protected void Page_Load(object sender, EventArgs e)
{
     OleDbConnection cn = new OleDbConnection(ConnString);
     cn.Open();
     String sql = "SELECT MAX(DATA_SCARICO) AS DATA FROM LAVORAZIONE_ESIGENZE_CHIUSE";

     OleDbCommand cmd = new OleDbCommand(sql, cn);
     OleDbDataReader rdr = cmd.ExecuteReader();
     rdr.Read();
       
     Label1.Text = "Dati aggiornati al: " + rdr[0].ToString().Substring(0, 11);

     rdr.Close();
     cn.Close();
}