Dynamic Images not shown on report in web farm environment

Question

I have a custom ASP .NET application running reports on XIR2 platform using the .NET WCA.  This is in a web farm environment.  Reports with images do not reliably work.  It appears that the WCA temp image handler cannot see the files if my session fails from one server in the farm to the next.  I'm looking to move the temp images location to an external file share so that all servers will see it.  Changing the value in web.config for the temp images directory did not work.  Tomorrow I will test changing the registry setting, but I wonder if anyone has any tips?
Chris

Answer 1

Hi, Ted,
I am not the application developer, but rather the server administrator.  I know that the applications are NOT using viewrpt.cwr.  I can not state with confidence that they are using the CR .NET Web Forms viewer.  I know that some of our applications show their reports in the ActiveX Viewer, and some use the DHTML viewer.  The following is the code (in the aspx page) that is used to execute the report (I hope it helps):
          void ViewerSetting()
                    try
                         bool bHasRefreshButton =Request.QueryString["bRefresh"]=="Y"?true:false;
                         bool bHasToggleGroupTreeButton=Request.QueryString["bToggleGroupTree"]=="N"?false:true;
                         bool bHasZoomFactorList=Request.QueryString["bZoomFactor"]=="N"?false:true;
                         bool bDisplayGroupTree=Request.QueryString["bGroupTree"]=="N"?false:true;
                         bool bBestFitPage =true;
                         bool bDisplayBottomToolbar =Request.QueryString["BottomToolbar"]=="N"?false:true;
                         bool bHasCrystalLogo =Request.QueryString["CrystalLogo"]=="N"?false:true;
                         bool bHasExportButton =Request.QueryString["ExportButton"]=="N"?false:true;
                         bool bDisplayToolbar =Request.QueryString["Toolbar"]=="N"?false:true;
                         bool bHasGotoPageButton=Request.QueryString["GotoPageButton"]=="N"?false:true;
                         bool bHasSearchButton =Request.QueryString["SearchButton"]=="N"?false:true;
                         string sPrintMode=Request.QueryString["PrintMode"]==null?ConfigurationSettings.AppSettings["PrintMode"].Trim():Request.QueryString["PrintMode"].ToString();
                         crystalReportViewer.HasRefreshButton=bHasRefreshButton;
                         crystalReportViewer.HasToggleGroupTreeButton=bHasToggleGroupTreeButton;
                         crystalReportViewer.HasZoomFactorList=bHasZoomFactorList;
                         crystalReportViewer.DisplayGroupTree=bDisplayGroupTree;
                         crystalReportViewer.BestFitPage=bBestFitPage;
                         crystalReportViewer.DisplayBottomToolbar=bDisplayBottomToolbar;
                         crystalReportViewer.HasCrystalLogo=bHasCrystalLogo;
                         crystalReportViewer.HasExportButton=bHasExportButton;
                         crystalReportViewer.DisplayToolbar=bDisplayToolbar;
                         crystalReportViewer.HasGotoPageButton=bHasGotoPageButton;
                         crystalReportViewer.HasSearchButton=bHasSearchButton;
                         if (sPrintMode.ToUpper() =="ACTX")
                              crystalReportViewer.PrintMode=CrystalDecisions.Web.PrintMode.ActiveX;
                         else
                              crystalReportViewer.PrintMode=CrystalDecisions.Web.PrintMode.Pdf;
                    catch {}
               void SetParameterandViewReport()
                         try
                              ViewerSetting();
                        string sServer = ConfigurationManager.AppSettings["APSServer"].Trim();
                        string sUser = ConfigurationManager.AppSettings["APSUser"].Trim();
                        string sPassword = ConfigurationManager.AppSettings["APSPassword"].Trim();
                        string sAuthType = ConfigurationManager.AppSettings["APSAuthType"].Trim();
                              string sReportName = Request.QueryString["ReportName"];
                              EnterpriseSession ceSession;
                              EnterpriseService ceEnterpriseService;
                              InfoStore ceInfoStore;
                              InfoObjects ceReportObjects ;
                              InfoObject ceReportObject ;
                              CrystalDecisions.Enterprise.Desktop.Report  ceReport;
                              ParameterFields  ceParameterFields;
                              ParameterField ceParameterField;
                              ReportParameters ceParameters ;
                              ReportParameter ceParameter ;
                              ParameterDiscreteValue ceParameterDiscreteValue;
                              SessionMgr ceSessionMgr= new SessionMgr();
                              if ( Session ["ceSession"] == null)
                                   ceSession = ceSessionMgr.Logon(sUser, sPassword, sServer, sAuthType);
                                   Session ["ceSession"]=ceSession;
                              else
                                   ceSession = (EnterpriseSession) Session ["ceSession"];
                              ceEnterpriseService = ceSession.GetService("InfoStore");
                              ceInfoStore = new  InfoStore(ceEnterpriseService);
                              string sQuery = "Select * From CI_INFOOBJECTS Where SI_PROGID = 'CrystalEnterprise.Report' AND SI_Name='" + sReportName + "' And SI_INSTANCE=0";
                              ceReportObjects = ceInfoStore.Query(sQuery);
                              if (ceReportObjects.Count <1 )
                                   lblMessage.Text="Please check your reportName";
                                   lblMessage.Visible=true;
                                   return ;
                        ceReportObject = ceReportObjects[1];
                        ceReport = (CrystalDecisions.Enterprise.Desktop.Report)ceReportObject;
                        ceParameters = ceReport.ReportParameters;
                        ceParameterFields = new ParameterFields();
                              if (ceReportObjects.Count > 0)
                                   ceReportObject = ceReportObjects[1];
                                   ceReport  =(CrystalDecisions.Enterprise.Desktop.Report) ceReportObject;
                                   ceParameters = ceReport.ReportParameters;
                                   ceParameterFields = new ParameterFields();
                                   string sParamName="",sParamValue="";
                                   string sPrompt="";
                                   for (int i=1; i <= ceParameters.Count; i++ )
                                        sPrompt="Prompt"+(i-1).ToString().Trim();
                                        ceParameter =ceParameters<i>;
                                        sParamName=     ceParameter.ParameterName.Trim();
                                        sParamValue= Request.QueryString[sPrompt]==null?"": Request.QueryString[sPrompt];     
                                        ceParameterField = new ParameterField();
                                        ceParameterDiscreteValue = new ParameterDiscreteValue();
                                ceParameterDiscreteValue.Value = sParamValue;
                                ceParameterField.CurrentValues.Add(ceParameterDiscreteValue);
                                        ceParameterField.Name = ceParameter.ParameterName;
                                        ceParameterField.ParameterValueType = ParameterValueKind.StringParameter;
                                        ceParameterFields.Add(ceParameterField);
                                   crystalReportViewer.ParameterFieldInfo = ceParameterFields;
                                   crystalReportViewer.EnterpriseLogon = ceSession;
                                   crystalReportViewer.ReportSource = ceReportObject;
                                      crystalReportViewer.Visible = true;
                         catch (Exception ex)
                              lblMessage.Text = ex.Source + ex.Message + ex.StackTrace; 
                              lblMessage.Visible=true;
Thanks,
Chris Peet