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Example Application:
Georgetown Dry Cleaner
 

Georgetown Dry Cleaner

Introduction

This is a sample application that demonstrates how to create a file-based database.

This application is a dry cleaning business. To start, a customer would bring clothes to the store. The clerk registers the customer's information (name and phone number) and the clothes he or she brought. Other pieces of information are entered such as the date and the time the clothes were brought. To motivate customers, this store cleans the clothes the same day if the customer brings them before 9AM.

To make it a little complete, this application includes the ability to print.

Windows Controls:

Practical Learning: Creating the Application
  1. Start Microsoft Visual C#
  2. Create a Windows Application named GeorgetownDryCleaner1
  3. In the Solution Explorer, right-click Form1.cs and click Rename
  4. Type Central.cs and press Enter
  5. From the Menus & Toolbars section of the Toolbox, click MenuStrip and click the form
  6. While the menu strip is still selected, in the Properties window, click (Name) and type mnuMain
  7. Under the Properties window, click Insert Standard Items
  8. On the form, click Help and press Delete
  9. Click Tools and press Delete
  10. Click Edit and press Delete
  11. Click File, click Save As and press Delete
  12. Using the Properties window, change the names of the menu items as follows:
     
    Text New Name
    &File mnuFile
    &New mnuFileNew
    &Open mnuFileOpen
    &Save mnuFileSave
    &Print mnuFilePrint
    Print Pre&view mnuFilePrintPreview
  13. Design the form as follows:
     
    Georgetown Dry Cleaner
     
    Control Name Text Additional Properties
    GroupBox GroupBox   Order Identification  
    Label Label   &Receipt #:  
    TextBox TextBox txtReceiptNumber 1000 TextAlign: Right
    Label Label   Customer Name:  
    TextBox TextBox txtCustomerName    
    Label Label   Customer Phone:  
    TextBox TextBox txtCustomerPhone    
    Label Label   Date Left:  
    DateTimePicker DateTimePicker dtpDateLeft    
    Label Label   Time Left:  
    DateTimePicker Date Time Picker dtpTimeLeft   Format: Time
    Label Label   Date Expected:  
    DateTimePicker DateTimePicker dtpDateExpected    
    Label Label   Time Expected:  
    DateTimePicker DateTimePicker dtpTimeExpected   Format: Time
    Label Label   Order &Status:  
    ComboBox ComboBox cbxOrderStatus    
    Label Label   D&ate Picked Up:  
    DateTimePicker DateTimePicker dtpDatePickedUp    
    Label Label   Time Pic&kep Up:  
    DateTimePicker DateTimePicker dtpTimePickedUp    
    GroupBox GroupBox   Order Processing  
    Label Label   Item Type  
    Label Label   Unit Price  
    Label Label   Qty  
    Label Label   Sub Total  
    Label Label   Shirts  
    TextBox TextBox txtShirtsUnitPrice 1.25 TextAlign: Right
    TextBox TextBox txtShirtsQuantity 0 TextAlign: Right
    TextBox TextBox txtShirtsSubTotal 0.00 TextAlign: Right
    Label Label   Pants  
    TextBox TextBox txtPantsUnitPrice 1.95 TextAlign: Right
    TextBox TextBox txtPantsQuantity   TextAlign: Right
    TextBox TextBox txtPantsSubTotal 0.00 TextAlign: Right
    ComboBox ComboBox cbxItem1 None Items:
    None
    Women Suit
    Dress
    Regular Skirt
    Skirt With Hook
    Men's Suit 2Pc
    Men's Suit 3Pc
    Sweaters
    Silk Shirt
    Tie
    Coat
    Jacket
    Swede
    TextBox TextBox txtItem1UnitPrice 0.00 TextAlign: Right
    TextBox TextBox txtItem1Quantity 0 TextAlign: Right
    TextBox TextBox txtItem1SubTotal 0.00 TextAlign: Right
    ComboBox ComboBox cbxItem2 None Items:
    None
    Women Suit
    Dress
    Regular Skirt
    Skirt With Hook
    Men's Suit 2Pc
    Men's Suit 3Pc
    Sweaters
    Silk Shirt
    Tie
    Coat
    Jacket
    Swede
    TextBox TextBox txtItem2UnitPrice 0.00 TextAlign: Right
    TextBox TextBox txtItem2Quantity 0 TextAlign: Right
    TextBox TextBox txtItem2SubTotal 0.00 TextAlign: Right
    ComboBox ComboBox cbxItem3 None Items:
    None
    Women Suit
    Dress
    Regular Skirt
    Skirt With Hook
    Men's Suit 2Pc
    Men's Suit 3Pc
    Sweaters
    Silk Shirt
    Tie
    Coat
    Jacket
    Swede
    TextBox TextBox txtItem3UnitPrice 0.00 TextAlign: Right
    TextBox TextBox txtItem3Quantity 0 TextAlign: Right
    TextBox TextBox txtItem3SubTotal 0.00 TextAlign: Right
    ComboBox ComboBox cbxItem4 None Items:
    None
    Women Suit
    Dress
    Regular Skirt
    Skirt With Hook
    Men's Suit 2Pc
    Men's Suit 3Pc
    Sweaters
    Silk Shirt
    Tie
    Coat
    Jacket
    Swede
    TextBox TextBox txtItem4UnitPrice 0.00 TextAlign: Right
    TextBox TextBox txtItem4Quantity 0 TextAlign: Right
    TextBox TextBox txtItem4SubTotal 0.00 TextAlign: Right
    GroupBox GroupBox   Order Summary  
    Label Label   Cleaning Total:  
    TextBox TextBox txtCleaningTotal 0.00 TextAlign: Right
    Label Label   Tax Rate:  
    TextBox TextBox txtTaxRate 7.75 TextAlign: Right
    Label Label   %  
    Label Label   Tax Amount:  
    TextBox TextBox txtTaxAmount 0.00 TextAlign: Right
    Label Label   Net Total:  
    TextBox TextBox txtNetPrice 0.00 TextAlign: Right
  14. Double-click the Time Left control and implement its ValueChanged event as follows:
      
