Microsoft Windows Networking: Creating a Client Server Application

	Creating a Client Server Application

Practical Learning: Creating Cars

To add a new class to the project, in the Class View, right-click BethedaCarRental1 -> Add -> Class...
Set the Class Name to Car and click Add

Change the file as follows:

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

namespace BethesdaCarRental1
{
    [Serializable]
    public class Car
    {
        public string Make;
        public string Model;
        public int Year;
        public string Category;
        public bool HasCDPlayer;
        public bool HasDVDPlayer;
        public bool IsAvailable;

        public Car(string mk = "Good", string mdl = "Special",
                   int yr = 1960, string cat = "Unknown", bool cd = false,
                   bool dvd = false, bool avl = false)
        {
            Make = mk;
            Model = mdl;
            Year = yr;
            Category = cat;
            HasCDPlayer = cd;
            HasDVDPlayer = dvd;
            IsAvailable = avl;
        }
    }
}

To add a new form to the application, in the Solution Explorer, right-click BethesdaCarRental1 -> Add -> Windows Forms
Set the Name to CarEditor and click Add

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		cboCategories	DropDownStyle: DropDownList
ComboBox		cboCategories	Items:	Economy Compact Standard Full Size Mini Van SUV Truck Van
PictureBox		pbxCar	SizeMode: Zoom
CheckBox	CD Player	chkCDPlayer	CheckAlign: MiddleRight
CheckBox	DVD Player	chkDVDPlayer	CheckAlign: MiddleRight
Button	Select Car Picture...	btnSelectPicture
CheckBox	Available	chkAvailable	CheckAlign: MiddleRight
Label	Picture Name	lblPictureName
Button	Submit	btnSubmit
Button	Close	btnClose	DialogResult: Cancel
OpenFileDialog	(Name): dlgOpen Title: Select Item Picture DefaultExt: jpg Filter: JPEG Files (.jpg,.jpeg)\|.jpg\|GIF Files (.gif)\|.gif\|Bitmap Files (.bmp)\|.bmp\|PNG Files (.png)\|*.png
Form			FormBorderStyle: FixedDialog MaximizeBox: False MinimizeBox: False ShowInTaskbar: False

Double-click the Select Car Picture button and implement its event as follows:

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 CarEditor : Form
    {
        Dictionary<string, Car> ListOfCars;

        public CarEditor()
        {
            InitializeComponent();
        }

        private void btnSelectPicture_Click(object sender, EventArgs e)
        {
            if (dlgPicture.ShowDialog() == DialogResult.OK)
            {
                lblPictureName.Text = dlgPicture.FileName;
                pbxCar.Image = Image.FromFile(lblPictureName.Text);
            }
        }
    }
}

Return to the Car Editor form

Double-click an unoccupied area of the form

Implement the Load event as follows:

private void CarEditor_Load(object sender, EventArgs e)
{
    Car vehicle = new Car();
    BinaryFormatter bfmCars = new BinaryFormatter();

    string FileName = @"\\EXPRESSION\Bethesda Car Rental\Cars.crs";
    lblPictureName.Text = ".";

    if (File.Exists(FileName))
    {
        FileStream stmCars = new FileStream(FileName,
                                            FileMode.Open,
                                            FileAccess.Read,
                                            FileShare.Read);
        try
        {
            // Retrieve the list of cars
            ListOfCars = (Dictionary<string, Car>)bfmCars.Deserialize(stmCars);
        }
        finally
        {
            stmCars.Close();
        }
    }
    else
        ListOfCars = new Dictionary<string, Car>();
}

Return to the Car Editor form

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

private void btnSubmit_Click(object sender, EventArgs e)
{
    Car vehicle = new Car();
    FileStream stmCars = null;
    BinaryFormatter bfmCars = new BinaryFormatter();
    string strFilename = @"\\EXPRESSION\Bethesda Car Rental\Cars.crs";

    if (txtTagNumber.Text.Length == 0)
    {
        MessageBox.Show("You must enter the car's tag number");
        return;
    }

    if (txtMake.Text.Length == 0)
    {
        MessageBox.Show("You must specify the car's manufacturer");
        return;
    }

    if (txtModel.Text.Length == 0)
    {
        MessageBox.Show("You must enter the model of the car");
        return;
    }

    if (txtYear.Text.Length == 0)
    {
        MessageBox.Show("You must enter the year of the car");
        return;
    }

    // Create a car
    vehicle.Make = txtMake.Text;
    vehicle.Model = txtModel.Text;
    vehicle.Year = int.Parse(txtYear.Text);
    vehicle.Category = cbxCategories.Text;
    vehicle.HasCDPlayer = chkCDPlayer.Checked;
    vehicle.HasDVDPlayer = chkDVDPlayer.Checked;
    vehicle.IsAvailable = chkAvailable.Checked;

    // Call the Add method of our collection class to add the car
    listOfCars.Add(txtTagNumber.Text, vehicle);

    // Save the list
    stmCars = new FileStream(strFilename,
                             FileMode.Create,
                             FileAccess.Write,
                             FileShare.Write);

    try
    {
        bfmCars.Serialize(stmCars, listOfCars);

        if (lblPictureName.Text.Length != 0)
        {
            FileInfo flePicture = new FileInfo(lblPictureName.Text);
            flePicture.CopyTo(@"\\EXPRESSION\Bethesda Car Rental\" +
                              txtTagNumber.Text +
                              flePicture.Extension);
        }

        txtTagNumber.Text = "";
        txtMake.Text = "";
        txtModel.Text = "";
        txtYear.Text = "";
        cbxCategories.Text = "Economy";
        chkCDPlayer.Checked = false;
        chkDVDPlayer.Checked = false;
        chkAvailable.Checked = false;
        lblPictureName.Text = ".";
        pbxCar.Image = null;
    }
    finally
    {
        stmCars.Close();
    }
}

Display the Central form

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

private void btnCars_Click(object sender, EventArgs e)
{
    CarEditor dlgCars = new CarEditor();
    dlgCars.ShowDialog();
}

To save the project, on the Standard toolbar, click the Save All button