This document is a C# lab manual focused on creating a Windows Forms application that involves quiz functionality. It includes code snippets for managing timers, user interface controls like list boxes and combo boxes, and handling user interactions for quiz selection and score calculation. The goal is to enable students to learn practical programming with C# through hands-on lab exercises.

1. PROGRAMMING USING C#
LAB MANUAL
SARASWATHI RAMALINGAM
SRI AKILANDESWARI WOMENS COLLEGE
THIRUVALLUVAR UNIVERSITY

2. Windows Form Controls (List,
Combo, Timer, Group Box,
Picture Box)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace controls {

3. public partial class Form1 : Form { private int i;
public Form1()
{ InitializeComponent(); }
private void time1()
{
Timer timer1 = new Timer();
timer1.Interval = 1000;
timer1.Enabled = true;
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Start();
i = 30;
}
private void listBox1_SelectedIndexChanged(object sender,
EventArgs e)

4. {
if (listBox1.SelectedItem == "Computer Quiz")
{
groupBox2.Enabled = false;
}
else
{
groupBox2.Enabled = true;
listBox1.Enabled = false;
time1();
}
if (listBox1.SelectedItem == "Maths Quiz")
{
groupBox1.Enabled = false;
}
else
{
groupBox1.Enabled = true;
listBox1.Enabled = false;
time1();
} }

5. private void button1_Click(object sender, EventArgs e)
{
listBox1.Enabled = true;
if (groupBox1.Enabled == false || groupBox2.Enabled == false)
{
MessageBox.Show("Please Select Quiz Mode");
} }
private void timer1_Tick(object sender, EventArgs e)
{
int result = 0;
if (comboBox1.SelectedItem == "Undo")
{
result = result + 5;
}
if (comboBox2.SelectedItem == "Redo")
{
result = result + 5;
}
if (comboBox3.SelectedItem == "Print Preview")
{
result = result + 5;
}
if (comboBox4.SelectedItem == "Close a Worksheet")
{
result = result + 5;
}
if (comboBox5.SelectedItem == "Insert a Worksheet")
{
result = result + 5;
}

6. if (comboBox6.SelectedItem == "62")
{
result = result + 5;
}
if (comboBox7.SelectedItem == "11")
{
result = result + 5;
}
if (comboBox8.SelectedItem == "25")
{
result = result + 5;
}
if (comboBox9.SelectedItem == "108")
{
result = result + 5;
}
if (comboBox10.SelectedItem == "1")
{
result = result + 5;
}
if (i >= 0) { i = i - 1; textBox1.Text = i + " Seconds";
}
if (textBox1.Text == 0 + " Seconds")
{
MessageBox.Show("Time Out Your score=" + result);
this.Close();
} }
private void Form1_Load(object sender, EventArgs e)
{
groupBox1.Enabled = false;
groupBox2.Enabled = false;
listBox1.Enabled = false;
} } }