    private void dtpTimeLeft_ValueChanged(object sender, EventArgs e)
{
    var dateLeft = this.dtpDateLeft.Value;
    var timeLeft = this.dtpTimeLeft.Value;
    var time9AM = new DateTime(timeLeft.Year, timeLeft.Month,
                                    timeLeft.Day, 9, 0, 0);

    // If the customer leaves clothes before 9AM...
    if (timeLeft <= time9AM)
    {
        // ... then they should be ready the same day after 5PM
        this.dtpDateExpected.Value = dateLeft;
        this.dtpTimeExpected.Value = new DateTime(dateLeft.Year,
                                                  dateLeft.Month,
						  dateLeft.Day, 17, 0, 0);
    }
    else
    {
        // If the clothes were left after 9AM,
        // then they will be available the following business morning at 8AM
        // If the following day is Sunday,
        // then they will be ready the following Monday
        if (dateLeft.DayOfWeek == DayOfWeek.Saturday)
        {
            dtpDateExpected.Value = dateLeft.AddDays(2.00D);
            dtpTimeExpected.Value = new DateTime(dateLeft.Year,
                                                 dateLeft.Month,
						 dateLeft.Day + 2, 8, 0, 0);
        }
        else
        {
            dtpDateExpected.Value = new DateTime(dateLeft.Year,
                                                 dateLeft.Month,
						 dateLeft.Day + 1);
            dtpTimeExpected.Value = new DateTime(dateLeft.Year,
                                                 dateLeft.Month,
						 dateLeft.Day + 1, 8, 0, 0);
        }
    }
}
  15. Return to the form
  16. On the main menu of the form, click File and double-click New
  17. Implement the 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;

namespace GeorgetownDryCleaner1
{
    public partial class Central : Form
    {
        int iFilename;
        bool IsNewCleaningOrder;
        string Filename;

        public Central()
        {
            InitializeComponent();
        }

        private void dtpTimeLeft_ValueChanged(object sender, EventArgs e)
        {
            . . . No Change
        }

        private void mnuFileNew_Click(object sender, EventArgs e)
        {
            // We will store our files in the following folder
            var strDirectory = @"C:\Georgetown Dry Cleaner\Receipts";
            
            var dirInfo = Directory.CreateDirectory(strDirectory);

            // Get the list of files, if any, from our directory
            var fleList = dirInfo.GetFiles();

            // If there is no file in the directory,
            // then we will use 1000 as the first file name
            if (fleList.Length == 0)
            {
                iFilename = 1000;
            }
            else // If there was at least one file in the directory
            {
                // Get a reference to the last file
                FileInfo fleLast = fleList[fleList.Length - 1];
                // Get the name of the last file without its extension
                string fwe = 
		    Path.GetFileNameWithoutExtension(fleLast.FullName);
                // Increment the name of the file by 1
                try
                {
                    iFilename = int.Parse(fwe) + 1;
                }
                catch (FormatException)
                {
                }
            }

