private void ShowrptChi(int ma) { ThuChi.BLL.TrptChi trptChi = new ThuChi.BLL.TrptChi(); DataTable dt = trptChi.SetData(ma); rptPhieuChi rpt = new rptPhieuChi(); rpt.SetDataSource(dt); crystalReportViewer1.ReportSource = rpt; crystalReportViewer1.Refresh(); dt.Clear(); }