Microsoft Windows Networking: Creating a Client Server Application

	Creating a Client Server Application

Practical Learning: Processing Orders

To add a new class to the project, in the Class View, right-click BethesdaCarRental1 -> Add -> Class...

Set the Class Name to RentalOrder and press Enter

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

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace BethesdaCarRental1
{
    [Serializable]
    public class RentalOrder
    {
        public string EmployeeNumber;
        // The following flag will allow us to update/know whether
        // * The car is currently being used by the customer.
        //   That is, if the car has been picked up by the customer
        // * The customer has brought the car back
        public string OrderStatus;
        // Because every car has a tag number
        // and that tag number will not change
        // during the lifetime of a car (while the car remains with our
        // car rental company, we will 
        // use only the tag number here.
        // The other pieces of information will 
        // be retrieved from the list of cars
        public string CarTagNumber;
        // We will identify the customer by the number
        // and the name on his or her driver's license
        public string CustomerDrvLicNbr;
        public string CustomerName;
        // Although he or she may keep the same driver's 
        // license number for a lifetime, a customer who 
        // rents cars at different times with this company 
        // over months or years may have different addresses.
        // Therefore, although we will primarily retrieve the 
        // customer's address from the list of customers,
        // we will give the clerk the ability to change this 
        // information on a rental order. This means that the 
        // same customer could have different information on 
        // different rental orders.
        // For this reason, each rental order will its own set
        // of these pieces of information
        public string CustomerAddress;
        public string CustomerCity;
        public string CustomerState;
        public string CustomerZIPCode;
        public string CarCondition;
        public string TankLevel;
        // This information will be entered when the car is being rented
        public int MileageStart;
        // This information will be entered when the car is brought back
        public int MileageEnd;
        // This information will be entered when the car is being rented
        public DateTime DateStart;
        // This information will be entered when the car is brought back
        public DateTime DateEnd;
        public int Days;
        // This information will be entered when the car is being rented
        public double RateApplied;
        // This calculation should occur when the car is brought back
        public double SubTotal;
        public double TaxRate;
        public double TaxAmount;
        public double OrderTotal;
    }
}

To add a new form to the project, in the Solution Explorer, right-click BethesdaCarRenat1 -> Add -> Windows Form...

Set the Name to OrderProcessing and press Enter

Display the Central form

Double-click the Rental Orders button

Implement its event as follows:

private void btnRentalOrders_Click(object sender, EventArgs e)
{
    OrderProcessing dlgOrder = new OrderProcessing();
    dlgOrder.ShowDialog();
}

Return to the Central form

Double-click the Close button

Implement the event as follows:

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

Display the Order Processing form

Design the form as follows:

