In the Events Section of the Properties Window, Double-click Double Click

8/9/2019 In the Events Section of the Properties Window, Double-click Double Click

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This application explores the built-in collection classes of the .NET Framework.

The application is used by a company that sells auto-parts. To start, the company mustcreate the items being sold in the store. Each car part is known for the make (or

manufacturer of the car), the model of the car, the category of the part (this makes it a

little easier to locate, categorize, or identify a part), the part name (a short description),and its unit price.

Once the parts have been created, when a customer comes to the store, a clerk can locatethe desires part in the database.

Practical Learning Practical Learning: Creating the Application

1. Start Microsoft Visual C# and create a new Windows Application namedCollegeParkAutoParts3

2. To create a dialog box, on the main menu, click Project -> Add Windows Form...3. Set the name to MakeEditor and click Add

4. Design the form as follows:

Make EditorControl Text Name Other Properties

Label &Make:TextBox txtMake Modifiers: Public

Button OK btnOK DialogResult: OKButton Cancel btnCancel DialogResult: Cancel

Form Property ValueFormBorderStyle FixedDialog

Text Make EditorStartPosition CenterScreen

AcceptButton btnOKCancelButton btnCancel

MaximizeBox False


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MinimizeBox False

ShowInTaskbar False

5. To create a dialog box, on the main menu, click Project -> Add Windows Form...6. Set the name to ModelEditor and click Add



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College Park Auto Parts: Model Editor

Control Text Name Other PropertiesLabel &Model:

TextBox txtModel Modifiers: Public

Button OK btnOK DialogResult: OKButton Cancel btnCancel DialogResult: CancelForm Property Value

FormBorderStyle FixedDialogText Model Editor

StartPosition CenterScreenAcceptButton btnOK

CancelButton btnCancelMaximizeBox False

MinimizeBox FalseShowInTaskbar False

8. To create a dialog box, in the Solution Explorer, right-click CollegeParkAutoParts2 -> Add -> Windows Form...

9. Set the name to CategoryEditor and click Add10. Design the form as follows:

College Park Auto Parts: Category Editor

Control Text Name Other PropertiesLabel &Category:

TextBox txtCategory Modifiers: PublicButton OK btnOK DialogResult: OK

Button Cancel btnCancel DialogResult: CancelForm Property Value

FormBorderStyle FixedDialogText Category Editor

StartPosition CenterScreenAcceptButton btnOK

CancelButton btnCancelMaximizeBox False

MinimizeBox FalseShowInTaskbar False

11. On the main menu, click Project -> Add Windows Form...12. Set the Name to PartEditor and click Add


College Park Auto-Part - Part Editor

Control Text Name Other PropertiesLabel &Year:

TextBox txtItemNumberLabel &Make:


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ComboBox cbxMakesButton New C&ategory... btnNewMake

Label M&odel:ComboBox cbxModels

Button New Mo &del... btnNewModel

Label &Category:ComboBox cbxCategoriesButton New Ca&tegory btnNewCategory

Label &Unit Price:TextBox 0.00 txtUnitPrice TextAlign: Right

Label Part #:TextBox txtPartNumber

Label &Part Name:TextBox txtPartName

Button Submit btnSubmitButton Close btnClose DialogResult: Cancel

Form Property ValueFormBorderStyle FixedDialog

Text College Park Auto -Parts: Part EditorStartPosition CenterScreen

MaximizeBox FalseMinimizeBox False

ShowInTaskbar False14. Double-click the New Make button and implement it as follows:

private void btnNewMake_Click(object sender, EventArgs e){

MakeEditor editor = new MakeEditor();

if (editor.ShowDialog() == DialogResult.OK){

if (editor.txtMake.Text.Length > 0){

string strMake = editor.txtMake.Text;

// Make sure the category is not yet in the listif (cbxMakes.Items.Contains(strMake))

MessageBox.Show(strMake + " is already in the list");else

{// Since this is a new category, add it to the combox box

cbxMakes.Items.Add(strMake);}

cbxMakes.Text = strMake;


