Export annotations function returns Object reference not set to an instance of an object.

[Mohamed]

Hello All,


I'm using PdfViewerController net core webApi for my angular pdf viewer. The issue happens when you leave the pdf loaded for 10 minutes sync fusion invalidates the cache and Export annotaion fucntion return the following error: Object reference not set to an instance of an object. 

Export API : 

[AcceptVerbs("Post")]

        [HttpPost("ExportAnnotations")]

        [Microsoft.AspNetCore.Cors.EnableCors("MyPolicy")]

        [Route("[controller]/ExportAnnotations")]

        //Post action to export annotations

        public IActionResult ExportAnnotations([FromBody] Dictionary<string, string> jsonObject)

        {

            PdfRenderer pdfviewer = new PdfRenderer(_cache);

            string jsonResult = pdfviewer.GetAnnotations(jsonObject);

            return Content(jsonResult);

        }
The highlighted line return the mentioned error. 
This happens after 10 minutes of calling load API.

Angular Call : 
this.pdfviewerControl.exportAnnotationsAsObject()


I've attached the webAPI file.

Thanks,
Mohamed

Attachment: PdfViewerController_430879cb.rar

[Akshaya Arivoli]

Hi Mohamed, 

Thank you for contacting Syncfusion support. 

We can reproduce the reported issue randomly, however we will analyze further on it and update you with more details on August 20, 2020 

Regards, 

Akshaya  

[Mohan Selvaraj]

Hi Mohamed,  

We confirm that the reported issue is a defect and the fix for this issue will be provided on September 2^nd  weekly NuGet release. 

https://www.syncfusion.com/feedback/17197/exception-thrown-on-performing-import-annotation-after-some-time-delay  

Regards,  

Mohan S

[Akshaya Arivoli]

Hi Mohamed,  

  

We have fixed the reported issue and the fix was included in our latest weekly NuGet release v18.2.0.56. Kindly upgrade to that version to resolve it  

 

https://www.syncfusion.com/feedback/17197/exception-thrown-on-performing-import-annotation-after-some-time-delay   

 

Packages link:     

      

Client side package	https://www.npmjs.com/package/@syncfusion/ej2-pdfviewer
Blazor Client	https://www.nuget.org/packages/Syncfusion.Blazor/
Blazor Sever	https://www.nuget.org/packages/Syncfusion.Blazor.PdfViewerServer.Windows
Service side package	ASP.NET Core :      https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Core.Windows/ https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Core.Linux/       https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Core.OSX/             ASP.NET MVC:      https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Mvc5/      https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Mvc4/

    

CDN links:    

    

https://cdn.syncfusion.com/ej2/18.2.56/material.css    

https://cdn.syncfusion.com/ej2/18.2.56/dist/ej2.min.js    

    

Regards,    

Akshaya    

Regards,