Creating a Client Server Application III

Practical Learning: Creating Cars

1. To add a new class to the project, in the Class View, right-click BethedaCarRental1 -> Add -> Class...
2. Set the Class Name to Car and click Add
3. 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;
           }
       }
   }

4. To add a new form to the application, in the Solution Explorer, right-click BethesdaCarRental1 -> Add -> Windows Forms
5. Set the Name to CarEditor and click Add
6. 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 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

7. 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);
               }
           }
       }
   }

8. Return to the Car Editor form
9. Double-click an unoccupied area of the form
10. 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>();
    }

11. Return to the Car Editor form
12. 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();
        }
    }

13. Display the Central form
14. 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();
    }

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