1 Correct answer
You don't use a web service for this, it's just a regular HTML request. And no, FDF is not necessarily the way to go. It is usually more straight forward to submit as HTML and then just deal with what looks like a submission form a normal web form. From that point on, you are no longer dealing with anything that is specific to Adobe Acrobat. Take a look for example at this tutorial: Working with HTML Forms in ASP.NET Web Pages (Razor) Sites | The ASP.NET Site
Only if a "normal" forms submission
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Replies
Let's take a look at the submit options you have:
The same options that you see on the "Submit" dialog are also available via JavaScript.
You can submit a form as FDF, XFDF, HTML and the whole PDF document.
When you select the "HTML" option., you end up with exactly the same submission process that a web form would use, so if you an receive data from a web from, you can receive data from a PDF document. In the case of FDF, XFDF and PDF, the submission is done in a slightly different way. I don't know how to do this in C#, but I can tell you that the data is submitted as raw data in the HTML request. In PHP you would get access to it via "php://input". The following snippet shows you how to take that raw data and save it to a file (in this case, it assumes that the upload is a PDF file, but in case of FDF or XFDF, you can parse the data you get in "php://input"):
<?php
$target_dir = "uploads/";
$target_file = $target_dir . "upload.pdf";
copy("php://input", $target_file); // this is where the magic happens
// report status back to Acrobat/Reader via FDF
$status = "File successfully uploaded.";
header('Content-Type: application/vnd.fdf');
echo("%FDF-1.2\n%âãÏÓ\n1 0 obj\n<<\n/FDF\n\t<<\n\t/Status(");
echo($status);
echo("\t)>>\n>>\nendobj\ntrailer\n<</Root 1 0 R>>\n%%EOF");
?>
This snippet also shows how to report status back to the Acrobat or Reader application. As you can see, there is no error checking here, so that's stuff that you would need to add to make this production quality code.
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