🥔 Buttons, TextBoxes, and Controls in C# 🥔

---

🎯 What are Controls in C#?

Imagine you’re building a potato vending machine 🥔🤖. You need:

• 📝 TextBoxes – So customers can type their names and choose their potatoes.
• 🖱️ Buttons – To let them place an order.
• 📢 Labels – To show messages like “Thank you for buying potatoes!”

These items that users interact with in a Windows Form are called Controls in C#. 🎁✨

A control is any item on your form that helps users interact with your application. There are many types of controls in C#, but today we’ll focus on:

• 🖱️ Buttons
• 📝 TextBoxes
• 📢 Labels

---

🥔 Why Use Controls?

Controls help make your application: ✅ User-friendly
✅ Interactive
✅ Easy to understand

Without controls, users would need to type everything manually in the console. But with controls, they can just click, type, and view! 🥳

---

🎨 Overview of Basic Controls

🖥️ Control	📝 Purpose	🎁 Example
🖱️ Button	Perform an action	Submit an order
📝 TextBox	Input text	Enter name or details
📢 Label	Display text or messages	Show order confirmation
🎨 ComboBox	Choose from a dropdown list	Select potato type
📚 ListBox	Display multiple options	List available potato types

---

🖱️ Button Control in C#

A Button is like the “Order Now” button on your potato vending machine.
When a customer clicks it, something happens! 🎉

---

🎁 Step 1: Add a Button to Your Form

• Drag a Button from the toolbox onto the form.
• Change the Text property to Order Now.
• Set the Name property to btnOrder.

---

🎁 Step 2: Add Click Event to the Button

When the button is clicked, we want to show a Thank You message.

private void btnOrder_Click(object sender, EventArgs e)
{
    MessageBox.Show("🥔 Thank you for ordering potatoes!");
}

✅ Explanation:

• btnOrder_Click – This method is triggered when the button is clicked.
• MessageBox.Show() – Displays a message.

---

🧑‍💻 Complete Button Example:

using System;
using System.Windows.Forms;

namespace PotatoFormApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnOrder_Click(object sender, EventArgs e)
        {
            MessageBox.Show("🥔 Thank you for ordering potatoes!");
        }
    }
}

---

📝 TextBox Control in C#

A TextBox is like a “Customer Name” field where customers type their names before ordering.

---

🎁 Step 1: Add a TextBox to Your Form

• Drag a TextBox from the toolbox onto the form.
• Change the Name property to txtName.
• Add a Label with the text Enter Your Name: to guide the user.

---

🎁 Step 2: Get Text from a TextBox

To get the value from a TextBox, use the Text property:

string customerName = txtName.Text;

✅ Explanation:

• txtName.Text – Gets the text the user entered in the TextBox.

---

🧑‍💻 Complete TextBox Example:

private void btnOrder_Click(object sender, EventArgs e)
{
    string customerName = txtName.Text;

    if (string.IsNullOrEmpty(customerName))
    {
        MessageBox.Show("❌ Please enter your name.");
    }
    else
    {
        MessageBox.Show($"🥔 Hello {customerName}, your potatoes are on the way!");
    }
}

---

📢 Label Control in C#

A Label is like a signboard that shows messages to customers at your potato vending machine.
You can use it to display information or guide the user.

---

🎁 Step 1: Add a Label to Your Form

• Drag a Label from the toolbox onto the form.
• Change the Text property to Enter Your Name:.

---

🎁 Step 2: Set or Update Label Text

To change the label text in code, use the Text property:

lblMessage.Text = "🥔 Order received! Preparing your potatoes...";

✅ Explanation:

• lblMessage.Text – Updates the label’s text dynamically.

---

🧑‍💻 Complete Label Example:

private void btnOrder_Click(object sender, EventArgs e)
{
    string customerName = txtName.Text;

    if (string.IsNullOrEmpty(customerName))
    {
        lblMessage.Text = "❌ Please enter your name.";
    }
    else
    {
        lblMessage.Text = $"🥔 Hello {customerName}, your potatoes are being prepared!";
    }
}

---

🎯 Putting It All Together – Create a Potato Order Form

---

🎁 Form Design:

• TextBox: txtName – To enter customer’s name.
• Button: btnOrder – To place the order.
• Label: lblMessage – To display confirmation.

---

🧑‍💻 Complete Code for Potato Order Form:

using System;
using System.Windows.Forms;

namespace PotatoFormApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnOrder_Click(object sender, EventArgs e)
        {
            // Get the customer name from the TextBox
            string customerName = txtName.Text;

            // Check if the name is empty
            if (string.IsNullOrEmpty(customerName))
            {
                lblMessage.Text = "❌ Please enter your name.";
            }
            else
            {
                // Update label to confirm order
                lblMessage.Text = $"🥔 Hello {customerName}, your potato order is being processed!";
            }
        }
    }
}

---

🥔 Adding Multiple Controls

You can add more controls to improve the form:

• 📝 TextBox: For potato type.
• 🔢 NumericUpDown: For quantity.
• 🎁 ComboBox: For additional options.
• 📚 ListBox: To list available potato types.

---

🎉 Challenge Time!

📝 Task:

1. Create a form with:
   • 📝 A TextBox to enter the customer’s name.
   • 🖱️ A Button to submit the order.
   • 📢 A Label to display a thank-you message.
2. Add another button that clears the TextBox and resets the form.

---

🎁 Bonus: Form Reset Button Code

private void btnReset_Click(object sender, EventArgs e)
{
    txtName.Text = "";         // Clear the TextBox
    lblMessage.Text = "";      // Clear the Label
    txtName.Focus();           // Set focus back to TextBox
}

✅ Explanation:

• txtName.Text = "" – Clears the TextBox.
• lblMessage.Text = "" – Clears the Label.
• txtName.Focus() – Puts the cursor back in the TextBox.

---

🥔 Summary of Controls in C#

🎨 Control	📝 Purpose
🖱️ Button	Perform an action when clicked
📝 TextBox	Get input from the user
📢 Label	Show messages or instructions
📚 ListBox	Display multiple selectable items
🎨 ComboBox	Allow user to select an option