Control	Text	Name	Other Properties
Label	Processed By:		AutoSize: False BackColor: Gray BorderStyle: FixedSingle ForeColor: White TextAlign: MiddleLeft
Label	Employee #:
MaskedTextBox		txtEmployeeNumber	Mask: 00-000
Label	Employee Name:
TextBox		txtEmployeeName
Label	Processed For		AutoSize: False BackColor: Gray BorderStyle: FixedSingle ForeColor: White TextAlign: MiddleLeft
Label	Driver's Lic #:
TextBox		txtDrvLicNumber
Label	Cust Name:
TextBox		txtCustomerName
Label	Address:
TextBox		txtCustomerAddress
Label	City:
TextBox		txtCustomerCity
Label	State:
ComboBox		cbxCustomerStates	DropDownStyle: DropDownList Sorted: True Items: AL, AK, AZ, AR, CA, CO, CT, DE, DC, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY
Label	ZIP Code
TextBox		txtCustomerZIPCode
Label	Car Selected		AutoSize: False BackColor: Gray BorderStyle: FixedSingle ForeColor: White TextAlign: MiddleLeft
Label	Tag Number:
TextBox		txtTagNumber
Label	Car Condition:
ComboBox		cbxCarConditions	Sorted: True Items: Needs Repair Drivable Excellent
Label	Make:
TextBox		txtMake
Label	Model:
TextBox		txtModel
Label	Year:
TextBox		txtCarYear
label	Tank Level:
ComboBox		cbxTankLevels	Empty 1/4 Empty 1/2 Full 3/4 Full Full
Label	Mileage Start:
TextBox		txtMileageStart	TextAlign: Right
Label	Mileage End:
TextBox		txtMileageEnd	TextAlign: Right
Label	Order Timing		AutoSize: False BackColor: Gray BorderStyle: FixedSingle ForeColor: White TextAlign: MiddleLeft
Label	Start Date:
DateTimePicker		dtpStartDate
Label	End Date:
DateTimePicker		dtpEndDate
Label	Days:
TextBox	0	txtDays	TextAlign: Right
Label	Order Status
ComboBox		cbxOrderStatus	Items: Car On Road Car Returned Order Reserved
Label	Order Evaluation		AutoSize: False BackColor: Gray BorderStyle: FixedSingle ForeColor: White TextAlign: MiddleLeft
Label	Rate Applied:
TextBox	0.00	txtRateApplied	TextAlign: Right
Button	Rental Rates	btnRentalRates
Label	Sub-Total:
TextBox	0.00	txtSubTotal	TextAlign: Right
Button	Calculate	btnCalculate
Label	Tax Rate:
TextBox	7.75	txtTaxRate	TextAlign: Right
Label	%
Button	Save	btnSave
Label	Tax Amount:
TextBox	0.00	txtTaxAmount	TextAlign: Right
Button	Print...	btnPrint
Label	Order Total:
TextBox	0.00	txtOrderTotal	TextAlign: Right
Button	Print Preview...	btnPrintPreview
Label	Receipt #:
TextBox	0	txtReceiptNumber
Button	Open	btnOpen
Button	New Rental Order/Reset	btnNewRentalOrder
Button	Close	btnClose

To add a new form to the project, in the Solution Explorer, right-click BethesdaCarRental1 -> 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	SubItems	SubItems	SubItems	SubItems
	Text	Text	Text	Text
Economy	35.95	32.75	28.95	24.95
Compact	39.95	35.75	32.95	28.95
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:

Rental Rates

In the Solution Explorer, right-click OrderProcessing.cs and click View Code

Make the following changes:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

namespace BethesdaCarRental1
{
    public partial class OrderProcessing : Form
    {
        int ReceiptNumber;
        Dictionary<int, RentalOrder> ListOfRentalOrders;

        public OrderProcessing()
        {
            InitializeComponent();
        }
    }
}

On the Order Processing form, click the Employee Number text box

In the Events section of the Properties window, double-click Leave and implement the event as follows:

private void txtEmployeeNumber_Leave(object sender, EventArgs e)
{
    Employee clerk;
    string strEmployeeNumber = txtEmployeeNumber.Text;

    if (strEmployeeNumber.Length == 0)
    {
        MessageBox.Show("You must enter the employee's number",
                        "Bethesda Car Rental",
                        MessageBoxButtons.OK, MessageBoxIcon.Information);
        txtEmployeeNumber.Focus();
        return;
    }

    Dictionary<string, Employee> LstOfEmployees = 
    	new Dictionary<string, Employee>();
    BinaryFormatter bfmEmployees = new BinaryFormatter();

    string strFilename = @"\\EXPRESSION\Bethesda Car Rental\Employees.cre";

    if (File.Exists(strFilename))
    {
        FileStream stmEmployees = new FileStream(strFilename,
                                                 FileMode.Open,
                                                 FileAccess.Read,
                                                 FileShare.Read);
        try
        {
            // Retrieve the list of employees
            LstOfEmployees = (Dictionary<string, 
            		Employee>)bfmEmployees.Deserialize(stmEmployees);

            if (LstOfEmployees.TryGetValue(strEmployeeNumber, out clerk))
            {
                txtEmployeeName.Text = clerk.FullName;
            }
            else
            {
                txtEmployeeName.Text = "";
                MessageBox.Show("There is no employee with that number",
                                "Bethesda Car Rental",
                                MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
        }
        finally
        {
            stmEmployees.Close();
        }
    }
}