In Crystal Report When refresh they asking You can provide a single value for this parameter.
enter the value you want to include.
Discrete Values________________
string strReportPath = "";
CrystalDecisions.CrystalReports.Engine.ReportDocument rpt = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
DataSet ds = new DataSet();
ds = fnPrintLoanClosed(CNo);
strReportPath = Application.StartupPath + "\\Reports\\InterestCalc.rpt";
rpt.Load(strReportPath);
rpt.SetDataSource(ds);
rpt.Refresh();
crystalReportViewer1.ReportSource = rpt;
crystalReportViewer1.RefreshReport(); ----------------------> [her they asking discrete values_______________]
crystalReportViewer1.ShowCloseButton = true;
crystalReportViewer1.DisplayGroupTree = false;
crystalReportViewer1.ShowRefreshButton = true;
crystalReportViewer1.ShowGroupTreeButton = true;
crystalReportViewer1.ShowPrintButton = true;