Bakery Shop — Order Form Calculator

Screenshots

Code-Behind

Event handlers and calculation logic that respond to button clicks and input changes.

Form Designer

Designer-generated layout code defining labels, text boxes, buttons, and group boxes.

Completed Order Example

An example test run showing the form filled out with sample items and a calculated total.

Project Overview

This assignment focused on building a basic point-of-sale style order form in C# Windows Forms. The user selects one or more bakery items, and the application calculates the subtotal based on quantity and price. A sales tax rate is applied, and an optional discount can be toggled on or off. The final total is then displayed for the customer.

In addition to the calculation logic, the form includes a clear/reset function. This makes it easy to reuse the same form for multiple customers without closing and reopening the application.

Key Logic (Subtotal, Tax & Discount)

A simplified example of how the cost calculation is handled:

private void btnCalculate_Click(object sender, EventArgs e)
{
    decimal subtotal = 0m;

    // Example of item checks (actual project uses specific controls and prices)
    if (chkDonut.Checked)
        subtotal += DONUT_PRICE * nudDonutQuantity.Value;

    if (chkCookie.Checked)
        subtotal += COOKIE_PRICE * nudCookieQuantity.Value;

    decimal tax = subtotal * TAX_RATE;

    decimal discount = 0m;
    if (chkDiscount.Checked)
        discount = subtotal * DISCOUNT_RATE;

    decimal total = subtotal + tax - discount;

    txtSubtotal.Text = subtotal.ToString("C");
    txtTax.Text      = tax.ToString("C");
    txtDiscount.Text = discount.ToString("C");
    txtTotal.Text    = total.ToString("C");
}

The real code uses the specific controls created for the project, but this snippet shows the core idea: gather selected items, calculate subtotal, apply tax and optional discount, then format the results as currency for display.

What I Learned

• How to build a basic order-entry workflow using C# Windows Forms.
• How to handle button click events and update the UI in response to user input.
• How to perform subtotal, tax, and discount calculations in a clear, maintainable way.
• How to format numeric output as currency and reset a form for the next transaction.

Explore the Code

You can review the full implementation, including all controls, events, and calculation logic, in the GitHub repository.