Introduction

You can create a fully functional database using one or a combination of the collection classes available in the .NET Framework (or any other library). Those classes provides all the properties and methods you would use to manage the records of the database, including creating new records, looking for/reading/finding, editing/updating, and deleting records. To hold (that is, to save and open) the records of such a database, you can use XML serialization.

Practical Learning: Introducing Data Sets

1. In your computer, create a folder named College Park Auto-Parts. If you are using Microsoft Windows, create that folder in your C:\ drive
2. Save the following image in that folder

   

3. Start Microsoft Visual Studio
4. On the Visual Studio (2022) dialog box, click Create a New Project
5. On the Create a New Project wizard page, in the languages combo box, select C# and, in the list of projects templates, click Windows Forms App
6. Click Next
7. In the Configure Your New Project wizard page, change the Project Name to CollegeParkAutoParts2
8. Accept or change the project Location.
   In the Framework combo box, select the Latest version (.NET 7.0 (Long Term Support)).
   Click Create

A Class for Auto-Parts

This is going to be a list-based. Such a list needs to know the type of values it will deal with. For our application, we will use a class that has properties that each represents one detail about an auto-part.

Practical Learning: Creating a Class

1. To create a class, in the Solution Explorer, right-click CollegeParkAutoParts2 -> Add -> Class...
2. In the middle list of of the Add New Item dialog box, make sure Class is selected.
   Change the file Name to AutoPart
3. Click Add
4. Change the document as follows:

   namespace CollegeParkAutoParts2
   {
       public class AutoPart
       {
           public long    PartNumber  { get; set; }
           public int     Year        { get; set; }
           public string? Make        { get; set; }
           public string? Model       { get; set; }
           public string? Category    { get; set; }
           public string? PartName    { get; set; }
           public double UnitPrice    { get; set; }
           public string? PictureFile { get; set; }
       }
   }

The Vehicles Makes

To identify an auto-part, you use many pieces of information. To start, you must identify the car that uses the auto-part, and a car's identity starts with the manufactuter. In ou AutoPart class, a car manufactuter is represented by the Make property. Our application will need a form to allow the user to provide a vehicle make.

Practical Learning: Introducing Vehicles Makes

1. To create a dialog box, on the main menu, click Project -> Add Form (Windows Forms)...
2. Change the Name to Make
3. Click Add
4. Design the form as follows:

   

   Control		(Name)	Text	Additional Properties
   Label			&Make:
   TextBox		txtMake
   Button		btnOK	&OK	DialogResult: OK
   Button		btnCancel	&Cancel	DialogResult: Cancel

5. Click an unoccupied area of the form and, in the Properties window, change the following characteristics:
   FormBorderStyle: FixedDialog
   StartPosition: CenterScreen
   AcceptButton: btnOK
   CancelButton: btnCancel
   MaximizeBox: False
   MinimizeBox: False
   ShowInTaskbar: False

Vehicles Models

While the manufacturer of a vehicle is a business, a company usually makes many vehicles. A particular vehicle is known as a model. We will create a form that a user can use to specify the model of a car.

Practical Learning: Introducing Vehicles Models

1. To create a dialog box, on the main menu, click Project -> Add Form (Windows Forms)...
2. Change the Name to Model
3. Click Add
4. Design the form as follows:

   

   Control		(Name)	Text	Additional Properties
   Label			&Model:
   TextBox		txtModel
   Button		btnOK	&OK	DialogResult: OK
   Button		btnCancel	&Cancel	DialogResult: Cancel

5. Click an unoccupied area of the form and, in the Properties window, change the following characteristics:
   FormBorderStyle: FixedDialog
   StartPosition: CenterScreen
   AcceptButton: btnOK
   CancelButton: btnCancel
   MaximizeBox: False
   MinimizeBox: False
   ShowInTaskbar: False

Items Categories

Normally, there are various ways to characterize a car part. We will keep our application simple and use only a category for each part.

Practical Learning: Setting Items Categories

1. To create a dialog box, on the main menu, click Project -> Add Windows Form...
2. Set the name to Category
3. Click Add
4. Design the form as follows:

   

   Control		(Name)	Text	Additional Properties
   Label			C&ategory:
   TextBox		txtCategory
   Button		btnOK	&OK	DialogResult: OK
   Button		btnCancel	&Cancel	DialogResult: Cancel

5. Click an unoccupied area of the form and, in the Properties window, change the following characteristics:
   FormBorderStyle: FixedDialog
   StartPosition: CenterScreen
   AcceptButton: btnOK
   CancelButton: btnCancel
   MaximizeBox: False
   MinimizeBox: False
   ShowInTaskbar: False

Creating Records

The primary purpose of the business of our application is to sell auto parts. So it is necessary to create records for those parts. To make this happen, we had already created a table for auto parts. Now we need a graphical object, a form, to manager the records.

Practical Learning: Preparing an Items Inventory

1. To create a new form, in the Solution Explorer, right-click CollegeParkAutoParts1 -> Add -> Form (Windows Forms)...
2. Change the Name to StoreItemNew
3. Click Add
4. Design the form as follows:

   

   Control	(Name)	Text	Additional Properties
   Label			&Part #:
   TextBox		txtPartNumber
   Button		btnSelectPicture	&Select Picture...
   Label			&Year:
   Combo Box		cbxYears
   Picture Box		pbxPartImage		BorderStyle: FixedSingle SizeMode: AutoSize
   Label			&Make:
   Combo Box		cbxMakes
   Button		btnNewMake	New M&ke...
   Label			M&odel
   Combo Box		cbxModels
   Button		btnNewModel	New Mo&del...
   Label			Ca&tegory:
   Combo Box		cbxCategories
   Button		btnNewCategory	New Cat&egory...
   Label			Part Na&me:
   Text Box		txtPartName		ScrollBars: Vertical Multiline: True
   Label			&Unit Price:
   Text Box		txtUnitPrice		TextAlign: Right
   Label			____________________
   Button		btnSaveAutoPart	Sa&ve Auto-Part
   Button		Close	btnClose
   Open File Dialog		ofdPictureFile

