Dear Aspose,

I am using you Java Aspose.Pdf.Kit with much success. Unfortunately I ran into a bug. If I concatenate 2 Pdf's and these Pdf's happen to have fields with the same name then one of the fields will have it's value overriden.

For example:
Pdf 1 has 1 page with a field with the name STREET with value test
Pdf 2 has 1 page with a field with the name STREET with value test2

The merged result will consist out of 2 pages and on both pages the STREET field will either have the value test or test2. The value changes eveytime I concatenate. It seems as if the actual value is randomly choosen.

Can you confirm this behaviour?

Hello Martyn,

I have tested the issue using Aspose.Pdf.Kit for java 2.1.0.0 and I am unable to notice the problem. Please share the Pdf files and the code snippet that you are using, so that we can test the issue at our end.

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Nayyer Shahbaz
Support Developer, Aspose Sialkot Team
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Hi Aspose,

I have attached a test java class that will demonstrate the problem. I couldn't upload the java file so I renamed it Concenate.txt. It contains the java class that demonstrates the problem.

The java application generates 3 Pdf's. The files output-1.pdf and output-2.pdf are the two pdf's that will be joined and the output-concenate.pdf file is the pdf with output-1.pdf and output-2.pdf joined.

The thing you should note is that in output-1.pdf the country is set to The netherlands. In output-2.pdf the country is set to Belgium. In the concenated file the country is set to The netherlands on both pages. The problem is that in the concenated file page 1 should have the country set to The netherlands and page 2 should have the country set to belgium.

Thanks,
Martyn Hiemstra

Hello Martyn,

I have tested the issue using the code snippet & the Pdf file that you have and I am able to notice the same problem. We are looking into the details of this matter, and will keep you updated with the status of correction.

We apologize for your inconvenience.

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Nayyer Shahbaz
Support Developer, Aspose Sialkot Team
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Hi Martyn,

I have logged this issue as PDFKITJAVA-6540. We will try to fix it soon.

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Tommy Wang
Lead Developer
Aspose Changsha Team
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Dear Martyn,

Thanks for considering Aspose.Pdf.Kit.

Technically, PdfFileEditor.concatenate just combines one file with another file, no matter what contents they may have. However, in one single PDF document a field name is required to be unique. Therefore, duplicated field names need to be modified automatically. Once it finished, we will inform you ASAP.

Because of that, after concatenating PDF docs with duplicated field names, you need to use a new field name to access the field. Is that acceptable for you? Thanks for your response.

Best regards. 

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Luke Fu
Product Developer
Aspose Changsha Team
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Hi Aspose,

Thanks your for your quick response. Changing the field names is the best solution. We want to print these concatenated forms automatically ( without user intervention ) so if the field names are altered then there isn't a problem.

It might be a problem if someone uses FormCalc. In FormCalc you can call fields and request there current value. If the field names change then the formcalc won't work anymore. I don't believe that this is something you need to consider right now but I did want to mention it so that you can take it into consideration.

Thanks for the great support,
Martyn Hiemstra

Dear Martyn,

Thanks for your good suggestion. Your viewpoint is quite right. We will consider about it and solve it ASAP. The ETA is about 2 weeks.

Best regards.

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Luke Fu
Product Developer
Aspose Changsha Team
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The issues you have found earlier (filed as 6540) have been fixed in this update.

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