            // Update our global name of the file
            Filename = strDirectory + "\\" + iFilename.ToString() + ".gcs";
            txtReceiptNumber.Text = iFilename.ToString();

            txtCustomerName.Text = "";
            txtCustomerPhone.Text = "";
            dtpDateLeft.Value = DateTime.Today;
            dtpTimeLeft.Value = DateTime.Today;
            dtpDateExpected.Value = DateTime.Today;
            dtpTimeExpected.Value = DateTime.Today;

            cbxStatus.Text = "Not Yet Ready";
            dtpDatePickedUp.Value = DateTime.Today;
            dtpTimePickedUp.Value = DateTime.Today;

            txtUnitPriceShirts.Text = "1.25";
            txtQuantityShirts.Text = "0";
            txtSubTotalShirts.Text = "0.00";
            txtUnitPricePants.Text = "1.95";
            txtQuantityPants.Text = "0";
            txtSubTotalPants.Text = "0.00";
            cbxItem1.Text = "None";
            txtUnitPriceItem1.Text = "0.00";
            txtQuantityItem1.Text = "0";
            txtSubTotalItem1.Text = "0.00";
            cbxItem2.Text = "None";
            txtUnitPriceItem2.Text = "0.00";
            txtQuantityItem2.Text = "0";
            txtSubTotalItem2.Text = "0.00";
            cbxItem3.Text = "None";
            txtUnitPriceItem3.Text = "0.00";
            txtQuantityItem3.Text = "0";
            txtSubTotalItem3.Text = "0.00";
            cbxItem4.Text = "None";
            txtUnitPriceItem4.Text = "0.00";
            txtQuantityItem4.Text = "0";
            txtSubTotalItem4.Text = "0.00";

            txtCleaningTotal.Text = "0.00";
            txtTaxRate.Text = "7.75";
            txtTaxAmount.Text = "0.00";
            txtCleaningTotal.Text = "0.00";

            txtCustomerName.Focus();
        }
    }
}
  18. Return to the form
  19. Click the unit price text box that corresponds to the shirts
  20. In the Properties window, click the Events button and double-click Leave
  21. Implement the event as follows:
      
    internal void SaveCleaningOrder()
{
    // We will store our files in the following folder    
    string strDirectory = @"C:\Georgetown Dry Cleaner\Receipts";
    DirectoryInfo dirInfo = Directory.CreateDirectory(strDirectory);

    // Get the list of files, if any, from our directory
    FileInfo[] fleList = dirInfo.GetFiles();

    // If this is a new cleaning order,
    // get ready to create a name for the file
    if (IsNewCleaningOrder == true)
    {
        // If there is no file in the directory,
        // then we will use 1000 as the first file name
        if (fleList.Length == 0)
        {
            iFilename = 1000;
        }
        else // If there was at least one file in the directory
        {
            // Get a reference to the last file
            FileInfo fleLast = fleList[fleList.Length - 1];
            // Get the name of the last file without its extension
            string fwe = Path.GetFileNameWithoutExtension(fleLast.FullName);
            // Increment the name of the file by 1
            iFilename = int.Parse(fwe) + 1;
        }

        // Update our global name of the file
        Filename = strDirectory + "\\" + iFilename.ToString() + ".gcs";
        txtReceiptNumber.Text = iFilename.ToString();

        IsNewCleaningOrder = false;
    } // If a cleaning order was already opened, we will simply update it
    else
        Filename = @"C:\Georgetown Dry Cleaner\Receipts\" +
				 txtReceiptNumber.Text + ".gcs";

    StreamWriter stmGCS = new StreamWriter(Filename);

    try
    {
        stmGCS.WriteLine(txtCustomerName.Text);
        stmGCS.WriteLine(txtCustomerPhone.Text);
        stmGCS.WriteLine(dtpDateLeft.Value.ToString("D"));
        stmGCS.WriteLine(dtpTimeLeft.Value.ToString("t"));
        stmGCS.WriteLine(dtpDateExpected.Value.ToString("D"));
        stmGCS.WriteLine(dtpTimeExpected.Value.ToString("t"));

        stmGCS.WriteLine(cbxStatus.Text);
        stmGCS.WriteLine(dtpDatePickedUp.Value.ToString("D"));
        stmGCS.WriteLine(dtpTimePickedUp.Value.ToString("t"));

        stmGCS.WriteLine(txtUnitPriceShirts.Text);
        stmGCS.WriteLine(txtQuantityShirts.Text);
        stmGCS.WriteLine(txtSubTotalShirts.Text);
        stmGCS.WriteLine(txtUnitPricePants.Text);
        stmGCS.WriteLine(txtQuantityPants.Text);
        stmGCS.WriteLine(txtSubTotalPants.Text);

        stmGCS.WriteLine(cbxItem1.Text);
        stmGCS.WriteLine(txtUnitPriceItem1.Text);
        stmGCS.WriteLine(txtQuantityItem1.Text);
        stmGCS.WriteLine(txtSubTotalItem1.Text);