5. Double-click an unoccupied area of the form to generate its Load event
6. Return to the form and double-click the &Select Picture... button
7. Return to the form and double-click the Make combo box to generate its SelectedIndexChanged event
8. Return to the form and double-click the New M&ake... button
9. Return to the form and double-click the New Mo&del... button
10. Return to the form and double-click the New Cat&egory... button
11. Return to the form and double-click the Sa&ve Auto-Part button
12. Return to the form and double-click the Close button
13. Change the document as follows:

    using System.Xml.Serialization;
    
    namespace CollegeParkAutoParts
    {
        public partial class StoreItemNew : Form
        {
            /* This property is used to hold the list of auto-parts of our application.
             * (We didn't have to use a global variable. We could have used local variables.) */
            List<AutoPart> AutoParts { get; set; } = new List<AutoPart>();
    
            public StoreItemNew()
            {
                InitializeComponent();
            }
    
            /* This function is used to reset the form.
             * It can be called when necessary. */
            private void InitializeAutoParts()
            {
                // This file is the repository of our database
                string strFileName = @"C:\College Park Auto-Parts\AutoParts.xml";
                // We will use XML serialization to manage the records of our database
                XmlSerializer xsAutoParts = new XmlSerializer(typeof(List<AutoPart>));
    
                /* Show the years in the top combo box.
                 * We will consider only the cars made in the last 20 years. */
                for (int year = DateTime.Today.Year + 1; year >= DateTime.Today.Year - 20; year--)
                    cbxYears.Items.Add(year);
    
                // Check whether the file that holds the store inventory was created already
                if (File.Exists(strFileName))
                {
                    Random rndNumber = new();
    
                    cbxMakes.Items.Clear();
                    cbxModels.Items.Clear();
                    cbxCategories.Items.Clear();
                    txtPartName.Text = string.Empty;
                    txtUnitPrice.Text = string.Empty;
                    txtPartNumber.Text = rndNumber.Next(100000, 999999).ToString();
    
                    // If the inventory file exists, open it
                    using (FileStream fsAutoParts = new FileStream(strFileName,
                                                                    FileMode.Open,
                                                                    FileAccess.Read,
                                                                    FileShare.Read))
                    {
                        // Retrieve the list of items from file
                        AutoParts = (List<AutoPart>)xsAutoParts.Deserialize(fsAutoParts)!;
    
                        // Display the cars manufacturers in the combo box
                        for (int i = 0; i < AutoParts.Count; i++)
                        {
                            // Make sure the list box doesn't yet have the category being added
                            if (!cbxMakes.Items.Contains(AutoParts[i].Make))
                                cbxMakes.Items.Add(AutoParts[i].Make);
                        }
    
                        // Display the categories in the box
                        for (int i = 0; i < AutoParts.Count; i++)
                        {
                            // Make sure the list box doesn't yet have the category being added
                            if (!cbxCategories.Items.Contains(AutoParts[i].Category))
                                cbxCategories.Items.Add(AutoParts[i].Category);
                        }
                    }
                }
    
                lblPictureFile.Text = @"C:\College Park Auto-Parts\Generic.png";
                pbxPartImage.Image  = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
    
                Width  = pbxPartImage.Right  + 40;
                Height = pbxPartImage.Bottom + 75;
            }
    
            private void StoreItemNew_Load(object sender, EventArgs e)
            {
                InitializeAutoParts();
            }
    
            private void btnSelectPicture_Click(object sender, EventArgs e)
            {
                if(ofdPictureFile.ShowDialog() == DialogResult.OK)
                {
                    lblPictureFile.Text = ofdPictureFile.FileName;
                    pbxPartImage.Image  = Image.FromFile(ofdPictureFile.FileName);
                }
                else
                    pbxPartImage.Image  = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
    
                Width  = pbxPartImage.Right  + 40;
                Height = pbxPartImage.Bottom + 75;
            }
    
            private void cbxMakes_SelectedIndexChanged(object sender, EventArgs e)
            {
                cbxModels.Text = "";
                cbxModels.Items.Clear();
    
                foreach (AutoPart part in AutoParts)
                    if (part.Make == cbxMakes.Text)
                        if (!cbxModels.Items.Contains(part.Model))
                            cbxModels.Items.Add(part.Model);
            }
    
            private void btnNewMake_Click(object sender, EventArgs e)
            {
                Make editor = new Make();
    
                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 list
                        if (cbxMakes.Items.Contains(strMake))
                            MessageBox.Show(strMake + " is already in the list.",
                                            "College Park Auto-Parts",
                                            MessageBoxButtons.OK, MessageBoxIcon.Information);
                        else
                        {
                            // Since this is a new category, add it to the combo box
                            cbxMakes.Items.Add(strMake);
                        }
    
                        cbxMakes.Text = strMake;
                    }
                }
            }
    
            private void btnNewModel_Click(object sender, EventArgs e)
            {
                Model editor = new();
    
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    if (editor.txtModel.Text.Length > 0)
                    {
                        string strModel = editor.txtModel.Text;
    
                        // Make sure the category is not yet in the list
                        if (cbxModels.Items.Contains(strModel))
                            MessageBox.Show(strModel + " is already in the list.",
                                            "College Park Auto-Parts",
                                            MessageBoxButtons.OK, MessageBoxIcon.Information);
                        else
                        {
                            // Since this is a new category, add it to the combo box
                            cbxModels.Items.Add(strModel);
                        }
    
                        cbxModels.Text = strModel;
                    }
                }
            }
    
            private void btnNewCategory_Click(object sender, EventArgs e)
            {
                var editor = new Category();
    
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    if (editor.txtCategory.Text.Length > 0)
                    {
                        string strCategory = editor.txtCategory.Text;
    
