CheckBox column checked boxes shows TRUE in generated CSV file

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Configuration;
using System.IO;
using System;




namespace KM_Artefact
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();

            checkBoxColumn.HeaderText = "";

            checkBoxColumn.Width = 60;

            checkBoxColumn.Name = "checkBoxColumn";
            dataGridView1.Columns.Insert(0, checkBoxColumn);

        }


        private void button1_Click(object sender, EventArgs e)
        {
            try
            {

                String str = "Server=" + IPfield.Text + ";" + "database=" + DBfield.Text + ";" + "UID=" + IDfield.Text + ";" + "password=" + pwdfield.Text;
                /*String tbl = "Table=" + textBox6.Text;*/
                //System.Console.WriteLine(str);
                Boolean flag = false;


                if (DBfield.Text == "")
                {
                    MessageBox.Show("Enter database name");
                    flag = true;
                }
                else if (Queryfield.Text == "")
                {
                    MessageBox.Show("Enter SQL Query");
                    flag = true;
                }
                else if (IPfield.Text == "")
                {
                    MessageBox.Show("Enter SQL IP");
                    flag = true;
                }
                else if (IDfield.Text == "")
                {
                    MessageBox.Show("Enter Username");
                    flag = true;
                }
                else if (pwdfield.Text == "")
                {
                    MessageBox.Show("Enter Password");
                    flag = true;
                }


                if (flag == false)
                {

                    SqlConnection con = new SqlConnection(str);

                    String query = Queryfield.Text;
                    SqlCommand cmd = new SqlCommand(query, con);
                    SqlDataAdapter dataadapter = new SqlDataAdapter(query, con);
                    DataSet ds = new DataSet();
                    con.Open();
                    /*dataadapter.Fill(ds, "VMS");*/
                    dataadapter.Fill(ds, query);

                    //MessageBox.Show("connect with SQL server");
                    //MessageBox.Show("Connected");

                    DataTable dt = ds.Tables[query];


                    SaveFileDialog saveFileDialog1 = new SaveFileDialog();
                    saveFileDialog1.Filter = "CSV|*.csv";
                    saveFileDialog1.Title = "Save a CSV File";
                    //saveFileDialog1.ShowDialog();
                    DialogResult dr = saveFileDialog1.ShowDialog();

                    if (dr == DialogResult.OK)
                    {
                        string strFilePath = saveFileDialog1.FileName;
                        //save file using stream.
                        //StreamWriter sw = new StreamWriter(strFilePath, true);
                        CreateCSVFile(dt, strFilePath);
                    }

                    //CreateCSVFile(dt, "");


                    //MessageBox.Show("CSV generated");


                    con.Close();
                   // DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();

                   // checkBoxColumn.HeaderText = "SELECT";

                   // checkBoxColumn.Width = 60;

                    //checkBoxColumn.Name = "checkBoxColumn";
                    //dataGridView1.Columns["checkBoxColumn"].ReadOnly = false;
                    //checkBoxColumn.Selected = true;
                    //dataGridView1.Columns.Insert(0, checkBoxColumn);
                    dataGridView1.DataSource = ds;
                    dataGridView1.DataMember = query;




                }
            }

            catch (Exception es)
            {

                MessageBox.Show(es.Message);
                //MessageBox.Show("Unable to Connect \nPlease Enter Correct Credentials");




            }

        }
        public void CreateCSVFile(DataTable dt, string strFilePath)
        {

            #region Export Grid to CSV

            // Create the CSV file to which grid data will be exported.
            StreamWriter sw = new StreamWriter(strFilePath, false);
            // First we will write the headers.
            //DataTable dt = m_dsProducts.Tables[0];
            int iColCount = dt.Columns.Count;
            for (int i = 0; i < iColCount; i++)
            {
                sw.Write(dt.Columns[i]);
                if (i < iColCount - 1)
                {
                    sw.Write(",");
                }
            }
            sw.Write(sw.NewLine);
            // Now write all the rows.
            foreach (DataRow dr in dt.Rows)
            {
                for (int i = 0; i < iColCount; i++)
                {
                    if (!Convert.IsDBNull(dr[i]))
                    {
                        sw.Write(dr[i].ToString());
                    }
                    if (i < iColCount - 1)
                    {
                        sw.Write(",");
                    }
                }
                sw.Write(sw.NewLine);
            }
            sw.Close();

