How to get or display data from database

Hi all,
I want to display the data from database in textbox2 and textbox3 when user type word in textbox1 and click button search. Below is my c# code and what should i do to get the data??
namespace KIO.BM
{
    public partial class Kamus : System.Web.UI.Page
    {
        private void GetData(string translateWord)
        {

            SqlConnection conn = new SqlConnection("kamusConnectionString");
            DataTable dt = new DataTable();
            try
            {
                conn.Open();

 &nb ...