                        // Make sure the category is not yet in the list
                        if (cbxCategories.Items.Contains(strCategory))
                            MessageBox.Show(strCategory + " is already in the list.",
                                            "College Park Auto-Parts",
                                         MessageBoxButtons.OK, MessageBoxIcon.Information);
                        else
                        {
                            // Since this is a new category, add it to the combo box
                            cbxCategories.Items.Add(strCategory);
                        }
    
                        cbxCategories.Text = strCategory;
                    }
                }
            }
    
            private void btnSaveAutoPart_Click(object sender, EventArgs e)
            {
                // Make sure the user had selected a year
                if( string.IsNullOrEmpty(cbxYears.Text) )
                {
                    MessageBox.Show("You must specify the year.",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                // Make sure the user had selected a make
                if(string.IsNullOrEmpty(cbxMakes.Text) )
                {
                    MessageBox.Show("You must specify the car name.",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                // Make sure the user had selected a model
                if (string.IsNullOrEmpty(cbxModels.Text) )
                {
                    MessageBox.Show("You must specify the model of the car.",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                // Make sure the user had entered a name/description
                if (string.IsNullOrEmpty(txtPartName.Text) )
                {
                    MessageBox.Show("You must enter the name (or a " +
                                    "short description) for the part.",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtPartName.Focus();
                    return;
                }
    
                // Make sure the user had typed a price for the item
                if( string.IsNullOrEmpty(txtUnitPrice.Text) )
                {
                    MessageBox.Show("You must enter the price of the item.",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtUnitPrice.Focus();
                    return;
                }
                
                string strFileName = @"C:\College Park Auto-Parts\AutoParts.xml";
                XmlSerializer xsAutoParts = new XmlSerializer(typeof(List<AutoPart>));
    
                if (File.Exists(strFileName))
                {
                    // If the inventory file exists, open it
                    using (FileStream fsAutoParts = new FileStream(strFileName,
                                                                   FileMode.Open,
                                                                   FileAccess.Read,
                                                                   FileShare.Read))
                    {
                        // Retrieve the list of items from file
                        AutoParts = (List<AutoPart>)xsAutoParts.Deserialize(fsAutoParts)!;
                    }
                }
    
                AutoPart part = new AutoPart();
    
                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);
                part.PictureFile = lblPictureFile.Text;
    
                // Call the Add method of our collection class to add the part
                AutoParts.Add(part);
    
                TextWriter twAutoParts = new StreamWriter(strFileName);
                xsAutoParts.Serialize(twAutoParts, AutoParts);
                twAutoParts.Close();
    
                InitializeAutoParts();
            }
    
            private void btnClose_Click(object sender, EventArgs e)
            {
                Close();
            }
        }
    }

Editing/Updating an Auto-Part

A database requires maintenance, which consists of locating records, then editing or updaing them. We will use a form to assist the user in taking care of that.

Practical Learning: Editing/Updating a Record

1. To create a form, on the main menu of Microsoft Visual Studio, click Project and click Add Form (Windows Forms...)
2. Change the file Name to StoreItemEditor
Click Add Resize the form to have the same size as the New Store Item form Display the New Store Item form
3. Copy everything on it (you can press Ctrl + A and then press Ctrl + C)
4. Display the Store Item Editor form
5. Paste everything (you can press Ctrl + V)
6. Change the design of the form as follows:

   

   Control	(Name)	Text
   Button		btnFind	&Find
   Text Box		txtMake
   Text Box		txtModel
   Text Box		txtCategory
   Button		btnUpdateAutoPart	Up&date Auto-Part

7. Double-click an unoccupied area of the form to generate its Load event
8. Return to the form and double-click the Find button
9. Return to the form and double-click the &Select Picture... button
10. Return to the form and double-click the Up&date Auto-Part button
11. Return to the form and double-click the Close button
12. Change the document as follows:

    using System.Xml.Serialization;
    
    namespace CollegeParkAutoParts
    {
        public partial class StoreItemEditor : Form
        {
            List<AutoPart> AutoParts { get; set; } = new List<AutoPart>();
    
            public StoreItemEditor()
            {
                InitializeComponent();
            }
    
            private void InitializeAutoPart()
            {
                txtMake.Text        = string.Empty;
                txtModel.Text       = string.Empty;
                txtCategory.Text    = string.Empty;
                txtPartName.Text    = string.Empty;
                txtUnitPrice.Text   = string.Empty;
                txtPartNumber.Text  = string.Empty ;
    
                lblPictureFile.Text = @"C:\College Park Auto-Parts\Generic.png";
                pbxPartImage.Image  = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
    
                Width               = pbxPartImage.Right  + 40;
                Height              = pbxPartImage.Bottom + 75;
            }
    
            private void StoreItemEditor_Load(object sender, EventArgs e)
            {
                InitializeAutoPart();
            }
    
            private void btnFind_Click(object sender, EventArgs e)
            {
                if( string.IsNullOrEmpty(txtPartNumber.Text))
                {
                    MessageBox.Show("You must enter a (valid) number for an auto-part.",
                                    "College Park Auto-Parts", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                bool foundAutoPart        = false;
                string strFileName        = @"C:\College Park Auto-Parts\AutoParts.xml";
                XmlSerializer xsAutoParts = new XmlSerializer(typeof(List<AutoPart>));
    
                if (File.Exists(strFileName))
                {
                    using (FileStream fsAutoParts = new(strFileName, FileMode.Open, FileAccess.Read, FileShare.Read))
                    {
                        AutoParts = (List<AutoPart>)xsAutoParts.Deserialize(fsAutoParts)!;
    
                        for (int i = 0; i < AutoParts.Count; i++)
                        {
                            if (AutoParts[i].PartNumber.Equals(long.Parse(txtPartNumber.Text)))
                            {
                                foundAutoPart = true;
    
