Associate checkbox with datagrid viewer value

I made some checkboxes outside of the datagrid viewer and I'm trying to associate a value of checked = true with the display of that information from the database. The database string variables have the same name as the checkbox names without the cbox at the end (i.e, X_Off_box associates with string X_Off) I've listed some of the code I have below. I used an array of the checkboxes to filter out all the true values. The button click is the function to display them.

    public void CheckBoxLoop()
    {
        System.Windows.Forms.CheckBox[] boxes = new System.Windows.Forms.CheckBox[2];

        boxes[0] = X_off_cbox;
        boxes[1] = Y_off_cbox;
        boxes[2] = Z_off_cbox;

     for(int i=0; i<=2; i++)
        {
            if (boxes[i].Checked==true){

            //return a variable for checkbox to associate with database?
            }
        }
    }

    private void show_btn_Click(object sender, EventArgs e)
    {
        //string constring = "";
        SqlConnection con = new SqlConnection();
        con.ConnectionString= @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\Sample\Desktop\My Project\My Application\My_QA_App\My_QA_App\New_Data.mdf;Integrated Security=True;User Instance=True";

        try
        {
            con.Open();
            SqlDataAdapter sda = new SqlDataAdapter("select * from My_QA_Data", con);
            System.Data.DataTable dt = new System.Data.DataTable();
            sda.Fill(dt);
            My_QA_DataDataGridView.DataSource = dt;
        }