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}}

}

15. Return to the Part Editor dialog box and double-click the New Model button

16. Implement the event as follows:

private void btnNewModel_Click(object sender, EventArgs e){

ModelEditor editor = new ModelEditor();


if (editor.txtModel.Text.Length > 0){

string strModel = editor.txtModel.Text;

// Make sure the category is not yet in the listif (cbxModels.Items.Contains(strModel))

MessageBox.Show(strModel + " is already in the list");else

{// Since this is a new category, add it to the combox box

cbxModels.Items.Add(strModel);}

cbxModels.Text = strModel;

}}

}

17. Return to the Part Editor dialog box and double-click the New Category button18. Implement the event as follows:

private void btnNewCategory_Click(object sender, EventArgs e){

CategoryEditor editor = new CategoryEditor();


if (editor.txtCategory.Text.Length > 0){

string strCategory = editor.txtCategory.Text;


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// Make sure the category is not yet in the listif (cbxCategories.Items.Contains(strCategory))

MessageBox.Show(strCategory + " is already in the list");else

{

// Since this is a new category, add it to the combox boxcbxCategories.Items.Add(strCategory);}

cbxCategories.Text = strCategory;

}}

}

19. Save the file and close the form20. To create an icon, on the main menu, click Project -> Add New Item...

21. In the Templates list, click Icon File22. Set the Name to cpap1 and click Add

23. Right-click the white area and click Delete Image Type24. Design the 16x16, 16 colors version of the icon as follows:

25. On the main menu, click File -> Save cpap1.ico As

26. Select the bin\Debug folder of the current folder and click Save27. On the main menu, click File -> Close

28. In the Solution Explorer, expand bin and expand Debug29. In the Solution Explorer, right-click the Debug folder -> Add -> New Item...

30. In the Templates list, make sure Icon File is selected.Set the Name to cpap2 and click Add


33. Save the file and close the icon window

34. In the Solution Explorer, right- click the Debug folder -> Add -> New Item...35. In the Templates list, make sure Icon File is selected.

Set the Name to year1 and click Add36. Right-click the white area and click Delete Image Type

37. Design the 16x16, 16 colors version of the icon as follows:

38. Save the file and close the icon window39. In the Solution Explorer, right- click the Debug folder -> Add -> New Item...

40. In the Templates list, make sure Icon File is selected.Set the Name to year2 and click Add




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Set the Name to make1 and click Add46. Right-click the white area and click Delete Image Type


Icon Design: Diamond48. Save the file and close the icon window


Set the Name to make2 and click Add51. Right-click the white area and click Delete Image Type


Icon Design: Diamond53. Save the file and close the icon window


Set the Name to model1 and click Add56. Right-click the white area and click Delete Image Type



60. In the Templates list, make sure Icon File is selected.Set the Name to model2 and click Add




Set the Name to category1 and click Add66. Right-click the white area and click Delete Image Type



70. In the Templates list, make sure Icon File is selected.Set the Name to category2 and click Add


Icon Design: Minus

73. Save the file and close the icon window74. In the Solution Explorer, right-click Form1.cs and click Rename


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75. Type Central.cs and press Enter twice to display the Central form76. From the Components section of the Toolbox, click ImageList and click the form

77. In the Properties window, click (Name) and type imgAutoParts78. Click the ellipsis button of the Images field

79. In the Image Collection Editor, click Add

80. Locate the folder that contains the icons you created and display it in the Look Incombo box81. Select cpap1.ico and click Open

82. In the same way, add the other pictures in the following order: cpap2.ico, year1.ico,year2.ico, make1.ico, make2.ico, model1.ico, model2.ico, category1.ico, and

category1.ico

Image Collection Editor83. Click OK


College Park Auto Parts - Form DesignControl Text Name Other Properties

Label Label College Park Auto-Parts Font: Times New Roman,20.25pt, style=Bold

ForeColor: BluePanel Height: 2

GroupBox GroupBox Part IdentificationTreeView TreeView tvwAutoParts ImageList: imgAutoParts

GroupBox GroupBox Available PartsListView ListView lvwAutoParts FullRowSelect: True