                                txtMake.Text        = AutoParts[i].Make;
                                txtModel.Text       = AutoParts[i].Model;
                                txtCategory.Text    = AutoParts[i].Category;
                                txtPartName.Text    = AutoParts[i].PartName;
                                cbxYears.Text       = AutoParts[i].Year.ToString();
                                txtUnitPrice.Text   = AutoParts[i].UnitPrice.ToString("F");
                                pbxPartImage.Image  = Image.FromFile(AutoParts[i].PictureFile!);
                                lblPictureFile.Text = AutoParts[i].PictureFile;
                                
                                break;
                            }
                        }
                    }
                }
    
                if(foundAutoPart == false)
                {
                    MessageBox.Show("There is no auto-part with that number in our records.",
                                    "College Park Auto-Parts", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    
                    lblPictureFile.Text = @"C:\College Park Auto-Parts\Generic.png";
                    pbxPartImage.Image  = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
                }
    
                Width  = pbxPartImage.Right  + 40;
                Height = pbxPartImage.Bottom + 75;
            }
    
            private void btnSelectPicture_Click(object sender, EventArgs e)
            {
                if (ofdPictureFile.ShowDialog() == DialogResult.OK)
                {
                    lblPictureFile.Text = ofdPictureFile.FileName;
                    pbxPartImage.Image  = Image.FromFile(ofdPictureFile.FileName);
                }
                else
                    pbxPartImage.Image = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
    
                Width  = pbxPartImage.Right  + 40;
                Height = pbxPartImage.Bottom + 75;
            }
    
            private void btnUpdateAutoPart_Click(object sender, EventArgs e)
            {
                string strFileName        = @"C:\College Park Auto-Parts\AutoParts.xml";
                XmlSerializer xsAutoParts = new XmlSerializer(typeof(List<AutoPart>));
    
                if (File.Exists(strFileName))
                {
                    using (FileStream fsAutoParts = new FileStream(strFileName,
                                                                    FileMode.Open,
                                                                    FileAccess.Read,
                                                                    FileShare.Read))
                    {
                        AutoParts = (List<AutoPart>)xsAutoParts.Deserialize(fsAutoParts)!;
                    }
                }
    
                for (int i = 0; i < AutoParts.Count; i++)
                {
                    if (AutoParts[i].PartNumber.Equals(long.Parse(txtPartNumber.Text)))
                    {
                        AutoParts[i].Year        = Convert.ToInt32(cbxYears.Text);
                        AutoParts[i].Make        =                 txtMake.Text;
                        AutoParts[i].Model       =                 txtModel.Text;
                        AutoParts[i].Category    =                 txtCategory.Text;
                        AutoParts[i].PartName    =                 txtPartName.Text;
                        AutoParts[i].UnitPrice   = Convert.ToDouble(txtUnitPrice.Text);
                        AutoParts[i].PictureFile =                 lblPictureFile.Text;
    
                        TextWriter twAutoParts = new StreamWriter(strFileName);
                        xsAutoParts.Serialize(twAutoParts, AutoParts);
                        twAutoParts.Close();
    
                        break;
                    }
                }
    
                InitializeAutoPart();
            }
    
            private void btnClose_Click(object sender, EventArgs e)
            {
                Close();
            }
        }
    }

Removing Records

A valuable operation of data management is to remove unwanted records. We will use a form to assist the user with this type of operation.

Practical Learning: Removing Records

1. To create a new form, on the main menu of Microsoft Visual Studio, click Project -> Add Form (Windows Forms...)
2. Type the file Name as StoreItemDelete
3. Click Add
4. Resize the form to have the same size as the Store Item Editor form
5. Display the Store Item Editor form and copy everything on it (you can press Ctrl + A and then press Ctrl + C)
6. Display the Store Item Delete form and paste everything in it (you can press Ctrl + V
7. Chang the design of the form as follows:

   

   Control		(Name)	Text	Additional Properties
   Text Box		txtYear		TextAlign: Right
   Button		btnDeleteAutoPart	Delete Auto-Part

8. Double-click an unoccupied area of the form
9. Return to the form and double-click the Find button
10. Return to the form and double-click the &Delete Auto-Part button
11. Return to the form and double-click the Close button
12. Change the document as follows:

    using System.Xml.Serialization;
    
    namespace CollegeParkAutoParts
    {
        public partial class StoreItemDelete : Form
        {
            List<AutoPart> AutoParts { get; set; } = new List<AutoPart>();
    
            public StoreItemDelete()
            {
                InitializeComponent();
            }
    
            private void InitializeAutoPart()
            {
                txtMake.Text        = string.Empty;
                txtModel.Text       = string.Empty;
                txtCategory.Text    = string.Empty;
                txtPartName.Text    = string.Empty;
                txtUnitPrice.Text   = string.Empty;
                txtPartNumber.Text  = string.Empty;
    
                lblPictureFile.Text = @"C:\College Park Auto-Parts\Generic.png";
                pbxPartImage.Image  = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
    
                Width               = pbxPartImage.Right + 40;
                Height              = pbxPartImage.Bottom + 75;
            }
    
            private void StoreItemDelete_Load(object sender, EventArgs e)
            {
                InitializeAutoPart();
            }
    
            private void btnFind_Click(object sender, EventArgs e)
            {
                if (string.IsNullOrEmpty(txtPartNumber.Text))
                {
                    MessageBox.Show("You must enter a (valid) number for an auto-part.",
                                    "College Park Auto-Parts", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                bool foundAutoPart = false;
                XmlSerializer xsAutoParts = new(typeof(List<AutoPart>));
                string strFileName = @"C:\College Park Auto-Parts\AutoParts.xml";
    
                if (File.Exists(strFileName))
                {
                    using (FileStream fsAutoParts = new(strFileName, FileMode.Open, FileAccess.Read, FileShare.Read))
                    {
                        AutoParts = (List<AutoPart>)xsAutoParts.Deserialize(fsAutoParts)!;
    