        stmGCS.WriteLine(cbxItem2.Text);
        stmGCS.WriteLine(txtUnitPriceItem2.Text);
        stmGCS.WriteLine(txtQuantityItem2.Text);
        stmGCS.WriteLine(txtSubTotalItem2.Text);

        stmGCS.WriteLine(cbxItem3.Text);
        stmGCS.WriteLine(txtUnitPriceItem3.Text);
        stmGCS.WriteLine(txtQuantityItem3.Text);
        stmGCS.WriteLine(txtSubTotalItem3.Text);

        stmGCS.WriteLine(cbxItem4.Text);
        stmGCS.WriteLine(txtUnitPriceItem4.Text);
        stmGCS.WriteLine(txtQuantityItem4.Text);
        stmGCS.WriteLine(txtSubTotalItem4.Text);

        stmGCS.WriteLine(txtCleaningTotal.Text);
        stmGCS.WriteLine(txtTaxRate.Text);
        stmGCS.WriteLine(txtTaxAmount.Text);
        stmGCS.WriteLine(txtNetPrice.Text);
    }
    finally
    {
        stmGCS.Close();
    }
}

private void txtUnitPriceShirts_Leave(object sender, EventArgs e)
{
    decimal unitPriceShirts = 0.00M, unitPricePants = 0.00M,
            unitPriceItem1 = 0.00M, unitPriceItem2 = 0.00M,
            unitPriceItem3 = 0.00M, unitPriceItem4 = 0.00M;
    decimal subTotalShirts = 0.00M, subTotalPants = 0.00M,
            subTotalItem1 = 0.00M, subTotalItem2 = 0.00M,
            subTotalItem3 = 0.00M, subTotalItem4 = 0.00M;
    int qtyShirts = 1, qtyPants = 1, qtyItem1 = 1,
        qtyItem2 = 1, qtyItem3 = 1, qtyItem4 = 4;
    decimal cleaningTotal = 0.00M, taxRate = 0.00M,
            taxAmount = 0.00M, netPrice = 0.00M;

    // Retrieve the unit price of this item
    // Just in case the user types an invalid value,
    // we are using a try...catch
    try
    {
        unitPriceShirts = decimal.Parse(this.txtUnitPriceShirts.Text);
    }
    catch (FormatException)
    {
        MessageBox.Show("The value you entered for the price of " +
                        "shirts is not valid" +
                        "\nPlease try again");
        return;
    }

    // Retrieve the number of this item
    // Just in case the user types an invalid value,
    // we are using a try...catch
    try
    {
        qtyShirts = int.Parse(this.txtQuantityShirts.Text);
    }
    catch (FormatException)
    {
        MessageBox.Show("The value you entered for the number of " +
                        "shirts is not valid" +
                        "\nPlease try again");
        return;
    }

    try
    {
        unitPricePants = decimal.Parse(this.txtUnitPricePants.Text);
    }
    catch (FormatException)
    {
        MessageBox.Show("The value you entered for the price of " +
                        "pants is not valid" +
                        "\nPlease try again");
        return;
    }

    try
    {
        qtyPants = int.Parse(this.txtQuantityPants.Text);
    }
    catch (FormatException)
    {
        MessageBox.Show("The value you entered for the number of " +
                        "pants is not valid" +
                        "\nPlease try again");
        return;
    }

    if( (cbxItem1.Text == "None") ||
	(cbxItem1.Text == "") )
    {
        qtyItem1 = 0;
        unitPriceItem1 = 0.00M;
    }
    else
    {
        try
        {
            unitPriceItem1 = decimal.Parse(this.txtUnitPriceItem1.Text);
        }
        catch (FormatException)
        {
          MessageBox.Show("The value you entered for the price is not valid" +
                            "\nPlease try again");
            return;
        }

        try
        {
            qtyItem1 = int.Parse(this.txtQuantityItem1.Text);
        }
        catch (FormatException)
        {
            MessageBox.Show("The value you entered is not valid" +
                            "\nPlease try again");
            return;
        }
    }

    if( (cbxItem2.Text == "None") ||
	(cbxItem2.Text == "") )
    {
        qtyItem2 = 0;
        unitPriceItem2 = 0.00M;
    }
    else
    {
        try
        {
            unitPriceItem2 = decimal.Parse(this.txtUnitPriceItem2.Text);
        }
        catch (FormatException)
        {
            MessageBox.Show("The value you entered for " +
			    "the price is not valid" +
                            "\nPlease try again");
            return;
        }

        try
        {
            qtyItem2 = int.Parse(this.txtQuantityItem2.Text);
        }
        catch (FormatException)
        {
            MessageBox.Show("The value you entered is not valid" +
                            "\nPlease try again");
            return;
        }
    }

