Loading certain pdf file using Windows.Data.Pdf.PdfDocument causes AggregateException

Question

Hi,

We are trying to load certain PDF documents using Windows.Data.Pdf.PdfDocument but we were unable to output IAsyncOperation it shows System.AggregateException: 'One or more errors occurred. while loading these PDFs. other PDFs are loading correctly.

I have attached code to replicate this issue.

we have also attached files that cause issues on the following link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/202303_ad542d9a-799861967

 private async Task<IRandomAccessStream> ConvertToRandomAccessStream(MemoryStream stream)  
{      
	try      
	{          
		var bytes = new byte[stream.Length];  
        stream.Position = 0;          
		stream.Read(bytes, 0, bytes.Length);
           StorageFolder folder = 			global::Windows.Storage.ApplicationData.Current.TemporaryFolder;
          string m_localDocumentID = "temp" + Guid.NewGuid().ToString() + ".pdf";          StorageFile sampleFile = await folder.CreateFileAsync(m_localDocumentID, CreationCollisionOption.ReplaceExisting);           global::Windows.Storage.Streams.IRandomAccessStream fileStream = await sampleFile.OpenAsync(FileAccessMode.ReadWrite);          
			Stream streamToBeWritten = fileStream.AsStreamForWrite();
          streamToBeWritten.SetLength(0);          
		streamToBeWritten.Write(bytes, 0, bytes.Length); 
         streamToBeWritten.Flush();          
		streamToBeWritten.Dispose(); 
          StorageFile file = await ApplicationData.Current.TemporaryFolder.GetFileAsync(m_localDocumentID);          return await file.OpenAsync(FileAccessMode.ReadWrite);
      }      
catch (Exception)      
{          
return null;      
}  
}   

private async void Loadbtn_Click(object sender, RoutedEventArgs e)  
{
      Stream FileStream = typeof(MainPage).GetTypeInfo().Assembly.GetManifestResourceStream($"SampleApplication.Assets.2023─Ω03╘┬┴∙╝╢╜Γ╬÷╚½3╠╫.pdf");      
MemoryStream memoryStream = new MemoryStream();      
FileStream.Position = 0;      
FileStream.CopyTo(memoryStream);      
IRandomAccessStream randomStream;      
randomStream = await ConvertToRandomAccessStream(memoryStream as MemoryStream);      IAsyncOperation<global::Windows.Data.Pdf.PdfDocument> result;      
result = global::Windows.Data.Pdf.PdfDocument.LoadFromStreamAsync(randomStream);      result.AsTask().Wait(); 
}

Answer 1

Hi @ManojKumar ,

Welcome to Microsoft Q&A!

It is recommended to convert these two files into PDF file again.

This should be a problem with the PDF file format, one characteristic of these files is that they all have specific file permissions. I'm not sure yet what's causing the issue.

In my test, I used Edge to open your two files, used the print(ctrl+p) function in Edge, and after re-exporting the pdf, the API worked.

Thank you.

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