GridLines: TrueView: Details

Columns (Name) Text TextAlign WidthcolPartNumber Part #

colPartName Part Name 300colUnitPrice Unit Price Right 80

GroupBox GroupBox Customer Order - Selected PartsLabel Label Part #

Label Label Part NameLabel Label Unit Price

Label Label QtyLabel Label Sub Total

TextBox TextBox txtPartNumberTextBox TextBox txtPartName

TextBox TextBox 0.00 txtUnitPrice TextAlign: RightTextBox TextBox 0 txtQuantity TextAlign: Right

TextBox TextBox 0.00 txtSubTotal TextAlign: RightButton Button Add/Select btnAdd

ListView ListView lvwSelectedParts FullRowSelect: TrueGridLines: True


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View: DetailsColumns (Name) Text TextAlign Width

colPartNumberSelected Part # 45colPartNameSelected Part Name 274

colUnitPriceSelected Unit Price Right 58

colQuantitySelected Qty Right 28colSubTotalSelected Sub-Total Right 58GroupBox GroupBox Order Summary

Button Button New Au&to Part... btnNewAutoPartLabel Label Receipt #:

TextBox TextBox txtSaveButton Button Save btnSave

Label Label Tax Rate:TextBox TextBox 7.75 txtTaxRate TextAlign: Right

Label Label %Label Label Parts Total:

TextBox TextBox 0.00 txtPartsTotal TextAlign: RightButton Button &New Customer Order btnNewCustomerOrder

Label Label Receipt #:TextBox TextBox txtOpen

Button Button Save btnOpenLabel Label Tax Amount:

TextBox TextBox 0.00 txtTaxAmount TextAlign: RightLabel Label Order Total:

TextBox TextBox 0.00 txtOrderTotal TextAlign: RightButton Button Close btnClose

85. Click the Available Parts list view86. In the Properties window, click the Events button and, in the Events section, double-

click DoubleClick87. Implement the event as follows:

private void lvwAutoParts_DoubleClick(object sender, EventArgs e){

ListViewItem lviAutoPart = lvwAutoParts.SelectedItems[0];

if( (lvwAutoParts.SelectedItems.Count == 0) ||(lvwAutoParts.SelectedItems.Count > 1) )

return;

txtPartNumber.Text = lviAutoPart.Text;txtPartName.Text = lviAutoPart.SubItems[1].Text;

txtUnitPrice.Text = lviAutoPart.SubItems[2].Text;

txtQuantity.Text = "1";txtSubTotal.Text = lviAutoPart.SubItems[2].Text;


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txtQuantity.Focus();

}

88. Return to the Central form

89. Click the Unit Price text box and, in the Events section of the Properties window,double-click Leave90. Implement the event as follows:

private void txtUnitPrice_Leave(object sender, EventArgs e){

double UnitPrice = 0.00D;


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int Quantity = 0;

double SubTotal = 0.00D;

try

{


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UnitPrice = double.Parse(txtUnitPrice.Text);}

catch (FormatException){

MessageBox.Show("Invalid Unit Price!");

}

try { Quantity = int.Parse(txtQuantity.Text); }


MessageBox.Show("Invalid Quandtity!");}

SubTotal = UnitPrice * Quantity;

txtSubTotal.Text = SubTotal.ToString("F");}

internal void CalculateOrder()

{// Calculate the current total order and update the order

double PartsTotal = 0.00;double TaxRate = 0.00;

double TaxAmount = 0.00;double OrderTotal = 0.00;

ListViewItem lviSelectedPart = lvwSelectedParts.Items[0];

foreach (ListViewItem lvi in lvwSelectedParts.Items)

{ListViewItem.ListViewSubItem SubItem = lvi.SubItems[4];

PartsTotal += double.Parse(SubItem.Text);

}

try{

TaxRate = double.Parse(txtTaxRate.Text) / 100;}


MessageBox.Show("Invalid Tax Rate");}

TaxAmount = PartsTotal * TaxRate;

OrderTotal = PartsTotal + TaxAmount;