    if( (cbxItem3.Text == "None") ||
	(cbxItem3.Text == "") )
    {
        qtyItem3 = 0;
        unitPriceItem3 = 0.00M;
    }
    else
    {
        try
        {
            unitPriceItem3 = decimal.Parse(this.txtUnitPriceItem3.Text);
        }
        catch (FormatException)
        {
            MessageBox.Show("The value you entered for the " +
			    "price is not valid" +
                            "\nPlease try again");
            return;
        }

        try
        {
            qtyItem3 = int.Parse(this.txtQuantityItem3.Text);
        }
        catch (FormatException)
        {
            MessageBox.Show("The value you entered is not valid" +
                            "\nPlease try again");
            return;
        }
    }

    if ((cbxItem4.Text == "None") || (cbxItem4.Text == ""))
    {
        qtyItem4 = 0;
        unitPriceItem4 = 0.00M;
    }
    else
    {
        try
        {
            unitPriceItem4 = decimal.Parse(this.txtUnitPriceItem4.Text);
        }
        catch (FormatException)
        {
          MessageBox.Show("The value you entered for the price is not valid" +
                            "\nPlease try again");
            return;
        }
        try
        {
            qtyItem4 = int.Parse(this.txtQuantityItem4.Text);
        }
        catch (FormatException)
        {
            MessageBox.Show("The value you entered is not valid" +
                            "\nPlease try again");
            return;
        }
    }

            // Calculate the sub-total for this item
            subTotalShirts = qtyShirts * unitPriceShirts;
            subTotalPants = qtyPants * unitPricePants;
            subTotalItem1 = qtyItem1 * unitPriceItem1;
            subTotalItem2 = qtyItem2 * unitPriceItem2;
            subTotalItem3 = qtyItem3 * unitPriceItem3;
            subTotalItem4 = qtyItem4 * unitPriceItem4;

            // Calculate the total based on sub-totals
            cleaningTotal = subTotalShirts + subTotalPants + subTotalItem1 +
                    subTotalItem2 + subTotalItem3 + subTotalItem4;

            taxRate = decimal.Parse(this.txtTaxRate.Text);
            // Calculate the amount owed for the taxes
            taxAmount = cleaningTotal * taxRate / 100;
            // Add the tax amount to the total order
            netPrice = cleaningTotal + taxAmount;

            // Display the sub-total in the corresponding text box
            txtSubTotalShirts.Text = subTotalShirts.ToString("F");
            txtSubTotalPants.Text = subTotalPants.ToString("F");
            txtSubTotalItem1.Text = subTotalItem1.ToString("F");
            txtSubTotalItem2.Text = subTotalItem2.ToString("F");
            txtSubTotalItem3.Text = subTotalItem3.ToString("F");
            txtSubTotalItem4.Text = subTotalItem4.ToString("F");

            txtCleaningTotal.Text = cleaningTotal.ToString("F");
            txtTaxAmount.Text = taxAmount.ToString("F");
            txtNetPrice.Text = netPrice.ToString("F");

            SaveCleaningOrder();
}
  22. Return to the form, click File and double-click Save
  23. Implement the event as follows:
      
    private void mnuFileSave_Click(object sender, EventArgs e)
{
    SaveCleaningOrder();
}
  24. Return to the form
  25. Click the unit price text box that corresponds to the pants
  26. Press and hold Shift
  27. Click the unit price text boxes for item 1, item 2, item 3, and item 4
  28. Click each text box under the Qty label
  29. Click the Tax Rate text box
  30. Release Shift
  31. In the Events section of the Properties window, click Leave, click the arrow of its combo box and select txtUnitPriceShirts_Leave
  32. Execute the application
  33. Create a cleaning order
     
    Georgetown Dry Cleaner
  34. Click New and create a few more cleaning orders
     
    Georgetown Dry Cleaner
  35. Close the form and return to your programming environment
  36. On the form, click File and double-click Open
  37. Implement the event as follows:
      
    private void mnuFileOpen_Click(object sender, EventArgs e)
{
    if (txtReceiptNumber.Text == "")
        return;
    else
    {
        try
        {
            IsNewCleaningOrder = false;
            Filename =
		@"C:\Georgetown Dry Cleaner\Receipts\" +
                txtReceiptNumber.Text + ".gcs";

