Trying to Merge pdfs, get an NullReferenceException

[Luis Campuzano]

Hello guys,

I'm trying to Merge pdfs using this documentation "https://help.syncfusion.com/file-formats/pdf/merge-documents#merging-multiple-documents-from-disk-and-stream ", but I got the NullReferenceException (see screenshot). My Question is, How I can merge pdfs?

See also the project zipped for reference.

Attachment: MergingPdfsNotWorking_20230404_170175f2.zip

[Irfana Jaffer Sadhik]

We suggest opening the PDF document using streams instead of strings. we provide support to open an existing document from the stream by using PdfLoadedDocument class in the ASP.NET Core Platform. You can refer to the following documentation in ASP.NET core platforms for further details.

https://help.syncfusion.com/file-formats/pdf/merge-documents?cs-save-lang=1&cs-lang=csharp

Modified code:

PdfDocument finalDoc = new PdfDocument();

            FileStream stream1 = new FileStream(PathConstants.DocumentMerge1, FileMode.Open, FileAccess.Read);

            FileStream stream2 = new FileStream(PathConstants.DocumentMerge2, FileMode.Open, FileAccess.Read);

            //Creates a PDF stream for merging.

            Stream[] streams = { stream1, stream2 };

Try this on your end and let us know the result

[Luis Campuzano]

It works this way.

Thanks.