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txtTotalOrder.Text = PartsTotal.ToString("F");txtTaxAmount.Text = TaxAmount.ToString("F");

txtOrderTotal.Text = OrderTotal.ToString("F");}

91. Return to the Central form and click the Qty text box92. In the Events section of the Properties, click Leave, then click the arrow of itscombo box and select txtUnitPrice_Leave

93. Return to the Central form94. Click the Selected Part list view (the list view in the bottom-right section of the

form)95. In the Events section of the Properties window, double-click DoubleClick


private void lvwSelectedParts_DoubleClick(object sender, EventArgs e)

{ ListViewItem lviSelectedPart = lvwSelectedParts.SelectedItems[0];

if( (lvwSelectedParts.SelectedItems.Count == 0) ||

(lvwSelectedParts.SelectedItems.Count > 1) )return;

txtPartNumber.Text = lviSelectedPart.Text;

txtPartName.Text = lviSelectedPart.SubItems[1].Text;txtUnitPrice.Text = lviSelectedPart.SubItems[2].Text;

txtQuantity.Text = lviSelectedPart.SubItems[3].Text;txtSubTotal.Text = lviSelectedPart.SubItems[4].Text;

lvwSelectedParts.Items.Remove(lviSelectedPart);

CalculateOrder();}

97. In the Solution Explorer, right-click CollegeParkAutoParts3 -> Add -> Class...

98. Set the name to PartDescription and press Enter99. To create a class that can hold a structured item of a list, change the class as follows:

using System;

namespace CollegeParkAutoParts3{

[Serializable]public class PartDescription

{// These members will be used to define a car part


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private long ID;private int yr;

private string mk;private string mdl;

private string cat;

private string name;

Wawan

wedding

pitutprivate double price;

public PartDescription()

{this.ID = 0;

this.yr = 1960;this.mk = "";

this.mdl = "";this.name = "Unknown";


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this.price = 0.00;}

public PartDescription(long code, int year, string make,

string model, string type,

string desc, double UPrice){this.ID = code;

this.yr = year;this.mk = make;

this.mdl = model;this.cat = type;

this.name = desc;this.price = UPrice;

}

public long PartNumber{

get { return ID; }set { ID = value; }

}

public int Year{

get { return yr; }set { yr = value; }

}

public string Make{

get { return mk; }set { mk = value; }

}

public string Model{

get { return mdl; }set { mdl = value; }

}

public string Category{

get { return cat; }set { cat = value; }

}


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public string PartName{

get { return name; }set { name = value; }

}

public double UnitPrice{

get { return (price < 0) ? 0.00 : price; }set { price = value; }

}

public override string ToString(){

return this.PartNumber + " " +this.Year.ToString() + " " +

this.Make + " " +this.Model + " " +

this.Category + " " +this.PartName + " " +

this.UnitPrice;}

}}

100. In the Solution Explorer, right-click CollegeParkAutoParts3 -> Add -> Class...

101. Set the name to PartsOrdered and press Enter102. To create another class intended for a list, change the document as follows:

using System;


[Serializable]public class PartsOrdered

{public long PartNumber;

public string PartName;public double UnitPrice;

public int Quantity;public double SubTotal;

}}


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Wawan

wedding

pitut103. Save all104. Display the Part Editor form and double-click the Submit button105. Implement the event as follows:using System;

using System.Collections.Generic;using System.ComponentModel;

using System.Data;using System.Drawing;

using System.Text;using System.Windows.Forms;

using System.IO;using System.Runtime.Serialization.Formatters.Binary;

namespace CollegeParkAutoParts3


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{public partial class PartEditor : Form

{List lstAutoParts;

. . . No Change

private void btnSubmit_Click(object sender, EventArgs e)

{FileStream stmAutoParts = null;

BinaryFormatter bfmAutoParts = new BinaryFormatter();

// If this directory doesn't exist, create itDirectory.CreateDirectory(@"C:\College Park Auto Parts");

// This is the file that holds the list of itemsstring FileName = @"C:\College Park Auto Parts\Parts.prs";