            StreamReader rdrGCS = new StreamReader(Filename);

            try
            {
                txtCustomerName.Text = rdrGCS.ReadLine();
                txtCustomerPhone.Text = rdrGCS.ReadLine();
                dtpDateLeft.Value =
			DateTime.Parse(rdrGCS.ReadLine());
                dtpTimeLeft.Value =
			DateTime.Parse(rdrGCS.ReadLine());
                dtpDateExpected.Value =
			DateTime.Parse(rdrGCS.ReadLine());
                dtpTimeExpected.Value =
			DateTime.Parse(rdrGCS.ReadLine());

                cbxStatus.Text = rdrGCS.ReadLine();
                dtpDatePickedUp.Value =
			DateTime.Parse(rdrGCS.ReadLine());
                dtpTimePickedUp.Value =
			DateTime.Parse(rdrGCS.ReadLine());

                txtUnitPriceShirts.Text = rdrGCS.ReadLine();
                txtQuantityShirts.Text = rdrGCS.ReadLine();
                txtSubTotalShirts.Text = rdrGCS.ReadLine();
                txtUnitPricePants.Text = rdrGCS.ReadLine();
                txtQuantityPants.Text = rdrGCS.ReadLine();
                txtSubTotalPants.Text = rdrGCS.ReadLine();

                cbxItem1.Text = rdrGCS.ReadLine();
                txtUnitPriceItem1.Text = rdrGCS.ReadLine();
                txtQuantityItem1.Text = rdrGCS.ReadLine();
                txtSubTotalItem1.Text = rdrGCS.ReadLine();

                cbxItem2.Text = rdrGCS.ReadLine();
                txtUnitPriceItem2.Text = rdrGCS.ReadLine();
                txtQuantityItem2.Text = rdrGCS.ReadLine();
                txtSubTotalItem2.Text = rdrGCS.ReadLine();

                cbxItem3.Text = rdrGCS.ReadLine();
                txtUnitPriceItem3.Text = rdrGCS.ReadLine();
                txtQuantityItem3.Text = rdrGCS.ReadLine();
                txtSubTotalItem3.Text = rdrGCS.ReadLine();

                cbxItem4.Text = rdrGCS.ReadLine();
                txtUnitPriceItem4.Text = rdrGCS.ReadLine();
                txtQuantityItem4.Text = rdrGCS.ReadLine();
                txtSubTotalItem4.Text = rdrGCS.ReadLine();

                txtCleaningTotal.Text = rdrGCS.ReadLine();
                txtTaxRate.Text = rdrGCS.ReadLine();
                txtTaxAmount.Text = rdrGCS.ReadLine();
                txtNetPrice.Text = rdrGCS.ReadLine();
            }
            finally
            {
                rdrGCS.Close();
            }
        }
        catch (FileNotFoundException)
        {
            MessageBox.Show("There is no cleaning order " +
			    "with that receipt number");
        }
    }
}
  38. Execute the application
  39. Type 1001 for the receipt number and, on the main menu of the form, click File -> Open
  40. Close the form and return to your programming environment
  41. Display the form
  42. In the combo box on top of the form, select Central and click the Events button
  43. Double-click and implement the event as follows:
      
    private void Central_Load(object sender, EventArgs e)
{
    mnuFileNew_Click(sender, e);
}
  44. Return to the form
  45. On the form, click the Customer Name text box
  46. In the Events section of the Properties window, double-click Leave and implement its event as follows:
      
    private void txtCustomerName_Leave(object sender, EventArgs e)
{
    if (txtCustomerName.Modified == true)
        SaveCleaningOrder();
}
  47. Return to the form
  48. On the form, click the Customer Phone text box
  49. In the Events section of the Properties window, double-click Leave and implement its event as follows:
      
    private void txtCustomerPhone_Leave(object sender, EventArgs e)
{
    if (txtCustomerPhone.Modified == true)
        SaveCleaningOrder();
}
  50. Execute the application and create a few cleaning orders
  51. Close the form and return to your programming environment
  52. From the Printing section of the Toolbox, click PrintDocument and click the form
  53. While the new control is still selected, in the Properties window, click the Properties button, click (Name), type docPrint and press Enter
  54. Under the form, double-click docPrint and implement its event as follows:
      
    private void docPrint_PrintPage(object sender, 
	System.Drawing.Printing.PrintPageEventArgs e)
{
    e.Graphics.DrawLine(new Pen(Color.Black, 2), 60, 90, 720, 90);
    e.Graphics.DrawLine(new Pen(Color.Black, 1), 60, 93, 720, 93);

    string strDisplay = "Georgetown Dry Cleaning Services";
    System.Drawing.Font fntString = new Font("Times New Roman", 28,
                FontStyle.Bold);
    e.Graphics.DrawString(strDisplay, fntString,
                Brushes.Black, 80, 100);

    strDisplay = "Customer Cleaning Order";
    fntString = new System.Drawing.Font("Times New Roman", 18,
                FontStyle.Bold);
    e.Graphics.DrawString(strDisplay, fntString,
                Brushes.Black, 220, 150);