                        for (int i = 0; i < AutoParts.Count; i++)
                        {
                            if (AutoParts[i].PartNumber.Equals(long.Parse(txtPartNumber.Text)))
                            {
                                foundAutoPart       = true;
    
                                txtMake.Text        =                AutoParts[i].Make;
                                txtModel.Text       =                AutoParts[i].Model;
                                txtCategory.Text    =                AutoParts[i].Category;
                                txtPartName.Text    =                AutoParts[i].PartName;
                                txtYear.Text        =                AutoParts[i].Year.ToString();
                                txtUnitPrice.Text   =                AutoParts[i].UnitPrice.ToString("F");
                                pbxPartImage.Image  = Image.FromFile(AutoParts[i].PictureFile!);
                                lblPictureFile.Text =                AutoParts[i].PictureFile;
    
                                break;
                            }
                        }
                    }
                }
    
                if (foundAutoPart == false)
                {
                    MessageBox.Show("There is no auto-part with that number in our records.",
                                    "College Park Auto-Parts", MessageBoxButtons.OK, MessageBoxIcon.Information);
    
                    lblPictureFile.Text = @"C:\College Park Auto-Parts\Generic.png";
                    pbxPartImage.Image  = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
                }
    
                Width  = pbxPartImage.Right  + 40;
                Height = pbxPartImage.Bottom + 75;
            }
    
            private void btnDeleteAutoPart_Click(object sender, EventArgs e)
            {
                XmlSerializer xsAutoParts = new(typeof(List<AutoPart>));
                string strFileName        = @"C:\College Park Auto-Parts\AutoParts.xml";
    
                if (File.Exists(strFileName))
                {
                    using FileStream fsAutoParts = new(strFileName, FileMode.Open,
                                                       FileAccess.Read, FileShare.Read);
                    AutoParts = (List<AutoPart>)xsAutoParts.Deserialize(fsAutoParts)!;
                }
    
                for (int i = 0; i < AutoParts.Count; i++)
                {
                    if (AutoParts[i].PartNumber.Equals(long.Parse(txtPartNumber.Text)))
                    {
                        AutoParts.Remove(AutoParts[i]);
    
                        TextWriter twAutoParts = new StreamWriter(strFileName);
                        xsAutoParts.Serialize(twAutoParts, AutoParts);
                        twAutoParts.Close();
    
                        break;
                    }
                }
    
                InitializeAutoPart();
            }
    
            private void btnClose_Click(object sender, EventArgs e)
            {
                Close();
            }
        }
    }

A Central Point for an Application

You should make your application as user-friendly as possible. For example, you can add a menu or buttons on the first form. The user would then click those button to access the other forms of the application.

Practical Learning: Creating a Central Point for the Application

1. In the Solution Explorer, right-click Form1.cs and click Rename
2. Type StoreInventory (to have StoreInventory.cs) and press Enter three times to accept the name and display the form
3. From the Components section of the Toolbox, click ImageList and click the form
4. In the Properties window, click (Name) and type AutoPartsImages
5. Click the ellipsis button of the Images field
6. In the Image Collection Editor, click Add
7. Locate the folder that contains the resources for these lessons and display it in the Look In combo box
8. Select the following icons: Sign1, Sign2, Cliper1, Cliper2, Rulers1, Rulers2, Graph1, Graph2, Tool1, and Tool2
9. Click Open

   

10. Click OK
11. Click OK
12. Design the form as follows:

    

    Control		(Name)	Text	Other Properties
    Label			College Park Auto-Parts	Font: Times New Roman, 20.25pt, style=Bold ForeColor: Blue
    Panel				BackColor: Black Height: 2
    GroupBox			Part Identification
    TreeView		tvwAutoParts		ImageList: AutoPartsImages
    GroupBox			Available Parts
    ListView		lvwAutoParts		FullRowSelect: True GridLines: True View: Details
    Columns		(Name)	Text	TextAlign	Width
    		colAvailablePartNumber	Part #
    		colAvailablePartName	Part Name/Description		300
    		colAvailableUnitPrice	Unit Price	Right	80
    GroupBox			Customer Order - Selected Parts
    Label			Part #
    Label			Part Name
    Label			Unit Price
    Label			Qty
    Label			Sub Total
    TextBox		txtPartNumber
    TextBox		txtPartName
    TextBox		txtUnitPrice		TextAlign: Right
    TextBox		txtQuantity		TextAlign: Right
    TextBox		txtSubTotal		TextAlign: Right
    Button		btnAdd	Add/Select
    ListView		lvwSelectedParts		FullRowSelect: True GridLines: True View: Details
    Columns		(Name)	Text	TextAlign	Width
    		colSelectedPartNumber	Part #		45
    		colSelectedPartName	Part Name/Description		274
    		colSelectedUnitPrice	Unit Price	Right	58
    		colSelectedQuantity	Qty	Right	28
    		colSelectedSubTotal	Sub-Total	Right	58
    GroupBox		Order Summary
    Button		btnNewAutoPart	New Au&to Part...
    Button		btnUpdateAutoPart	Update Auto Part...
    Label			Selected Parts Total:
    TextBox		txtSelectedPartsTotal	0.00	TextAlign: Right
    Label		Tax Rate:
    TextBox		txtTaxRate	7.75	TextAlign: Right
    Label			%
    Label			Tax Amount:
    TextBox		txtTaxAmount		TextAlign: Right
    Label			Order Total:
    TextBox		txtOrderTotal	0.00	TextAlign: Right
    Button		btnDeleteAutoPart	Delete Auto-Part ...
    Button		btnClose	Close

