Hi!! How I can solve thise problem?

public partial class Form1 : Form
    {
        SqlConnection con = myConnection.GetConnection();
        DataTable dt = new DataTable();
        public Form1()
        {
            InitializeComponent();
            GetData();
        }
        public void GetData()
        {
            SqlCommand cmd = new SqlCommand("SELECT SURNAME,NAM,LASTNAME,BIRTHDAY,ADDRESS FROM INFO", con);
            SqlDataAdapter sda = new SqlDataAdapter(cmd);
            con.Open();
            sda.Fill(dt);
            dataGridView1.AutoGenerateColumns = false;
            dataGridView1.Columns[0].Name = "SURNAME";
            dataGridView1.Columns[0].HeaderText = "    SURNAME";
            dataGridView1.Columns[0].DataPropertyName = "SURNAME";
            dataGridView1.Columns[1].Name = "NAM";
            dataGridView1.Columns[1].HeaderText = "        NAME";
            dataGridView1.Columns[1].DataPropertyName = "NAM";
            dataGridView1.Columns[2].Name = "LASTNAME";
            dataGridView1.Columns[2].HeaderText = "    LASTNAME";
            dataGridView1.Columns[2].DataPropertyName = "LASTNAME";
            dataGridView1.Columns[3].Name = "BIRTHDAY";
            dataGridView1.Columns[3].HeaderText = "    BIRTHDAY";
            dataGridView1.Columns[3].DataPropertyName = "BIRTHDAY";
            dataGridView1.Columns[4].Name = "ADDRESS";
            dataGridView1.Columns[4].HeaderText = "    ADDRESS";
            dataGridView1.Columns[4].DataPropertyName = "ADDRESS";
            dataGridView1.DataSource = dt;
            con.Close();
        }

        private void Add_Click(object sender, EventArgs e)
        {
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = con;
            cmd.CommandType = System.Data.CommandType.StoredProcedure;
            cmd.CommandText = "PINFO";
            con.Open();
            cmd.Parameters.AddWithValue("@Surname", Surname.Text.Trim());
            cmd.Parameters.AddWithValue("@Nam", Nam.Text.Trim());
            cmd.Parameters.AddWithValue("@Lastname", Lastname.Text.Trim());
            cmd.Parameters.AddWithValue("@Birthday", Birthday.Text);
            cmd.Parameters.AddWithValue("@Address", Address.Text.Trim());
            try
            {
                cmd.ExecuteNonQuery();
                con.Close();
                Surname.Text = string.Empty;
                Nam.Text = string.Empty;
                Lastname.Text = string.Empty;
                Birthday.Text = string.Empty;
                Address.Text = string.Empty;
                dt.Clear();
                GetData();
                Surname.Focus();
            }
            catch
            {
                MessageBox.Show("Error: Data not saved in database!!!");
            }
        }
        private void Search_TextChanged(object sender, EventArgs e)
        {
            string cmd = "SELECT * FROM info WHERE SurName LIKE @surname + '%'";
            DataTable dt = new DataTable();

            using (SqlDataAdapter a = new SqlDataAdapter())
            {
                try
                {
                    a.SelectCommand = new SqlCommand();
                    a.SelectCommand.Connection = con;
                    a.SelectCommand.CommandType = CommandType.Text;
                    a.SelectCommand.CommandText = cmd;
                    a.SelectCommand.Parameters.AddWithValue("@surname", Search.Text);

                    a.Fill(dt);

                    dataGridView1.DataSource = dt;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message.ToString());
                }
            }

When I input “P” show all word begin to letter “P” it’s goog work. But I want four button go to next, End or Back record database.

Such:

How I can use these button when I click Button for End record I see end record in database. If I click Button for Next record only one step go and show second record database. Please help me!!!