Merge Multiple PdfLoadedXfaDocument

Question

HiI am able to successfully open a single editable XFA PDF using PdfLoadedXfaDocument, populate the fields and save back to a file. What I would like to do is loop through several XFA forms, filling them out as I go, but only saving to a single file with multiple forms, once I have finished the loop.I am aware of the ability to merge several files from disk, but that seems wasteful to me.What is the most efficient way looping through several XFA forms, populating them then saving a single "Summary" file.Thanks

Gowthamraj Kumar · Accepted Answer

Hi Louise 

At present, we do not have support for merging with XFA PDF document. We have already logged the feature request for this “Need to add the support for merging XFA documents”. Currently, we do not have any immediate plans to implement this feature. We will let you know once the feature is implemented.       

The status of implementation can be tracked through our Feature Management System:       
https://www.syncfusion.com/feedback/2551/merge-xfa-pdf-documents  

Please refer the below documentation link for XFA, 
https://help.syncfusion.com/file-formats/pdf/working-with-xfa  

Regards, 
Gowthamraj K

Louise · Answer

Are you aware of any work arounds? I would be happy to flatten the XFA into a regular PDF and then merge, but Flatten appears to be broken with my document. See this forum thread Call To XFA Flatten Results In Null Reference Exception

Gowthamraj Kumar · Answer

Hi Louise, 

We do not have any workaround to merge the XFA PDF document. If you merge the XFA PDF document with other PDF files, the document will be merged but the XFA are removed. In last update, you want to flatten the XFA PDF document, we can flatten it by enabling the Flatten property of PdfLoadedXfaDocument and merge the documents. 
 
Please refer to the below documentation link for more details, 
UG: https://help.syncfusion.com/file-formats/pdf/working-with-xfa#flattening-xfa-form-fields 
KB: https://www.syncfusion.com/kb/10371/how-to-flatten-the-xfa-form-fields-in-c-and-vb-net 
Merge: https://help.syncfusion.com/file-formats/pdf/merge-documents 

Please follow up this forum (https://www.syncfusion.com/forums/173273/call-to-xfa-flatten-results-in-null-reference-exception) for reported issue. 

Regards, 
Gowthamraj K