    e.Graphics.DrawLine(new Pen(Color.Black, 1), 60, 184, 720, 184);
    e.Graphics.DrawLine(new Pen(Color.Black, 2), 60, 188, 720, 188);

    fntString = new System.Drawing.Font("Times New Roman", 12,
                FontStyle.Bold);
    e.Graphics.DrawString("", fntString,
                Brushes.Black, 80, 200);

    fntString = new System.Drawing.Font("Times New Roman", 12,
                FontStyle.Bold);
    e.Graphics.DrawString("Customer Identification:  ", fntString,
                Brushes.Black, 100, 220);
    fntString = new System.Drawing.Font("Times New Roman", 12,
                FontStyle.Regular);
    e.Graphics.DrawString(txtCustomerName.Text + "  -  " +
                                  txtCustomerPhone.Text, fntString,
                                  Brushes.Black, 300, 220); ;

    e.Graphics.DrawLine(new Pen(Color.Black, 1), 100, 240, 700, 240);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString("Date Left:        ", fntString,
                                  Brushes.Black, 100, 260);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);

    e.Graphics.DrawString(dtpDateLeft.Value.ToString("D"), fntString,
                                  Brushes.Black, 300, 260);
    e.Graphics.DrawLine(new Pen(Color.Black, 1), 100, 280, 700, 280);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString("Time Left: ", fntString,
                                  Brushes.Black, 500, 260);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(dtpTimeLeft.Value.ToString("t"), fntString,
                                  Brushes.Black, 620, 260);

    fntString = new System.Drawing.Font("Times New Roman",
					12, FontStyle.Bold);
    e.Graphics.DrawString("Date Expected:    ", fntString,
                Brushes.Black, 100, 300);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(dtpDateExpected.Value.ToString("D"),
			  fntString, Brushes.Black, 300, 300);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString("Time Expected: ", fntString,
                                  Brushes.Black, 500, 300);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(dtpTimeExpected.Value.ToString("t"),
			  fntString, Brushes.Black, 620, 300);

    e.Graphics.DrawLine(new Pen(Color.Black, 2), 100, 320, 700, 320);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString("Item Type",
                                  fntString, Brushes.Black, 140, 350);
    e.Graphics.DrawString("Unit Price",
                                  fntString, Brushes.Black, 300, 350);
    e.Graphics.DrawString("Quantity",
                                  fntString, Brushes.Black, 405, 350);
    e.Graphics.DrawString("Sub-Total",
                                  fntString, Brushes.Black, 500, 350);

    e.Graphics.DrawLine(new Pen(Color.Black, 2), 140, 370, 640, 370);

    StringFormat fmtString = new StringFormat();
    fmtString.Alignment = StringAlignment.Far;

    e.Graphics.DrawString("Shirts",
                                  fntString, Brushes.Black, 150, 380);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(txtUnitPriceShirts.Text, fntString,
                Brushes.Black, 350, 380, fmtString);
    e.Graphics.DrawString(txtQuantityShirts.Text, fntString,
                Brushes.Black, 440, 380, fmtString);
    e.Graphics.DrawString(txtSubTotalShirts.Text, fntString,
                Brushes.Black, 550, 380, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 1), 140, 400, 640, 400);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString("Pants",
                                  fntString, Brushes.Black, 150, 410);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(txtUnitPricePants.Text, fntString,
                Brushes.Black, 350, 410, fmtString);
    e.Graphics.DrawString(txtQuantityPants.Text, fntString,
                Brushes.Black, 440, 410, fmtString);
    e.Graphics.DrawString(txtSubTotalPants.Text, fntString,
                Brushes.Black, 550, 410, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 1), 140, 430, 640, 430);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString(cbxItem1.Text,
                                  fntString, Brushes.Black, 150, 440);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(txtUnitPriceItem1.Text, fntString,
                Brushes.Black, 350, 440, fmtString);
    e.Graphics.DrawString(txtQuantityItem1.Text, fntString,
                Brushes.Black, 440, 440, fmtString);
    e.Graphics.DrawString(txtSubTotalItem1.Text, fntString,
                Brushes.Black, 550, 440, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 1), 140, 460, 640, 460);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString(cbxItem2.Text,
                                  fntString, Brushes.Black, 150, 470);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(txtUnitPriceItem2.Text, fntString,
                Brushes.Black, 350, 470, fmtString);
    e.Graphics.DrawString(txtQuantityItem2.Text, fntString,
                Brushes.Black, 440, 470, fmtString);
    e.Graphics.DrawString(txtSubTotalItem2.Text, fntString,
                Brushes.Black, 550, 470, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 1), 140, 490, 640, 490);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString(cbxItem3.Text,
                                  fntString, Brushes.Black, 150, 500);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(txtUnitPriceItem3.Text, fntString,
                Brushes.Black, 350, 500, fmtString);
    e.Graphics.DrawString(txtQuantityItem3.Text, fntString,
                Brushes.Black, 440, 500, fmtString);
    e.Graphics.DrawString(txtSubTotalItem3.Text, fntString,
                Brushes.Black, 550, 500, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 1), 140, 520, 640, 520);