// Create a random number that will be used to identify the item

Random rnd = new Random();txtPartNumber.Text = rnd.Next(100000, 999999).ToString();

// Make sure the user had selected a make

if (cbxYears.Text.Length == 0){

MessageBox.Show("You must specify the year");cbxYears.Focus();

return;}

// Make sure the user had selected a make

if (cbxMakes.Text.Length == 0){

MessageBox.Show("You must specify the car name");cbxMakes.Focus();

return;}

// Make sure the user had selected a model

if (cbxModels.Text.Length == 0){

MessageBox.Show("You must specify the model of the car");cbxModels.Focus();

return;}

// Make sure the user had selected the part category


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if (cbxCategories.Text.Length == 0){

MessageBox.Show("You must specify the part's category");cbxCategories.Focus();

return;

}

// Make sure the user had entered a name/description

if (txtPartName.Text.Length == 0){

MessageBox.Show("You must enter the name (or a " +"short description) for the part");

txtPartName.Focus();return;

}

// Make sure the user had typed a price for the itemif (txtUnitPrice.Text.Length == 0)

{MessageBox.Show("You must enter the price of the item");

txtUnitPrice.Focus();return;

}

// Before saving the new part, find out if there was// already a file that holds the list of parts

// If that file exists, open it and store its parts// in our lstParts variable

if (File.Exists(FileName)){

stmAutoParts = new FileStream(FileName,FileMode.Open,

FileAccess.Read,FileShare.Read);

try

{// Retrieve the list of items from file

lstAutoParts =(List)bfmAutoParts.Deserialize(stmAutoParts);

}finally

{stmAutoParts.Close();

}}


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// Create the part

PartDescription part = new PartDescription();part.PartNumber = long.Parse(txtPartNumber.Text);

part.Year = int.Parse(cbxYears.Text);

part.Make = cbxMakes.Text;part.Model = cbxModels.Text;part.Category = cbxCategories.Text;

part.PartName = txtPartName.Text;part.UnitPrice = double.Parse(txtUnitPrice.Text);

// Call the Add method of our collection class to add the part

lstAutoParts.Add(part);

// Save the liststmAutoParts = new FileStream(FileName,

FileMode.Create,FileAccess.Write,

FileShare.Write);

try{

bfmAutoParts.Serialize(stmAutoParts, lstAutoParts);

// After saving the item, reset the formcbxYears.Text = "";

cbxMakes.Text = "";cbxModels.Text = "";

cbxCategories.Text = "";txtPartName.Text = "";

txtUnitPrice.Text = "0.00";txtPartNumber.Text = rnd.Next(100000, 999999).ToString();

}finally


}}

}}


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106. Display the Centralform

107. Right-click the form and click View Code108. Add the following namespaces in the top section of the file:

using System;using System.Collections.Generic;

using System.ComponentModel;using System.Data;

using System.Drawing;using System.Text;

using System.Windows.Forms;using System.IO;

using System.Runtime.Serialization.Formatters.Binary;

109. Return to the Central form and double-click the Save button110. Implement its event as follows:

private void btnSave_Click(object sender, EventArgs e){

BinaryFormatter bfmCustomerOrder = new BinaryFormatter();


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// We will store our files in the following folder

string strDirectory = @"C:\College Park Auto Parts\Receipts";DirectoryInfo dirInfo = new DirectoryInfo(strDirectory);

string strFilename = strDirectory + "\\" + txtSave.Text + ".cap";

List lstOrderedParts = null;

if (lvwSelectedParts.Items.Count == 0)

return;else

{lstOrderedParts = new List();

for (int i = 0; i < lvwSelectedParts.Items.Count; i++)

{ PartsOrdered part = new PartsOrdered();

part.PartNumber = long.Parse(lvwSelectedParts.Items[i].Text);

part.PartName = lvwSelectedParts.Items[i].SubItems[1].Text;part.UnitPrice = double.Parse(lvwSelectedParts.Items[i].SubItems[2].Text);

part.Quantity = int.Parse(lvwSelectedParts.Items[i].SubItems[3].Text);part.SubTotal = double.Parse(lvwSelectedParts.Items[i].SubItems[4].Text);

lstOrderedParts.Add(part);}

FileStream stmCustomerOrder = new FileStream(strFilename, FileMode.Create);


