public virtual CrystalDecisions.CrystalReports.Engine.ReportDocument CreateReport()
        {
            Attestation rpt = new Attestation();

            rpt.Site = this.Site;
            return(rpt);
        }
        private void button_Afficher_Click(object sender, EventArgs e)
        {
            Attestation att = new Attestation();

            att.SetParameterValue("NumA", int.Parse(comboBox_NumA.Text));
            crystalReportViewer1.ReportSource = att;
        }