private void loginB_Click(object sender, EventArgs e) { businesslayer bl = new businesslayer(); MySqlDataReader dr = bl.profit(firstDate.Value.ToString("yyyy-MM-dd"), endDate.Value.ToString("yyyy-MM-dd")); if (dr.Read()) { if (!dr.IsDBNull(0)) { String temp = dr.GetString(0); proftext.Text = temp + "L.E."; } else { proftext.Text = "0 L.E."; } } else { proftext.Text = "0 L.E."; } }