Which is Best Way passing Parameters in crystal reports

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C#

CrystalReports

hi,

Iam using crystal Reports in my c#.

i want to know which is best and fastest way getting reports

1.Passing Parameters thru coding like below

ReportDocument cryRpt = new ReportDocument();
                cryRpt.Load(AppDomain.CurrentDomain.BaseDirectory + "/Reports/PurchaseReturn.rpt");
                ParameterFieldDefinitions crParameterFieldDefinitions;
                ParameterFieldDefinition crParameterFieldDefinition;
                ParameterValues crParameterValues = new ParameterValues();
                ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

                crParameterDiscreteValue.Value = PId;
                crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
                crParameterFieldDefinition = crParameterFieldDefinitions["@PId"];
                crParameterValues = crParameterFieldDefinition.CurrentValues;

or
2.

DataSet PurchaseInvoiceReport = bllPurchaseInvoice.PurchaseInvoiceReport(PINo);

              cryRpt.SetDataSource(PurchaseInvoiceReport.Tables[0]);
              obj.crystalReportViewer1.ReportSource = cryRpt;
              obj.crystalReportViewer1.Refresh();
              clsCR.ApplyLogonToTables(cryRpt);

              obj.ShowDialog();

Pls help

Regards
Nirmala Devi