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try

{

bfmCustomerOrder.Serialize(stmCustomerOrder, lstOrderedParts);

}finally

{stmCustomerOrder.Close();

}}

}

111. Save all112. Display the Part Editor form and double-click the Makes combo box

113. Implement its SelectedIndexChanged event as follows:

private void cbxMakes_SelectedIndexChanged(object sender, EventArgs e)

{cbxModels.Text = "";

cbxModels.Items.Clear();

foreach (PartDescription part in lstAutoParts)


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if (part.Make == cbxMakes.Text)if (!cbxModels.Items.Contains(part.Model))

cbxModels.Items.Add(part.Model);}

114. Display the Central form and double-click the Add/Select button115. Implement the event as follows:

private void btnAdd_Click(object sender, EventArgs e)

{if (txtPartNumber.Text.Length == 0)

{MessageBox.Show("There is no part to be added to the order");

return;}

foreach (PartDescription part in lstAutoParts)

{if (part.PartNumber == long.Parse(txtPartNumber.Text))

{ListViewItem lviSelectedPart =

new ListViewItem(part.PartNumber.ToString());

lviSelectedPart.SubItems.Add(part.PartName);lviSelectedPart.SubItems.Add(part.UnitPrice.ToString());

lviSelectedPart.SubItems.Add(txtQuantity.Text);lviSelectedPart.SubItems.Add(txtSubTotal.Text);

lvwSelectedParts.Items.Add(lviSelectedPart);}

}

CalculateOrder();}

116. Return to the Central form and double-click the Open button

117. Implement its event as follows:

private void btnOpen_Click(object sender, EventArgs e)

{List lstReceipts = null;

BinaryFormatter bfmReceipts = new BinaryFormatter();FileStream stmReceipts = null;

string strDirectory = @"C:\College Park Auto Parts\Receipts";


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string strFilename = "";

DirectoryInfo dirReceipts = new DirectoryInfo(strDirectory);FileInfo[] fleReceipts = dirReceipts.GetFiles();

if (txtOpen.Text.Length == 0){MessageBox.Show("You must enter a receipt number\n" +

"There is no receipt number to " +"open a customer's order");

txtOpen.Focus();return;

}

if (fleReceipts.Length == 0){

MessageBox.Show("There is no customer order to open");txtOpen.Focus();

return;}

else{

lvwAutoParts.Items.Clear();lvwSelectedParts.Items.Clear();

strFilename = strDirectory + "\\" + txtOpen.Text + ".cap";

if (File.Exists(strFilename))

{try

{stmReceipts = new FileStream(strFilename, FileMode.Open);

lstReceipts =(List)bfmReceipts.Deserialize(stmReceipts);

foreach (PartsOrdered part in lstReceipts)

{ListViewItem lviReceiptPart =

new ListViewItem(part.PartNumber.ToString());

lviReceiptPart.SubItems.Add(part.PartName);lviReceiptPart.SubItems.Add(part.UnitPrice.ToString());

lviReceiptPart.SubItems.Add(part.Quantity.ToString());lviReceiptPart.SubItems.Add(part.SubTotal.ToString());

lvwSelectedParts.Items.Add(lviReceiptPart);}


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}finally

{stmReceipts.Close();

}

CalculateOrder();txtSave.Text = txtOpen.Text;

}else

MessageBox.Show("There is no customer order with that receipt number");}

}

118. Save the file119. Display the Part Editor form and double-click an unoccupied area of its body

120. Implement the Load event as follows:

private void PartEditor_Load(object sender, EventArgs e)

{// Since all values seem ready, prepare to process the item

lstAutoParts = new List();BinaryFormatter bfmAutoParts = new BinaryFormatter();

for (int i = DateTime.Today.Year + 1; i >= 1960; i--)

cbxYears.Items.Add(i.ToString());

