Crystal Report：缺少PDF導出中的參數值

我有一個.NET 3.5 Web應用程序的Visual Studio 2008。我正在使用Crystal報告版本10.5進行報告。我需要將水晶報告導出到PDF文件。當我在不設置參數的情況下導出PDF文件中的報告時，它工作正常。但是，當我將參數傳遞到報表中出現下面的問題Crystal Report：缺少PDF導出中的參數值

"Missing parameter values." 

    at CrystalDecisions.ReportAppServer.ConvertDotNetToErom.ThrowDotNetException(Exception e) 
    at CrystalDecisions.ReportSource.EromReportSourceBase.ExportToStream(ExportRequestContext reqContext) 
    at CrystalDecisions.CrystalReports.Engine.FormatEngine.ExportToStream(ExportRequestContext reqContext) 
    at CrystalDecisions.CrystalReports.Engine.FormatEngine.Export(ExportRequestContext reqContext) 
    at CrystalDecisions.CrystalReports.Engine.FormatEngine.Export() 
    at CrystalDecisions.CrystalReports.Engine.ReportDocument.Export() 
    at Web.Manager.GetReport() in c:\Model 2008 \mypage.aspx.cs:line 267

下面是代碼

private void GetReport(Dataset dsModel) 
    { 
     ReportDocument crReportDocument; 
     crReportDocument = new ReportDocument(); 
     crReportDocument.Load(Server.MapPath("MyReport.rpt")); 

     ParameterValues pvValues = new ParameterValues(); 
     ParameterDiscreteValue pdvDiscreteValue = new ParameterDiscreteValue(); 
     pdvDiscreteValue.Value = Session["myname"].ToString(); 
     pvValues.Add(pdvDiscreteValue); 
     ParameterFieldDefinitions pfdDefinitions = crReportDocument.DataDefinition.ParameterFields; 
     ParameterFieldDefinition prdDefinition = pfdDefinitions["Parameter1"]; 
     prdDefinition.ApplyCurrentValues(pvValues); 


      crvManagerByBank.Visible = true; 
      crReportDocument.SetDataSource(dsModel); 
      crvManagerByBank.ReportSource = crReportDocument; 
      string Fname = ConfigurationSettings.AppSettings["TempFolder"]; 
      Fname = Fname + Session.SessionID.ToString() + ".pdf"; 
      ExportOptions crExportOptions = new ExportOptions(); 
      DiskFileDestinationOptions crDiskFileDestinationOptions = new DiskFileDestinationOptions(); 

      crDiskFileDestinationOptions.DiskFileName = Fname; 
      crExportOptions = crReportDocument.ExportOptions; 
      crExportOptions.DestinationOptions = crDiskFileDestinationOptions; 
      crExportOptions.ExportDestinationType = ExportDestinationType.DiskFile; 

      crExportOptions.ExportFormatType = ExportFormatType.PortableDocFormat; 

      try 
      { 
       crReportDocument.Export(); -- Showing error in this line 
      } 
      catch (Exception) 
      { 

       throw; 
      } 

      Response.ClearContent(); 
      Response.ClearHeaders(); 

      Response.ClearContent(); 
      Response.ClearHeaders(); 
      Response.ContentType = "application/pdf"; 
      Response.AddHeader("content-disposition", "attachment;filename=" + Fname); 
      Response.TransmitFile(Fname); 
      HttpContext.Current.ApplicationInstance.CompleteRequest(); 
      Response.Flush(); 
      Response.Close(); 
      System.IO.File.Delete(Fname); 

     } 
    }

拋出異常時，它調用導出（）函數。

來源

2015-06-11 Pankaj Saha

打開MyReport.rpt文件並檢查那裏的報告參數。也許你可以發佈他們的打印屏幕。你必須填寫所有這些參數。奇怪的是：在代碼中我看不到任何參數名稱。我錯過了什麼？ – heringer

-1

謝謝大家對我的支持。我在export（）函數之前添加了下面的行。

try 
      { 
crReportDocument.SetParameterValue("Parameter1", Convert.ToString(Session["myname"])); 

       crReportDocument.Export(); 
      } 
      catch (Exception) 
      { 

       throw; 
      }

來源

2015-06-11 12:19:40

Crystal Report：缺少PDF導出中的參數值

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