winforms - 第二次绑定报表时本地报表处理出错

Question

我reportviewer用来报告的问题是，当我第一次绑定报告时，意味着当用户从组合框中选择报告类型时，它会完美显示，但是当用户从组合框中选择第二个选项时，它会给我错误An error occurred during local report processing。为了您的审查，我提供了代码

switch (cmbReports.SelectedValue.ToString())
                {
     case "01":
     #region Salaries and Wages Ytd
     ReportParameter pCase1 = new ReportParameter("reportHeading", "SALARIES AND WAGES TRENDS (US$) FOR THE YEAR AS AT :" + taxmnth);
     _parmList.Add(pCase1);
     List<FiscalPeriod> _FisclList = new List<FiscalPeriod>();
       if (AcctPrd == crntActPrd)
         _FisclList = _reportComp.getGraphRpt_salWageY2d(crntActPrd);
       else
          _FisclList = _reportComp.getGraphRpt_salWageY2d_hist(AcctPrd);
          ReportDataSource rds1 = new ReportDataSource("dsFiscalPrd", _FisclList);

           this.reportViewerGraph.ProcessingMode = ProcessingMode.Local;
           LocalReport repCase1 = reportViewerGraph.LocalReport;
           repCase1.DataSources.Clear();
           repCase1.ReportPath = ConfigurationSettings.AppSettings["GraphicalReportPath"].ToString() + @"Sal_WagesY2dReport.rdlc";
           repCase1.SetParameters(_parmList);
           repCase1.DataSources.Add(rds1);
           repCase1.Refresh();
           this.reportViewerGraph.RefreshReport();
         #endregion
            break;
       case "02":
             printType();
           #region Incomes Ytd
            ReportParameter pCase2 = new ReportParameter("reportHeading", " INCOMES (US$) FOR THE YEAR AS AT: " + taxmnth);
             _parmList.Add(pCase2);
             List<FiscalPeriod> _FisclList1 = new List<FiscalPeriod>();
             if (AcctPrd == crntActPrd)
                  _FisclList1 = _reportComp.getGraphRpt_WFAnalysisY2d(crntActPrd);
             else
                 _FisclList1 = _reportComp.getGraphRpt_WFAnalysisY2d_hist(AcctPrd);
                 ReportDataSource rds2 = new ReportDataSource("dsfiscalperiod", _FisclList1);

                  this.reportViewerGraph.ProcessingMode = ProcessingMode.Local;
                  LocalReport repCase2 = reportViewerGraph.LocalReport;
                  repCase2.DataSources.Clear();
                  repCase2.ReportPath = ConfigurationSettings.AppSettings["GraphicalReportPath"].ToString() + @"IncomesY2dReport.rdlc";
                  repCase2.SetParameters(_parmList);
                  repCase2.DataSources.Add(rds2);
                  repCase2.Refresh();
                  this.reportViewerGraph.RefreshReport();
                #endregion
                  break;
}

你能告诉我我做错了什么吗？