// Create a random number that will be used to identify the itemRandom rnd = new Random();

txtPartNumber.Text = rnd.Next(100000, 999999).ToString();

// This is the file that holds the list of partsstring FileName = @"C:\College Park Auto Parts\Parts.prs";

if (File.Exists(FileName))

{FileStream stmAutoParts = new FileStream(FileName,

FileMode.Open,FileAccess.Read,

FileShare.Read);

try{

// Retrieve the list of items from filelstAutoParts =


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(List)bfmAutoParts.Deserialize(stmAutoParts);

// Display the car manufacturers in the Make combo box

for (int i = 0; i < lstAutoParts.Count; i++)

{ PartDescription part = (PartDescription)lstAutoParts[i];

if (!cbxMakes.Items.Contains(part.Make))cbxMakes.Items.Add(part.Make);

}

// Display the pats categories in the Category combo boxfor (int i = 0; i < lstAutoParts.Count; i++)

{PartDescription part = (PartDescription)lstAutoParts[i];

if (!cbxCategories.Items.Contains(part.Category))

cbxCategories.Items.Add(part.Category);}

}finally


}}

}

121. Display the Central form and click the Part # text box122. In the Events section of the Properties window, double-click Leave and implement

the event as follows:

private void txtPartNumber_Leave(object sender, EventArgs e)

{// We will allow the user to enter a part number

// In the beginning, we assume that the user// had entered an invalid number

bool found = false;// This will represent the part found, if any

PartDescription PartFound = null;

// After the user had entered a part number,// check the whole list of parts

foreach (PartDescription part in lstAutoParts){


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// If you find a part that holds the number the user had enteredif( part.PartNumber == long.Parse(txtPartNumber.Text) )

{// Mark that part

PartFound = part;

// And update the flag that specifies// that the part has been foundfound = true;

}// If the part number was not found, check the next

} // If no part has that number, the found flag keeps marked as false

// If a part with that number was found...if (found == true)

{// Show the corresponding part name and unit price

txtPartName.Text = PartFound.PartName;txtUnitPrice.Text = PartFound.UnitPrice.ToString("F");

txtQuantity.Text = "1";txtSubTotal.Text = PartFound.UnitPrice.ToString("F");

// Give focus to the quantity in case the user was to increase ittxtQuantity.Focus();

}else

{// Since no part with that number was found,

// reset the text boxestxtPartName.Text = "";

txtUnitPrice.Text = "0.00";txtQuantity.Text = "0";

txtSubTotal.Text = "0.00";

// Let the user know that the part number that// was entered is not in the list

MessageBox.Show("There is no part with that number");}

}

123. Return to the Central form and double-click the New Auto Part button124. Implement the event as follows:

using System;using System.Collections.Generic;

using System.ComponentModel;using System.Data;


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using System.Drawing;using System.Text;

using System.Windows.Forms;using System.IO;

using System.Runtime.Serialization.Formatters.Binary;


public partial class Central : Form{

int iFileName;List lstAutoParts;

public Central()

{InitializeComponent();

}

void ShowAutoParts(){

tvwAutoParts.Nodes.Clear();TreeNode nodRoot =

tvwAutoParts.Nodes.Add("College Park Auto-Parts","College Park Auto-Parts", 0, 1);

// Show the years nodesfor (int years = DateTime.Today.Year + 1; years >= 1960; years--)

nodRoot.Nodes.Add(years.ToString(), years.ToString(), 2, 3);

tvwAutoParts.SelectedNode = nodRoot;// Expand the root node

tvwAutoParts.ExpandAll();

lstAutoParts = new List();BinaryFormatter bfmAutoParts = new BinaryFormatter();

// This is the file that holds the list of auto parts

string FileName = @"C:\College Park Auto Parts\Parts.prs";

if (File.Exists(FileName)){

FileStream stmAutoParts = new FileStream(FileName,FileMode.Open,

FileAccess.Read,FileShare.Read);

try{


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// Retrieve the list of parts from filelstAutoParts =

(List)bfmAutoParts.Deserialize(stmAutoParts);