    fntString = new Font("Times New Roman", 12, FontStyle.Bold);
    e.Graphics.DrawString(cbxItem4.Text,
                fntString, Brushes.Black, 150, 530);
    fntString = new Font("Times New Roman", 12, FontStyle.Regular);
    e.Graphics.DrawString(txtUnitPriceItem4.Text, fntString,
                Brushes.Black, 350, 530, fmtString);
    e.Graphics.DrawString(txtQuantityItem4.Text, fntString,
                Brushes.Black, 440, 530, fmtString);
    e.Graphics.DrawString(txtSubTotalItem4.Text, fntString,
                Brushes.Black, 550, 530, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 2), 140, 550, 640, 550);

    fntString = new System.Drawing.Font("Times New Roman", 12,
					FontStyle.Bold);
    e.Graphics.DrawString("Order Summary", fntString,
                          Brushes.Black, 260, 600);
    e.Graphics.DrawLine(new Pen(Color.Black, 2), 220, 620, 560, 620);

    fntString = new System.Drawing.Font("Times New Roman",
					10, FontStyle.Bold);
    e.Graphics.DrawString("Cleaning Total:", fntString,
                          Brushes.Black, 260, 630);
    fntString = new System.Drawing.Font("Times New Roman",
					10, FontStyle.Regular);
    e.Graphics.DrawString(txtCleaningTotal.Text, fntString,
                          Brushes.Black, 440, 630, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 1),
			220, 650, 520, 650);

    fntString = new System.Drawing.Font("Times New Roman",
					10, FontStyle.Bold);
    e.Graphics.DrawString("Tax Rate:", fntString,
                          Brushes.Black, 260, 660);
    fntString = new System.Drawing.Font("Times New Roman",
					10, FontStyle.Regular);
    e.Graphics.DrawString(txtTaxRate.Text, fntString,
                          Brushes.Black, 440, 660, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 1),
			220, 680, 520, 680);

    fntString = new System.Drawing.Font("Times New Roman",
					10, FontStyle.Bold);
    e.Graphics.DrawString("Tax Amount:", fntString,
                          Brushes.Black, 260, 690);
    fntString = new System.Drawing.Font("Times New Roman",
					10, FontStyle.Regular);
    e.Graphics.DrawString(txtTaxAmount.Text, fntString,
                	  Brushes.Black, 440, 690, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 1),
			220, 710, 520, 710);

    fntString = new System.Drawing.Font("Times New Roman",
					10, FontStyle.Bold);
    e.Graphics.DrawString("Net Price:", fntString,
                Brushes.Black, 260, 720);
    fntString = new System.Drawing.Font("Times New Roman",
					10, FontStyle.Regular);
    e.Graphics.DrawString(txtNetPrice.Text, fntString,
                Brushes.Black, 440, 720, fmtString);
    e.Graphics.DrawLine(new Pen(Color.Black, 2),
			200, 740, 560, 740);
}
  55. Return to the form
  56. From the Printing section of the Toolbox, click PrintDialog and click the form
  57. In the Properties window, change its Name to dlgPrint
  58. Still in the Properties windows, set its Document property to docPrint
  59. On the main menu of the form, click File and double-click Print
  60. Implement the event as follows:
      
    private void mnuFilePrint_Click(object sender, EventArgs e)
{
    if (dlgPrint.ShowDialog() == DialogResult.OK)
        docPrint.Print();
}
  61. Return to the form
  62. From the Printing section of the Toolbox, click PrintPreviewDialog and click the form
  63. In the Properties window, change its Name to dlgPrintPreview
  64. Still in the Properties windows, set its Document property to docPrint
  65. On the main menu of the form, click File and double-click Print Preview
  66. Implement the event as follows:
      
    private void mnuFilePrintPreview_Click(object sender, EventArgs e)
{
    dlgPrintPreview.ShowDialog();
}
  67. Return to the form
  68. On the main menu of the form, click File and double-click Exit
  69. Implement the event as follows:
      
    private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
    Close();
}
  70. Execute the application
  71. Open an existing cleaning order and print preview it
     
    Georgetown Dry Cleaner
  72. Close the form and return to your programming environment
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