Types of PDF Forms There are three primary types of PDF forms, each with distinct characteristics and use cases:   1. AcroForms Traditional and most common type of PDF forms. Created using tools like Adobe Acrobat.   2. Static XFA PDF Forms ... Read More

Dynamic XFA PDF forms contain backup placeholder content in addition to the XFA data describing the fields and content of the form. The placeholder content can vary but is typically a warning to upgrade or use Adobe Reader.  When a dynamic XFA PDF... Read More

Use this code to programmatically determine if a PDF document is an AcroForm: bool hasAcroFormFields = false;if(doc.Root.Contains("AcroForm")){var AcroFormDict = doc.Root.Get("AcroForm") as PDFDict;hasAcroFormFields = AcroFormDict.Contains("Fields") ... Read More

Using the Adobe PDF Library, you can access the XML structure behind an XFA form field. XFA, or XML Forms Architecture, is a set of proprietary XML specifications for use with web forms. XFA forms are saved within a PDF document. If you want to merge... Read More

There are two (or three) types of PDF forms: AcroForm and XFA (static and dynamic):  AcroForms are the traditional, most common type of PDF forms;  These can be created using Adobe Acrobat. Static XFA PDF forms contain an XML stream that contains... Read More