void Page_Load(Object sender, EventArgs e)
{
  
  // Dynamically generated field pagers need to be created only 
  // the first time the page is loaded.
  
  if (!IsPostBack)
  {
    // Create a NextPreviousPagerField object to display
    // the buttons to navigate.
    NextPreviousPagerField pagerField = new NextPreviousPagerField();
    pagerField.ShowFirstPageButton = true;
    pagerField.ShowLastPageButton = true;
    pagerField.ButtonType = ButtonType.Button;

    // Add the pager field to the Fields collection of the
    // DataPager control.
    ContactsDataPager.Fields.Add(pagerField);
  }

  ContactsListView.DataBind();

}