crystalReportViewer1.ReportSource = crpt2;
crystalReportViewer1.SelectionFormula= "{Orders.Date_orders}>='"+dateTimePicker1.Text+"' And {Orders.Date_orders}<='"+dateTimePicker2.Text+"'";
break;
case "3":
ServiceReport crpt3 = new ServiceReport();
crystalReportViewer1.ReportSource = crpt3;
crystalReportViewer1.SelectionFormula= "{Service.Date_ser}>='"+dateTimePicker1.Text+"' And {Service.Date_ser}<='"+dateTimePicker2.Text+"'";
break;
case "4":
ToothArrangeReport crpt4 = new ToothArrangeReport();
crystalReportViewer1.ReportSource = crpt4;
crystalReportViewer1.SelectionFormula= "{Service.Date_ser}>='"+dateTimePicker1.Text+"' And {Service.Date_ser}<='"+dateTimePicker2.Text+"' And {Treatment.Id_treat}=6";
break;