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Hi, we have created a PDF Form following your sample.
The Form seem to be be correctly generated, but when opening with Acrobat Reader 9 we get a worning and data could not be saved.
It seems that Adobe introduced some restrictions in Acrobat Reader 9:
I have no direct experience in enabling filled forms to be locally saved through Adobe Reader but, according to the official documentation , such a capability has to be activated through Acrobat (attended/desktop context) or LiveCycle Reader Extensions (unattended/server context). My best bet is that you should force Adobe Reader to send the filled data through a Submit action (I'll add an example in PDF Clown within the next few weeks) instead; in case your user needed a local copy of the submission, your server could send it back via email or whatever else.
"Can I save an Adobe PDF form in Reader after I have filled it out?", http://www.adobe.com/products/reader/faq.html
Thanks Stefano for your suggestion.
With Acrobat Professional a user can set an advanced option for creating forms with save option enabled: do you think that it could be possible to implement this function also in PdfClown?
AFAIK, no public spec is available; furthermore, as local-save lock on Adobe Reader is a creepy dysfunction due to proprietary policies on a proprietary tool, I'm not interested in circumvent them. According to Leonard Rosenthol , local-save unlock involves asymmetric key cryptography, thus precluding its generation by operators other than Adobe.
I agree with you: if there is not an API in Adobe SDK for enabling save, we are not interested in hacking proprietary policies.