarsReview_Click(object sender, System.EventArgs e)
{
	Cars frmCars = new Cars();
	frmCars.Show();
}

Execute the application and review the list of cars using the Cars form
Close the forms and return to your programming environment

Rental Orders

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 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...
Set the Class Name to RentalOrder and press Enter

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

using System;

namespace BCR2
{
	/// <summary>
	/// Summary description for RentalOrder.
	/// </summary>
	[Serializable]
	sealed public class RentalOrder
	{
		public int      ReceiptNumber;
		public string  ProcessedBy;
		public string  CarSelected;
		public string  Make;
		public string  Model;
		public int	 Year;
		public string  CarCondition;
		public string  CustDrvLicNbr;
		public string  CustName;
		public string  CustAddress;
		public string  CustCity;
		public string  CustState;
		public string  CustZIPCode;
		public string  CustCountry;
		public string  TankLevel;
		public long     Mileage;
		public DateTime StartDate;
		public DateTime EndDate;
		public int      Days;
		public decimal  RateApplied;
		public decimal  SubTotal;
		public decimal  TaxRate;
		public decimal  TaxAmount;
		public decimal  OrderTotal;

		public RentalOrder()
		{
			//
			// TODO: Add constructor logic here
			//
		}
	}
}

To add a new form to the project, on the main menu, click Project -> Add 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:

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.IO;
using System.Runtime.Serialization.Formatters.Soap;

namespace BCR2
{

In the class, declare a variable of type ArrayList named lstRentalOrders

private System.ComponentModel.Container components = null;
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:

private void RentalOrders_Load(object sender, System.EventArgs e)
{
	lstRentalOrders = new ArrayList();
	 ArrayList lstEmployees = new ArrayList();
	 SoapFormatter bcrSoap = new SoapFormatter();
	 string strFilename = "Employees.bcr";
			 
	 if( File.Exists(strFilename) )
	 {
FileStream bcrStream = new FileStream(strFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
		 lstEmployees = (ArrayList)bcrSoap.Deserialize(bcrStream);
		 bcrStream.Close();

		 string firstName, lastName, title;

		 cboEmployees.Items.Clear();

		 foreach(Employee empl in lstEmployees)
		 {
			 firstName = empl.FirstName;
			 lastName  = empl.LastName;
			 title     = empl.Title;
			 
			 cboEmployees.Items.Add(String.Concat(lastName, ", ", firstName, " - ", title));
		 }
	 }

	 strFilename = "Cars.bcr";
	 ArrayList lstCars = new ArrayList();

	 if( File.Exists(strFilename) )
	 {
FileStream bcrStream = new FileStream(strFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
		 lstCars = (ArrayList)bcrSoap.Deserialize(bcrStream);
		 bcrStream.Close();

		 cboCars.Items.Clear();

		 foreach(Car vehicle in lstCars)
			 cboCars.Items.Add(vehicle.TagNumber);
	 }

	 strFilename = "Customers.bcr";
	 ArrayList lstCustomers = new ArrayList();
			 
	 if( File.Exists(strFilename) )
	 {
FileStream bcrStream = new FileStream(strFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
		 lstCustomers = (ArrayList)bcrSoap.Deserialize(bcrStream);
		 bcrStream.Close();

		 cboCustomers.Items.Clear();

		 foreach(Customer cust in lstCustomers)
			 cboCustomers.Items.Add(cust.DrvLicNbr);
	 }
}

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

private void cboCars_SelectedIndexChanged(object sender, System.EventArgs e)
{
	string strFilename = "Cars.bcr";
	ArrayList lstCars = new ArrayList();
	SoapFormatter bcrSoap = new SoapFormatter();

FileStream bcrStream = new FileStream(strFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
	lstCars = (ArrayList)bcrSoap.Deserialize(bcrStream);
	bcrStream.Close();

	foreach(Car vehicle in lstCars)
	{
		if( vehicle.TagNumber == cboCars.Text )
		{
			this.txtMake.Text    = vehicle.Make;
			this.txtModel.Text   = vehicle.Model;
			this.txtCarYear.Text = vehicle.Year.ToString();
			return;
		}
	}
}

