ReportViewer1.LocalReport.ReportPath = Server.MapPath("reports/EPE.rdlc");
ReportDataSource rdS = new ReportDataSource("X_NAL", GetData());
ReportViewer1.LocalReport.DataSources.Clear();
ReportViewer1.LocalReport.DataSources.Add(rdS);
ReportParameter rpyear = new ReportParameter("Year", drpyrsal.SelectedValue);
ReportViewer1.LocalReport.SetParameters(new ReportParameter[] { rpyear });
this is wht i alreay have & getting error at the parameter line
parameter already declared in the report