Writing Data to CSV File using C#

Step 1: Create New Project

Step 2: Add “System.IO” namespace.

Step 3: Create the form as follows.

Step 4: Write the following code.

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;

using System.IO;

namespace WritingCSV

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void buttonAdd_Click(object sender, EventArgs e)

        {

            string FirstName = textBoxFirstName.Text;

            string LastName = textBoxLastName.Text;

            string Age = textBoxAge.Text;

            listBoxFirstName.Items.Add(FirstName);

            listBoxLastName.Items.Add(LastName);

            listBoxAge.Items.Add(Age);

            textBoxFirstName.ResetText();

            textBoxLastName.ResetText();

            textBoxAge.ResetText();

        }

        private void buttonWrite_Click(object sender, EventArgs e)

        {

            string FilePath = textBoxFilePath.Text;

            string[] FirstNames = new string[listBoxFirstName.Items.Count];

            string[] LastNames = new string[listBoxFirstName.Items.Count];

            string[] Ages = new string[listBoxFirstName.Items.Count];

            string[] TotalData = new string[listBoxFirstName.Items.Count];

            for (int i = 0; i < listBoxFirstName.Items.Count; i++)

            {

                FirstNames[i] = listBoxFirstName.Items[i].ToString();

                LastNames[i] = listBoxLastName.Items[i].ToString();

                Ages[i] = listBoxAge.Items[i].ToString();

                TotalData[i] = FirstNames[i] + "," + LastNames[i] + "," + Ages[i];

            }

            File.WriteAllLines(FilePath, TotalData);

            MessageBox.Show("CSV File Created Successfully", "Success");

        }

    }

}

Step 5: Output