private void btnPrint_Click(object sender, EventArgs e) { FrmReportView rep = new FrmReportView(); if (checkBox1.Checked) { rep.PrintReportReatreatProduct(prods, dateTimePicker1.Value.ToShortDateString(), dateTimePicker2.Value.ToShortDateString()); } else { rep.PrintReportReatreatProduct(prods); } rep.Show(); }