13. Double-click an unoccupied area of the form to generate its load event
14. Return to the form and, in the Properties window, click the Events button
15. On the form, click the Part Identification tree view
16. In the Events section of the Properties window, double-click NodeMouseClick
17. Return to the form and double-click the New Au&to Part button
18. On the form, click the Available Parts list view to select it and, in the Events section Properties window, double-click ItemSelectionChanged
19. Return to the form and make sure the Available Parts list view is still selected.
    In the Events section of the Properties, double-click DoubleClick
20. Return to the form and click the Part # text box to select it
21. In the Events section of the Properties window, double-click Leave
22. Return to the form and click the Unit Price text box to select it
23. In the Events section of the Properties window, double-click Leave
24. Return to the form and click the Qty text box to select it
25. In the Events section of the Properties window, click the arrow of the Leave combo box and select txtUnitPrice_Leave
26. Return to the form and double-click the Add/Select
27. Return to the form and click the Selected Parts list view to select it
28. In the Events section of the Properties window, double-click DoubleClick
29. Return to the form and double-click the Update Auto-Part button
30. Return to the form and double-click the Delete Auto-Part button
31. Return to the form and double-click the Close button
32. Change the document as follows:

    using System.Xml.Serialization;
    
    namespace CollegeParkAutoParts
    {
        public partial class StoreInvetory : Form
        {
            /* We will need a list of auto-parts.
             * For demonstration purpose, we are creating the list as a property
             * (but a global list is not necessary; we could have used local list variables).*/
            public List<AutoPart> AutoParts { get; set; } = new List<AutoPart>();
    
            public StoreInvetory()
            {
                InitializeComponent();
            }
    
            // This function is used to reset the form
            void InitializeAutoParts()
            {
                // When the form must be reset, removes all nodes from the tree view
                tvwAutoParts.Nodes.Clear();
                // Create the root node of the tree view
                TreeNode nodRoot = tvwAutoParts.Nodes.Add("College Park Auto-Parts",
                                                          "College Park Auto-Parts", 0, 1);
                /* Add the cars years to the tree view.
                 * Our application will deal only with the cars in the last 21 years. */
                for (int years = DateTime.Today.Year + 1; years >= DateTime.Today.Year - 20; years--)
                    nodRoot.Nodes.Add(years.ToString(), years.ToString(), 2, 3);
    
                // Select the root node
                tvwAutoParts.SelectedNode = nodRoot;
                // Expand the root node
                tvwAutoParts.ExpandAll();
    
                // AutoParts = new List<AutoPart>();
    
                // This is the file that holds the list of auto parts
                string strFileName = @"C:\College Park Auto-Parts\AutoParts.xml";
                XmlSerializer xsAutoParts = new(typeof(List<AutoPart>));
    
                if (File.Exists(strFileName))
                {
                    // If the inventory file exists, open it
                    using (FileStream fsAutoParts = new FileStream(strFileName,
                                                                    FileMode.Open,
                                                                    FileAccess.Read,
                                                                    FileShare.Read))
                    {
                        // Retrieve the list of items from file
                        AutoParts = (List<AutoPart>)xsAutoParts.Deserialize(fsAutoParts)!;
    
                        // Show the makes nodes
                        foreach (TreeNode nodYear in nodRoot.Nodes)
                        {
                            List<string> lstMakes = new List<string>();
    
                            foreach (AutoPart part in AutoParts)
                            {
                                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<string> lstModels = new List<string>();
    
                                foreach (AutoPart part in AutoParts)
                                {
                                    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);
                            }
                        }
    
                        // Showing the categories nodes
                        foreach (TreeNode nodYear in nodRoot.Nodes)
                        {
                            foreach (TreeNode nodMake in nodYear.Nodes)
                            {
                                foreach (TreeNode nodModel in nodMake.Nodes)
                                {
                                    List<string> lstCategories = new List<string>();
    
                                    foreach (AutoPart part in AutoParts)
                                    {
    
                                        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);
                                }
                            }
                        }
                    }
                }
    
                lvwSelectedParts.Items.Clear();
                lvwAvailableParts.Items.Clear();
                txtPartName.Text           = string.Empty;
                txtQuantity.Text           = string.Empty;
                txtSubTotal.Text           = string.Empty;
                txtUnitPrice.Text          = string.Empty;
                txtTaxAmount.Text          = string.Empty;
                txtOrderTotal.Text         = string.Empty;
                txtPartNumber.Text         = string.Empty;
                txtSelectedPartsTotal.Text = string.Empty;
                pbxPartImage.Image         = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
            }
    
            private void StoreInvetory_Load(object sender, EventArgs e)
            {
                InitializeAutoParts();
            }
    
            private void tvwAutoParts_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
            {
                TreeNode nodClicked = e.Node;
    
                if (nodClicked.Level == 4)
                    lvwAvailableParts.Items.Clear();
    
                try
                {
                    foreach (AutoPart part in AutoParts)
                    {
                        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"));
                            lvwAvailableParts.Items.Add(lviAutoPart);
                        }
                    }
                }
                catch (NullReferenceException)
                {
                }
            }
    
            private void btnNewAutoPart_Click(object sender, EventArgs e)
            {
                StoreItemNew sin = new StoreItemNew();
    
                sin.ShowDialog();
    
                InitializeAutoParts();
            }
    
            private void lvwAvailableParts_ItemSelectionChanged(object sender, ListViewItemSelectionChangedEventArgs e)
            {
                bool pictureFound = false;
                string strFileName = @"C:\College Park Auto-Parts\AutoParts.xml";
                XmlSerializer xsAutoParts = new XmlSerializer(typeof(List<AutoPart>));
    
                if (File.Exists(strFileName))
                {
                    // If the inventory file exists, open it
                    using (FileStream fsAutoParts = new FileStream(strFileName,
                                                                   FileMode.Open,
                                                                   FileAccess.Read,
                                                                   FileShare.Read))
                    {
                        // Retrieve the list of items from file
                        AutoParts = (List<AutoPart>)xsAutoParts.Deserialize(fsAutoParts)!;
    