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

private void cboCustomers_SelectedIndexChanged(object sender, System.EventArgs e)
{
	string strFilename = "Customers.bcr";
	ArrayList lstCustomers = new ArrayList();
	SoapFormatter bcrSoap = new SoapFormatter();

FileStream bcrStream = new FileStream(strFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
	lstCustomers = (ArrayList)(bcrSoap.Deserialize(bcrStream));
	bcrStream.Close();

	foreach(Customer cust in lstCustomers)
	{
		if( cust.DrvLicNbr == 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:

private void btnRateApplied_Click(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:

private void dtpEndDate_ValueChanged(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:

private void txtRateApplied_Leave(object sender, System.EventArgs e)
{
	int days = int.Parse(this.txtDays.Text);
	decimal rateApplied = decimal.Parse(this.txtRateApplied.Text);
	decimal subTotal = days * rateApplied;
	this.txtSubTotal.Text = subTotal.ToString("F");
	decimal taxRate = decimal.Parse(this.txtTaxRate.Text);
	decimal taxAmount = subTotal * taxRate / 100;
	this.txtTaxAmount.Text = taxAmount.ToString("F");
	decimal totalOrder = subTotal + taxAmount;
	this.txtOrderTotal.Text = totalOrder.ToString("F");
}

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

private void btnSave_Click(object sender, System.EventArgs e)
		{
			int receiptNumber = 0;
		ArrayList lstRentalOrders = new ArrayList();
		string strFilename = "RentalOrders.bcr";
		SoapFormatter bcrSoap = new SoapFormatter();

		if( File.Exists(strFilename) )
	{
		FileStream bcrStream = new FileStream(strFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
		lstRentalOrders = (ArrayList)bcrSoap.Deserialize(bcrStream);

		RentalOrder order = (RentalOrder)lstRentalOrders[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();
}

	RentalOrder rntOrder = new RentalOrder();

	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			 = int.Parse(this.txtCarYear.Text);
	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		 = long.Parse(this.txtMileage.Text);
	rntOrder.StartDate	 = this.dtpStartDate.Value;
	rntOrder.EndDate		 = this.dtpEndDate.Value;
	rntOrder.Days			 = int.Parse(this.txtDays.Text);
	rntOrder.RateApplied	 = decimal.Parse(this.txtRateApplied.Text);
	rntOrder.SubTotal		 = decimal.Parse(this.txtSubTotal.Text);
	rntOrder.TaxRate		 = decimal.Parse(this.txtTaxRate.Text);
	rntOrder.TaxAmount	 = decimal.Parse(this.txtTaxAmount.Text);
	rntOrder.OrderTotal	 = decimal.Parse(this.txtOrderTotal.Text);
			 
	lstRentalOrders.Add(rntOrder);

FileStream stmOrders = new FileStream(strFilename, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write);
	bcrSoap.Serialize(stmOrders, lstRentalOrders);
	stmOrders.Close();

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

Display the first form, Switchboard, 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:

private void btnRentalOrders_Click(object sender, System.EventArgs e)
{
	RentalOrders frmOrders = new RentalOrders();
	frmOrders.Show();
}

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

Implement it as follows:

private void btnClose_Click(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:

private void btnOpen_Click(object sender, System.EventArgs e)
{
	ArrayList lstRentalOrders = new ArrayList();
	string strFilename = "RentalOrders.bcr";
	SoapFormatter bcrSoap = new SoapFormatter();
	int receiptNumber = int.Parse(this.txtReceiptNumber.Text);

	if( File.Exists(strFilename) )
	{
FileStream bcrStream = new FileStream(strFilename, FileMode.Open, FileAccess.Read, FileShare.Read);
		lstRentalOrders = (ArrayList)bcrSoap.Deserialize(bcrStream);

		bcrStream.Close();

		foreach(RentalOrder order in lstRentalOrders)
		{
			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("There is no rental order with that receipt number!");
		return;
	}
}

Return to the Rental Orders form and double-click the Close button

Implement its Click event as follows:

private void btnClose_Click(object sender, System.EventArgs e)
{
	Close();
}

Execute the application and try opening previous created orders


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