Last Updated: 18 Jan 2021 09:09 by ADMIN
Release 2021.R1
Created on: 26 May 2020 11:06
Category: PDFViewer
Type: Bug Report
Server side exception when serializing FixedDocument

Bug report

A server side exception:
System.OverflowException: 'Value was either too large or too small for a Double.'
is thrown on attempting to serialize an existing .pdf file converted to FixedDocument.

Reproduction of the problem

  1. Use the DPL Processing demo of the PDFViewer in the MVC demos project.
  2. Instead of the default sample.pdf load the Development Plan.pdf file provided in Ticket ID: 1467984
public ActionResult GetInitialPdf(int? pageNumber)
    //exception with Development plan.pdf file:
    string filePath = Path.Combine(Server.MapPath("~/Content/web/pdfViewer"), "Development Plan.pdf");
    //it works with the sample.pdf file:
    //string filePath = Path.Combine(Server.MapPath("~/App_Data"), "sample.pdf");
    FileStream stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
    JsonResult jsonResult;
    FixedDocument doc = FixedDocument.Load(stream);

    if (pageNumber == null)
        jsonResult = Json(doc.ToJson(), JsonRequestBehavior.AllowGet);
        jsonResult = Json(doc.GetPage((int)pageNumber), JsonRequestBehavior.AllowGet);

    jsonResult.MaxJsonLength = int.MaxValue;
    return jsonResult;

Current behavior

The exception is thrown during the FixedDocument JSON serialization:


at the following place: ConvertToList method in ArrayExtension class (Telerik.Web.PDF namespace)

Expected/desired behavior

No exceptions are thrown during serialization.


  • Kendo UI version: 2020.2.513
  • jQuery version: x.y
  • Browser: [all]