            #endregion
        }
       
        private void button2_Click(object sender, EventArgs e)
        {
            try
            {

                String str = "Server=" + IPfield.Text + ";" + "database=" + DBfield.Text + ";" + "UID=" + IDfield.Text + ";" + "password=" + pwdfield.Text;
                /*String tbl = "Table=" + textBox6.Text;*/
                //System.Console.WriteLine(str);
                Boolean flag = false;


                if (DBfield.Text == "")
                {
                    MessageBox.Show("Enter database name");
                    flag = true;
                }
                else if (Queryfield.Text == "")
                {
                    MessageBox.Show("Enter SQL Query");
                    flag = true;
                }
                else if (IPfield.Text == "")
                {
                    MessageBox.Show("Enter SQL IP");
                    flag = true;
                }
                else if (IDfield.Text == "")
                {
                    MessageBox.Show("Enter Username");
                    flag = true;
                }
                else if (pwdfield.Text == "")
                {
                    MessageBox.Show("Enter Password");
                    flag = true;
                }


                if (flag == false)
                {

                    SqlConnection con = new SqlConnection(str);

                    String query = Queryfield.Text;
                    SqlCommand cmd = new SqlCommand(query, con);
                    SqlDataAdapter dataadapter = new SqlDataAdapter(query, con);
                    DataSet ds = new DataSet();
                    con.Open();
                    /*dataadapter.Fill(ds, "VMS");*/
                    dataadapter.Fill(ds, query);

                    MessageBox.Show("connect with SQL server");
                    //MessageBox.Show("Connected");

                    DataTable dt = ds.Tables[query];
                    con.Close();
                   /* DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();

                    checkBoxColumn.HeaderText = "SELECT";

                    checkBoxColumn.Width = 60;

                    checkBoxColumn.Name = "checkBoxColumn";
                    dataGridView1.Columns.Insert(0, checkBoxColumn);*/
                   // dataGridView1.Columns["checkBoxColumn"].ReadOnly = false;
                    //checkBoxColumn.Selected = true;
                    dataGridView1.DataSource = ds;
                    dataGridView1.DataMember = query;
                    


                }
            }
                 catch (Exception es)
            {

                MessageBox.Show(es.Message);
                //MessageBox.Show("Unable to Connect \nPlease Enter Correct Credentials");




            }
 
                       
        }

        private void GetCellData(string path)
        {
            string data = "";
            //string userDesktop = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
            TextWriter tw = new StreamWriter(path,false);

            // Count each row in the datagrid
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                
                if (dataGridView1.Rows[i].Cells["checkBoxColumn"].Value != null &&
                    (bool)dataGridView1.Rows[i].Cells["checkBoxColumn"].Value)
              
                {
                    
                    foreach (DataGridViewCell cell in dataGridView1.Rows[i].Cells)
                    for(int j=0; j < dataGridView1.Columns.Count; j++ )
                    {
                        

                       
                            data = data + (cell.Value + ",");
                     
                    }
                    data = data + "\n";
                }
                else
                {
                    continue;
                }

            }
            tw.WriteLine(data, "data");
            tw.Close();
        }

        private void button3_Click(object sender, EventArgs e)
        {


            //for (int i = 0; i < dataGridView1.Rows.Count;i++ )
           
                int i=0;
                if (dataGridView1.Rows[i].Cells["checkBoxColumn"].Value != null &&
                    (bool)dataGridView1.Rows[i].Cells["checkBoxColumn"].Value)
                {
                    //dataGridView1.Columns[0].Visible = false;
                    SaveFileDialog saveFileDialog1 = new SaveFileDialog();
                    saveFileDialog1.Filter = "CSV|*.csv";
                    saveFileDialog1.Title = "Save a CSV File";
                    //saveFileDialog1.ShowDialog();
                    DialogResult dr = saveFileDialog1.ShowDialog();

                    if (dr == DialogResult.OK)
                    {
                        string Path = saveFileDialog1.FileName;
                        //save file using stream.
                        //StreamWriter sw = new StreamWriter(strFilePath, true);
                        GetCellData(Path);
                    }
                }

                else
                {
                    //continue;
                    MessageBox.Show("Select data");

                }
            
            
            }
           
        }
        
           
                  

        }