Error While Calling "Prepare" Function

Comments

• dmiranda

  February 2018 edited 7:03AM

  Hello,
  
  There was founded a solution for this issue? I have a similar error with an C# .Net application. In my case, I need to export as a txt file before printing. Here is the source code:
  
  using (fast.Report report = new fast.Report())
  {
  report.Load(rutaReporte);
  report.Dictionary.RegisterData(conjuntoDatos, nombreDataset, true);
  report.ReportInfo.Name = nombreDocumentoGenerar;
  report.Prepare();
  
  // some extra code
  using (TextExport export = new TextExport())
  {
  export.SetReport(report);
  export.PrintAfterExport = true;
  export.PrinterName = "MyMatrixPrinter";
  export.PageBreaks = false;
  export.Encoding = Encoding.GetEncoding(1200);
  export.EmptyLines = true;
  export.Frames = false;
  export.ScaleX = 1.0;
  export.ScaleY = 1.10;
  export.Export(report, rutaExportacionReporte);
  }
  // some extra code
  }
  
  This code is within a loop, and the number of documents going to print is of about 500, but for about 5 documents it is thrown this error:
  
  System.ObjectDisposedException: Cannot access a disposed object.
  ObjectName: 'ProgressForm'.
  at System.Windows.Forms.Control.CreateHandle()
  at System.Windows.Forms.Form.CreateHandle()
  at System.Windows.Forms.Control.get_Handle()
  at System.Windows.Forms.Form.CreateHandle()
  at System.Windows.Forms.Control.get_Handle()
  
  // many many lines with the same message
  
  at System.Windows.Forms.Form.CreateHandle()
  at System.Windows.Forms.Control.get_Handle()
  at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
  at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
  at System.Windows.Forms.Control.Show()
  at FastReport.ReportSettings.OnStartProgress(Report report)
  at FastReport.Engine.ReportEngine.Run(Boolean runDialogs, Boolean append, Boolean resetDataState, ReportPage page)
  at FastReport.Report.Prepare(Boolean append)
  at FastReport.Report.Prepare()
  at //My source code
  
  I'm using FastReport.Net v2018.1.6. Thakns in advance.
  
  Greetings
  Daniel Miranda
• ipong

  February 2018 edited February 2018

  500 reports??? are you using background thread? maybe cross thread problem?
  
  try to shut-off progress window:
  FastReport.Utils.Config.ReportSettings.ShowProgress = false;
  
  
• dmiranda

  February 2018 edited 7:03AM

  ipong wrote: »

  500 reports??? are you using background thread? maybe cross thread problem?
  
  try to shut-off progress window:
  FastReport.Utils.Config.ReportSettings.ShowProgress = false;

  
  Exactly, this is a background process (a windows service indeed) which uses Parallel.Foreach to execute the early code in palallel (for instance "3 threads", each one for one printer) for a total of about 1500 documents. Here is some extra source code:
  
  Parallel.ForEach(listaImpresorasPuntoEmision,
  new ParallelOptions
  {
  MaxDegreeOfParallelism = cantidadImpresorasADD,
  CancellationToken = cancelationTokenSource.Token
  },
  
  //early source code
  
  );
  
  Adding FastReport.Utils.Config.ReportSettings.ShowProgress = false; seems to solve the problem; after several tests the error has not been thrown anymore.
  
  Thanks a lot ipong!!
  
  Greetings,
  Daniel