RptReceipt rpt = new RptReceipt(dtCurrent); //dtCurrent是DataTable
                    rpt.ReportUnit = DevExpress.XtraReports.UI.ReportUnit.TenthsOfAMillimeter;
                    rpt.PaperKind = System.Drawing.Printing.PaperKind.Custom;
                    rpt.PrintingSystem.ShowMarginsWarning = false;
                    try
                    {
                        rpt.PageHeight = 1300;
                        rpt.PageWidth = 880;
                        rpt.Margins.Left = 10;
                        rpt.Margins.Right = 10;
                        rpt.Margins.Top = 10;
                        rpt.Margins.Bottom = 10;
                    }
                    catch
                    {
                        PrintDocument pd = new PrintDocument();
                        rpt.PageHeight = pd.DefaultPageSettings.PaperSize.Height;
                        rpt.PageWidth = pd.DefaultPageSettings.PaperSize.Width;
                    }
                    rpt.Print();