private void Button2_Click(object sender, EventArgs e)
{
1.  int iPos;
2.  iPos = this.BindingContext[ds, "stTable"].Position + 1;
3.  if (iPos > 0)
    {
4.    this.BindingContext[ds, "stTable"].Position -= 1;
5.    textRecord.Text = Convert.ToString(this.BindingContext[ds, "stTable"].Position + 1);
    }
}
