水晶報告的子報表中的數據不能讀取

Question

我在子報表中讀取數據時有一些問題。在水晶報表數據在適當的方式獲取，但是當我在子報告單擊它顯示「沒有有效的報表源可用」

protected void btnSearch_Click(object sender, EventArgs e) 
     { 
      ReportDocument rptDoc = new ReportDocument(); 
      ComplaintTrackingSystem.Reports.Datas dss = new Reports.Datas(); 
      DataTable dt = new DataTable(); 
      // Just set the name of data table 
      DataSet ds; 
      Hashtable ObjParameters = new Hashtable(); 
      BusinessLogicLayer ObjBusiness = new BusinessLogicLayer(); 
      ObjParameters.Add("@From", dateFrom.SelectedDate.ToShortDateString()); 
      ObjParameters.Add("@To", dateTo.SelectedDate.ToShortDateString()); 
      ds = ObjBusiness.SPDataSet(ObjParameters, "ReportForAverageCompt"); 
      dt.TableName = "Crystal Report Example"; 
      dt = ds.Tables[0]; //This function is located below this function 
      dss.Tables[0].Merge(dt); 
      // Your .rpt file path will be below 
      rptDoc.Load(HttpContext.Current.Server.MapPath("../Reports/AverageReport.rpt")); 
      //set dataset to the report viewer. 
      rptDoc.SetDataSource(dss); 
      CrystalReportViewer1.ReportSource = rptDoc; 
      Session["Report"] = rptDoc; 
      ComplaintTrackingSystem.Reports.Datas dssNew = new Reports.Datas(); 
      ds.Clear(); 
      ds = ObjBusiness.SPDataSet(ObjParameters, "ReportForResolvedCompt"); 
      dt.TableName = "Crystal Report"; 
      dt = ds.Tables[0]; //This function is located below this function 
      dssNew.Tables[0].Merge(dt); 
      //set dataset to the report viewer. 
      rptDoc.Subreports["AdminReport.rpt"].SetDataSource(dssNew); 
      rptDoc.Refresh(); 
      CrystalReportViewer1.ReportSource = rptDoc; 

     } 

Answer 1

這在觀衆發生的事情，對不對？如果是這樣，錯誤可能是觀衆無法在會話中找到報告的結果。檢查線程「No valid report source is available. in asp.net sap crystal report」。