// Show the makes nodesforeach (TreeNode nodYear in nodRoot.Nodes){

List lstMakes = new List();


if (nodYear.Text == part.Year.ToString()){

if (!lstMakes.Contains(part.Make))lstMakes.Add(part.Make);

}}

foreach (string strMake in lstMakes)

nodYear.Nodes.Add(strMake, strMake, 4, 5);}

// Showing the models nodes

foreach (TreeNode nodYear in nodRoot.Nodes){

foreach (TreeNode nodMake in nodYear.Nodes){

List lstModels = new List();


if ((nodYear.Text == part.Year.ToString()) &&

(nodMake.Text == part.Make)){

if (!lstModels.Contains(part.Model))lstModels.Add(part.Model);

}

}

foreach (string strModel in lstModels)nodMake.Nodes.Add(strModel, strModel, 6, 7);

}}


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// Showing the categories nodes

foreach (TreeNode nodYear in nodRoot.Nodes){

foreach (TreeNode nodMake in nodYear.Nodes)

{ foreach (TreeNode nodModel in nodMake.Nodes){

List lstCategories = new List();


if ((nodYear.Text == part.Year.ToString()) &&

(nodMake.Text == part.Make) &&(nodModel.Text == part.Model))

{if (!lstCategories.Contains(part.Category))

lstCategories.Add(part.Category);}

}

foreach (string strCategory in lstCategories)nodModel.Nodes.Add(strCategory,

strCategory, 8, 9);}

}}

}finally


}}

}

private void btnNewAutoPart_Click(object sender, EventArgs e){

PartEditor editor = new PartEditor();

if (editor.ShowDialog() == DialogResult.Cancel)ShowAutoParts();

}}

}


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125. Display the Central form and double- click the New Customer Order button126. Implement the event as follows:

private void btnNewCustomerOrder_Click(object sender, EventArgs e)

{ // We will store our files in the following folderstring strDirectory = @"C:\College Park Auto Parts\Receipts";

DirectoryInfo dirInfo = Directory.CreateDirectory(strDirectory);

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

// If there is no file in the directory,

// then we will use 1000 as the first file nameif (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;}

txtSave.Text = iFileName.ToString();

lvwAutoParts.Items.Clear();

lvwSelectedParts.Items.Clear();}

127. Display the Central form and double-click an unoccupied area of its body

128. Define a new method and implement the Load event as follows:

private void Central_Load(object sender, EventArgs e)

{ShowAutoParts();

btnNewCustomerOrder_Click(sender, e);}

129. Return to the Central form and click the tree view


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130. In the Properties window, click the Events button and, in the Events section,double-click NodeMouseClick


private void tvwAutoParts_NodeMouseClick(object sender,TreeNodeMouseClickEventArgs e){

TreeNode nodClicked = e.Node;

if (nodClicked.Level == 4)lvwAutoParts.Items.Clear();

try

{foreach (PartDescription part in lstAutoParts)

{ if ((part.Category == nodClicked.Text) &&

(part.Model == nodClicked.Parent.Text) &&(part.Make == nodClicked.Parent.Parent.Text) &&

(part.Year.ToString() == nodClicked.Parent.Parent.Parent.Text)){

ListViewItem lviAutoPart =new ListViewItem(part.PartNumber.ToString());

lviAutoPart.SubItems.Add(part.PartName);

lviAutoPart.SubItems.Add(part.UnitPrice.ToString("F"));lvwAutoParts.Items.Add(lviAutoPart);

}}

}catch (NullReferenceException)

{}

}

132. Return to the Central form and double-click the Close button133. Implement the event as follows:

private void btnClose_Click(object sender, EventArgs e){

Close();}

134. Execute the application


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135. Click the New Auto Part button and use the Part Editor to create a few parts (let thecomputer generate the part numbers)

136. Close the Part Editor

137. Create a few customer part orders and save them:

College Park Auto Parts: Customer Order

College Park Auto Parts: Part Selection138. Close the forms and return to your programming environment

139. Execute the application again and open a previously saved order140. Close the forms and return to your programming environment

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Documents

In the Events Section of the Properties Window, Double-click Double Click