C# How to export listview to pdf

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

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

this.listView1.ColumnWidthChanging += new ColumnWidthChangingEventHandler(listView1_ColumnWidthChanging);
}

void listView1_ColumnWidthChanging(object sender, ColumnWidthChangingEventArgs e)
{
Console.Write("Column Resizing");
e.NewWidth = this.listView1.Columns[e.ColumnIndex].Width;
e.Cancel = true;
}

private void button1_Click(object sender, EventArgs e)
{
double kreditmeblegi;
double illikfaiz;
double fm;
double value1;
double ay;
double il;
double ayliqodenis;
double umumiodenis;
double esasborc;
double faiz;
double qaliqmebleg;

if (string.IsNullOrEmpty(textBox1.Text) || string.IsNullOrEmpty(textBox2.Text) || string.IsNullOrEmpty(textBox3.Text))
{
MessageBox.Show("R?q?ml?ri daxil edin.");
}

else
{
if (comboBox2.Text == "ay")
{
kreditmeblegi = Convert.ToDouble(textBox1.Text);
illikfaiz = Convert.ToDouble(textBox2.Text);
ay = Convert.ToDouble(textBox3.Text);

fm = illikfaiz / (12 * 100);

value1 = 1 - (1 / Math.Pow((1 + fm), ay));

ayliqodenis = (kreditmeblegi * fm) / value1;
umumiodenis = ayliqodenis * ay;

label9.Text = ayliqodenis.ToString("N2") + " " + comboBox1.Text;
label10.Text = umumiodenis.ToString("N2") + " " + comboBox1.Text;

DateTime date = this.dateTimePicker1.Value.Date;
DateTime nyear = new DateTime();
string format = "dd / MM / yyyy";
qaliqmebleg = kreditmeblegi;
for (int i = 1; i <= ay; i++)
{
nyear = date.AddMonths(i);
ListViewItem lvi = new ListViewItem(nyear.ToString(format));
lvi.SubItems.Add(ayliqodenis.ToString("N2"));

faiz = qaliqmebleg * fm;
esasborc = ayliqodenis - faiz;
qaliqmebleg = qaliqmebleg - esasborc;

lvi.SubItems.Add(esasborc.ToString("N2"));
lvi.SubItems.Add(faiz.ToString("N2"));
lvi.SubItems.Add(qaliqmebleg.ToString("N2"));

listView1.Items.Add(lvi);
}

button1.Enabled = false;

if (Convert.ToDouble(textBox1.Text) == 0 || Convert.ToDouble(textBox2.Text) == 0 || Convert.ToDouble(textBox3.Text) == 0)
{
MessageBox.Show("Sifir daxil etm?k olmaz!");
button1.Enabled = true;
}
}

else
{
kreditmeblegi = Convert.ToDouble(textBox1.Text);
illikfaiz = Convert.ToDouble(textBox2.Text);
il = Convert.ToDouble(textBox3.Text) * 12;

fm = illikfaiz / (12 * 100);

value1 = 1 - (1 / Math.Pow((1 + fm), il));

ayliqodenis = (kreditmeblegi * fm) / value1;
umumiodenis = ayliqodenis * il;

DateTime date = this.dateTimePicker1.Value.Date;
DateTime nyear = new DateTime();
string format = "dd / MM / yyyy";
qaliqmebleg = kreditmeblegi;
for (int j = 1; j <= il; j++)
{
nyear = date.AddMonths(j);
ListViewItem lvi = new ListViewItem(nyear.ToString(format));
lvi.SubItems.Add(ayliqodenis.ToString("N2"));

faiz = qaliqmebleg * fm;
esasborc = ayliqodenis - faiz;
qaliqmebleg = qaliqmebleg - esasborc;

lvi.SubItems.Add(esasborc.ToString("N2"));
lvi.SubItems.Add(faiz.ToString("N2"));
lvi.SubItems.Add(qaliqmebleg.ToString("N2"));

listView1.Items.Add(lvi);
}

label9.Text = ayliqodenis.ToString("N2") + " " + comboBox1.Text;
label10.Text = umumiodenis.ToString("N2") + " " + comboBox1.Text;
button1.Enabled = false;

if (Convert.ToDouble(textBox1.Text) == 0 || Convert.ToDouble(textBox2.Text) == 0 || Convert.ToDouble(textBox3.Text) == 0)
{
MessageBox.Show("Sifir daxil etm?k olmaz!");
button1.Enabled = true;
}
}
}

}

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar) &&
(e.KeyChar != '.'))
{
e.Handled = true;
}

// only allow one decimal point
if ((e.KeyChar == '.') && ((sender as TextBox).Text.IndexOf('.') > -1))
{
e.Handled = true;
}
}

private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
{
if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar) &&
(e.KeyChar != '.'))
{
e.Handled = true;
}

// only allow one decimal point
if ((e.KeyChar == '.') && ((sender as TextBox).Text.IndexOf('.') > -1))
{
e.Handled = true;
}
}

private void textBox3_KeyPress(object sender, KeyPressEventArgs e)
{
if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar) &&
(e.KeyChar != '.'))
{
e.Handled = true;
}

// only allow one decimal point
if ((e.KeyChar == '.') && ((sender as TextBox).Text.IndexOf('.') > -1))
{
e.Handled = true;
}
}

private void haqqindaToolStripMenuItem_Click(object sender, EventArgs e)
{
About about = new About();
about.Show();
}

private void wiewHelpToolStripMenuItem_Click(object sender, EventArgs e)
{
Help melumat = new Help();
melumat.Show();
}

private void t?mizl?ToolStripMenuItem_Click(object sender, EventArgs e)
{
textBox1.Clear();
textBox2.Clear();
textBox3.Clear();
comboBox1.Text = "AZN";
comboBox2.Text = "ay";
dateTimePicker1.Value = DateTime.Now;
label9.Text = "0";
label10.Text = "0";
listView1.Items.Clear();
button1.Enabled = true;
}

private void çixToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();
}

private void comboBox1_KeyPress(object sender, KeyPressEventArgs e)
{
e.Handled = true;
}

private void comboBox2_KeyPress(object sender, KeyPressEventArgs e)
{
e.Handled = true;
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void pDF?ÇixartToolStripMenuItem_Click(object sender, EventArgs e)
{
FileStream fs = new FileStream("Kreditin Hesablanmasi.pdf", FileMode.Create, FileAccess.Write, FileShare.None);
Document doc = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(doc, fs);
doc.Open();
doc.Add(new Paragraph("Kredit Kalkulyatoru"));
doc.Add(new Paragraph("This is a page 2"));
doc.Close();
}
}
}