                        foreach (AutoPart part in AutoParts)
                        {
                            if( part.PartNumber == long.Parse(e.Item.SubItems[0].Text))
                            {
                                pictureFound       = true;
                                pbxPartImage.Image = Image.FromFile(part.PictureFile!);
                                break;
                            }
                        }
                    }
                }
    
                if(pictureFound == false)
                {
                    pbxPartImage.Image = Image.FromFile(@"C:\College Park Auto-Parts\Generic.png");
                }
                
                Width  = pbxPartImage.Right  + 40;
                Height = pbxPartImage.Bottom + 75;
            }
    
            private void lvwAvailableParts_DoubleClick(object sender, EventArgs e)
            {
                ListViewItem lviAutoPart = lvwAvailableParts.SelectedItems[0];
    
                if ((lvwAvailableParts.SelectedItems.Count == 0) ||
                    (lvwAvailableParts.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;
    
                txtQuantity.Focus();
            }
    
            private void txtUnitPrice_Leave(object sender, EventArgs e)
            {
                double subTotal;
                double unitPrice = 0D;
                double quantity  = 0.00d;
    
                try
                {
                    unitPrice = double.Parse(txtUnitPrice.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("Invalid Unit Price!",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
    
                try
                {
                    quantity = int.Parse(txtQuantity.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("Invalid Quandtity!",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
    
                subTotal         = unitPrice * quantity;
                txtSubTotal.Text = subTotal.ToString("F");
            }
    
            internal void CalculateOrder()
            {
                // Calculate the current total order and update the order
                double partsTotal = 0.00D;
                double taxRate    = 0.00D;
                double taxAmount, orderTotal;
    
                if (string.IsNullOrEmpty(txtTaxRate.Text))
                    txtTaxRate.Text = "7.25";
    
                foreach (ListViewItem lvi in lvwSelectedParts.Items)
                {
                    ListViewItem.ListViewSubItem SubItem = lvi.SubItems[4];
                    partsTotal += double.Parse(SubItem.Text);
                }
    
                try
                {
                    taxRate = double.Parse(txtTaxRate.Text) / 100;
                }
                catch (FormatException)
                {
                    MessageBox.Show("Invalid Tax Rate",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
    
                taxAmount                  = partsTotal * taxRate;
                orderTotal                 = partsTotal + taxAmount;
    
                txtSelectedPartsTotal.Text = partsTotal.ToString("F");
                txtTaxAmount.Text          = taxAmount.ToString("F");
                txtOrderTotal.Text         = orderTotal.ToString("F");
            }
    
            private void txtPartNumber_Leave(object sender, EventArgs e)
            {
                bool found = false;
    
                // After the user had entered a part number,
                // check the whole list of parts
                foreach (AutoPart part in AutoParts)
                {
                    // If you find a part that holds the number the user had entered
                    if (part.PartNumber == long.Parse(txtPartNumber.Text))
                    {
                        // Show the corresponding part name and unit price
                        txtPartName.Text = part.PartName;
                        txtUnitPrice.Text = part.UnitPrice.ToString("F");
                        
                        if(string.IsNullOrEmpty(txtQuantity.Text))
                            txtQuantity.Text = "1";
                        
                        txtSubTotal.Text = part.UnitPrice.ToString("F");
                    
                        // Give focus to the quantity in case the user was to increase it
                        txtQuantity.Focus();
    
                        // And update the flag that specifies that the part has been found
                        found = true;
                        break;
                    }
                    // If the part number was not found, check the next
                } // If no part has that number, the found flag is marked as false
    
                // If no part with that number was found...
                if (found == false)
                {
                    // Since no part with that number was found,
                    // reset the text boxes
                    txtPartName.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.",
                                "College Park Auto-Parts",
                                MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
    
            private void btnAdd_Click(object sender, EventArgs e)
            {
                if(string.IsNullOrEmpty(txtPartNumber.Text) )
                {
                    MessageBox.Show("There is no part to be added to the order.",
                                    "College Park Auto-Parts",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
    
                foreach (AutoPart part in AutoParts)
                {
                    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();
            }
    
            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();
            }
    
            private void btnUpdateAutoPart_Click(object sender, EventArgs e)
            {
                StoreItemEditor sie = new StoreItemEditor();
    
                sie.ShowDialog();
    
                InitializeAutoParts();
            }
    
            private void btnDeleteAutoPart_Click(object sender, EventArgs e)
            {
                StoreItemDelete sid = new StoreItemDelete();
    
                sid.ShowDialog();
    
                InitializeAutoParts();
            }
    
            private void btnClose_Click(object sender, EventArgs e)
            {
                Close();
            }
        }
    }

Executing and Testing the Application

After creating and application, you can execute it. You can then test it with sample values.

Practical Learning: Executing and Testing the Application

1. To execute the application, on the main menu, click Debug -> Start Without Debugging:

   

2. Click the New Auto Part button

   

