coding a Next button to advance to next row of data table

Question

I have a form with two panels. A button click makes my second panel visible which has several textboxes bound to a database through the use of a DataTable and SqlDataAdapter.

private void btnViewAgents_Click(object sender, EventArgs e)

{

pnlAgents.Visible = true;

SqlCommand SelAgts = new SqlCommand("SELECT * FROM myTable ORDER BY last_name", misc);

DataTable dt = new DataTable();

SqlDataAdapter da = new SqlDataAdapter(SelAgts);

da.Fill(dt);

misc.Open();

txtLName.Text = dt.Rows[0]["last_Name"].ToString();

txtFName.Text = dt.Rows[0]["first_name_mi"].ToString();

txtAgt.Text = dt.Rows[0]["agency_use"].ToString().Substring(0, 5);

txtStore.Text = dt.Rows[0]["agency_use"].ToString().Substring(6, 19);

...

...

misc.Close();

}

I now have two other buttons on this panel, next and previous that I need to have move to the next or previous row in the table. So basically on the next button click I need each textbox to advance from row 0 to 1 and so on with each click.