3. Click the New Make button
4. Click Cancel
5. Create some auto parts as follows:

   393795	2015	Buick	Regal	Alternators & Generators	DB Electrical Alternator	218.74	928037
   928374	2018	Chevrolet	Express 3500	Shocks, Struts & Suspension	Suspension Kit (Front; with 3 Groove Pitman Arm)	142.44	304031
   730283	2020	Jeep	Wrangler Unlimited Sahara	Oil Filters	Hydraulic Cylinder Timing Belt Tensioner	14.15	730283
   290741	2015	Ford	F-150 XL 3.5L V6 Flex Regular Cab 2 Full-Size Doors	Shocks, Struts & Suspension	Front Strut and Coil Spring Assembly - Set of 2	245.68	290741
   740248	2013	Chevrolet	Equinox	Bearings & Seals	Wheel hub bearing Assembly	99.95	740248
   283759	2012	Dodge	Charger 3.6L	Starters	DB Electrical SND0787 Starter	212.58	283759
   799428	2012	Cadillac	XTS	Bearings & Seals	Front/Rear Wheel Hub Bearing Assembly 5 Lugs w/ABS	79.97	799428
   648203	2018	Honda	CRV	Alternators	Alternator	202.47	593804
   502853	2014	GMC	Terrain	Bearings & Seals	Wheel Hub Bearing Assembly	48.85	927944
   520384	2020	Jeep	Wrangler Unlimited Sahara	Drum Brake	Rear Dynamic Friction Company True-Arc Brake Shoes	42.22	520384
   727394	2018	Toyota	Corolla SE 1.8L L4 Gas	Alternators	DB Electrical 400-40169 Alternator Compatible With/Replacement For 125 Internal Fan Type Decoupler Pulley Type Internal Regulator CW Rotation	215.84	727394
   927944	2017	Chevrolet	Equinox	Bearings & Seals	Wheel Hub Bearing Assembly	48.85	927944
   749471	2019	Toyota	Prius	Shocks, Struts & Suspension	2-Piece Suspension Strut and Coil Spring Kit (593024)	299.97	593024
   927307	2014	Buick	Regal	Alternators & Generators	DB Electrical Alternator	218.74	928037
   304031	2017	Chevrolet	Express 2500	Shocks, Struts & Suspension	Suspension Kit (Front; with 3 Groove Pitman Arm)	142.44	304031
   497249	2013	GMC	Sierra 1500	Drum Brake	ACDelco Gold 17960BF1 Bonded Rear Drum Brake Shoe Set	58.92	497249
   973947	2012	Honda	Accord	Brake Kits	R1 Concepts Front Rear Brakes and Rotors Kit |Front Rear Brake Pads| Brake Rotors and Pads| Ceramic Brake Pads and Rotors	292.84	973947
   182694	2016	Chevrolet	Impala	Bearings & Seals	Wheel Hub Bearing Assembly	48.85	927944
   497249	2013	Chevrolet	Silverado 1500	Drum Brake	ACDelco Gold 17960BF1 Bonded Rear Drum Brake Shoe Set	58.92	497249
   297149	2020	Jeep	Wrangler	Air Filters	ACDelco Gold A3408C Air Filter	22.83	297149
   927397	2016	Chevrolet	Impala	Bearings & Seals	Front/Rear Wheel Hub Bearing Assembly 5 Lugs w/ABS	79.97	799428
   392972	2020	Toyota	Prius AWD-e	Shocks, Struts & Suspension	2-Piece Suspension Strut and Coil Spring Kit (593024)	299.97	593024
   928037	2017	Buick	Regal	Alternators & Generators	DB Electrical Alternator	218.74	928037
   502481	2016	Chevrolet	Equinox	Bearings & Seals	Wheel hub bearing Assembly	99.95	740248
   593804	2019	Honda	Accord LX 1.5L L4 Gas	Alternator	Alternator	202.47	593804
   293748	2014	Toyota	Corolla SE 1.8L L4 Gas	Alternators	DB Electrical 400-40169 Alternator Compatible With/Replacement For 125 Internal Fan Type Decoupler Pulley Type Internal Regulator CW Rotation	215.84	727394
   639704	2021	Kia	Sorento	Brake Kits	Rear Brakes and Rotors Kit |Rear Brake Pads| Brake Rotors and Pads| Optimum OEp Brake Pads and Rotors	125.15	639704
   829385	2020	Jeep	Wrangler Unlimited Sahara	Drum Brake	Centric Brake Shoe	22.05	829385
   484695	2014	GMC	Terrain	Bearings & Seals	Front/Rear Wheel Hub Bearing Assembly 5 Lugs w/ABS	79.97	799428
   807204	2016	Chevrolet	Camaro	Alternators & Generators	DB Electrical Alternator	218.74	928037
   939283	2015	Chevrolet	Equinox	Bearings & Seals	Wheel Hub Bearing Assembly	48.85	927944
   738628	2021	Toyota	Prius AWD-e	Shocks, Struts & Suspension	2-Piece Suspension Strut and Coil Spring Kit (593024)	299.97	593024
   186950	2017	Honda	CRV	Alternator	Alternator	202.47	593804
   329573	2012	Chevrolet	Equinox	Bearings & Seals	Front/Rear Wheel Hub Bearing Assembly 5 Lugs w/ABS	79.97	799428
   594085	2015	Buick	Regal	Bearings & Seals	Front/Rear Wheel Hub Bearing Assembly 5 Lugs w/ABS	79.97	799428
   928405	2018	Chevrolet	Camaro	Alternators & Generators	DB Electrical Alternator	218.74	928037
   927937	2012	Ford	Focus SE	Starters	Duralast Starter 19481	188.88	927937
   283948	2018	GMC	Savana 3500	Shocks, Struts & Suspension	Suspension Kit (Front; with 3 Groove Pitman Arm)	142.44	304031
   495116	2020	Chrysler	Voyager	Brake Kits	Power Stop K7845 Rear Z23 Carbon Fiber Brake Pads with Drilled & Slotted Brake Rotors Kit	269.75	293748
   180400	2012	Cadillac	CTS FWD	Bearings & Seals	Front/Rear Wheel Hub Bearing Assembly 5 Lugs w/ABS	79.97	799428
   593024	2021	Toyota	Prius	Shocks, Struts & Suspension	2-Piece Suspension Strut and Coil Spring Kit (593024)	299.97	593024
   302839	2014	Chevrolet	Equinox	Bearings & Seals	Wheel Hub Bearing Assembly	48.85	927944
   649394	2020	Jeep	Wrangler Unlimited Sahara	Brake Kits	Power Stop K7940 Front Z23 Evolution Sport Brake Upgrade Kit	354.46	495116
   820684	2015	Buick	LaCrosse	Bearings & Seals	Front/Rear Wheel Hub Bearing Assembly 5 Lugs w/ABS	79.97	799428
   602839	2017	GMC	Savana 2500	Shocks, Struts & Suspension	Suspension Kit (Front; with 3 Groove Pitman Arm)	142.44	304031

6. Close the forms and return to your programming environment
7. Close your programming environment

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