Class FDFDoc

FDFDoc is a class representing Forms Data Format (FDF) documents. FDF is typically used when submitting form data to a server, receiving the response, and incorporating it into the interactive form. It can also be used to export form data to stand-alone files that can be stored, transmitted electronically, and imported back into the corresponding PDF interactive form. In addition, beginning in PDF 1.3, FDF can be used to define a container for annotations that are separate from the PDF document to which they apply.

Inheritance

System.Object

FDFDoc

Namespace: pdftron.FDF

Assembly: PDFNetDotNetCore.dll

Syntax

public class FDFDoc : IDisposable

Constructors

FDFDoc()

Default constructor. Creates an empty FDF document.

Declaration

public FDFDoc()

FDFDoc(FDFDoc)

Declaration

public FDFDoc(FDFDoc other)

Parameters

Type	Name	Description
FDFDoc	other

FDFDoc(Filter)

Open an existing FDF document from an InputStream.

Declaration

public FDFDoc(Filter stream)

Parameters

Type	Name	Description
Filter	stream	input stream containing a serialized document.

Remarks

Make sure to call InitSecurityHandler() after FDFDoc(...) for encrypted documents.

FDFDoc(SDFDoc)

Create a FDF document from an existing SDF/Cos document.

Declaration

public FDFDoc(SDFDoc sdfdoc)

Parameters

Type	Name	Description
SDFDoc	sdfdoc	An SDF document. Created FDFDoc will take the ownership of the low-level document.

FDFDoc(Byte[], Int32)

Open an existing FDF document from an InputStream.

Declaration

public FDFDoc(byte[] buf, int buf_size)

Parameters

Type	Name	Description
System.Byte[]	buf	input stream containing a serialized document.
System.Int32	buf_size	the expected size of the input stream.

Remarks

Make sure to call InitSecurityHandler() after FDFDoc(...) for encrypted documents.

FDFDoc(String)

Create a new FDFDoc from XFDF input. Input can be either a XFDF file path, or the XFDF data itself.

Declaration

public FDFDoc(string xfdf)

Parameters

Type	Name	Description
System.String	xfdf	string containing either the file path to a XFDF file, or the XML buffer containing the XFDF.

Methods

Close()

Close FDFDoc and release associated resources

Declaration

public void Close()

CreateFromXFDF(String)

Create a new FDFDoc from XFDF input. Input can be either a XFDF file path, or the XFDF data itself.

Declaration

public static FDFDoc CreateFromXFDF(string xfdf)

Parameters

Type	Name	Description
System.String	xfdf	string containing either the file path to a XFDF file, or the XML buffer containing the XFDF.

Returns

Type	Description
FDFDoc	created FDFDoc

Destroy()

Declaration

public void Destroy()

Dispose()

Declaration

public void Dispose()

Dispose(Boolean)

Declaration

protected void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing

FieldCreate(String, Int32)

Create a new interactive form FDFField.

Declaration

public FDFField FieldCreate(string field_name, int type)

Parameters

Type	Name	Description
System.String	field_name	the field_name
System.Int32	type	the field_type

Returns

Type	Description
FDFField	the fDF field

FieldCreate(String, Int32, Obj)

Create a FDFField with specified name, type and string value

Declaration

public FDFField FieldCreate(string field_name, int type, Obj field_value)

Parameters

Type	Name	Description
System.String	field_name	the field_name
System.Int32	type	the field_type
Obj	field_value	the field_value

Returns

Type	Description
FDFField	the FDF field

FieldCreate(String, Int32, String)

Create a FDFField with specified name, type and value

Declaration

public FDFField FieldCreate(string field_name, int type, string field_value)

Parameters

Type	Name	Description
System.String	field_name	the field_name
System.Int32	type	the field_type
System.String	field_value	the field_value

Returns

Type	Description
FDFField	the FDF field

Finalize()

Releases all resources used by the FDFDoc

Declaration

protected void Finalize()

GetFDF()

Get the FDF dictionary.

Declaration

public Obj GetFDF()

Returns

Type	Description
Obj	the FDF dictionary located in "/Root" or NULL if dictionary is not present.

GetField(String)

field_name a string representing the fully qualified name of the field (e.g. "employee.name.first").

Declaration

public FDFField GetField(string field_name)

Parameters

Type	Name	Description
System.String	field_name	the field_name

Returns

Type	Description
FDFField	a FDFFieldIterator referring to the given interactive FDFField or if the field name was not found HasNext() will return false.

GetFieldIterator()

An interactive form (sometimes referred to as an AcroForm) is a collection of fields for gathering information interactively from the user. A FDF document may contain any number of fields appearing on any combination of pages, all of which make up a single, global interactive form spanning the entire document.

The following methods are used to access and manipulate Interactive form fields (sometimes referred to as AcroForms).

Declaration

public FDFFieldIterator GetFieldIterator()

Returns

Type	Description
FDFFieldIterator	an iterator to the first Filed in the document.

Remarks

if the document has no AcroForms, HasNext()

GetFieldIterator(String)

Get the field iterator.

Declaration

public FDFFieldIterator GetFieldIterator(string field_name)

Parameters

Type	Name	Description
System.String	field_name	the field_name

Returns

Type	Description
FDFFieldIterator	the field iterator

GetID()

Get the ID entry from "/Root/FDF" dictionary.

Declaration

public Obj GetID()

Returns

Type	Description
Obj	An object representing the ID entry in "/Root/FDF" dictionary.

GetPdfFileName()

Get the PDF document file that this FDF file was exported from or is intended to be imported into.

Declaration

public string GetPdfFileName()

Returns

Type	Description
System.String	a String with the PDF document file name.

GetRoot()

Get the root.

Declaration

public Obj GetRoot()

Returns

Type	Description
Obj	A dictionary representing the Cos root of the document (/Root entry within the trailer dictionary)

GetSDFDoc()

Get the SDFDoc object in FDFDoc

Declaration

public SDFDoc GetSDFDoc()

Returns

Type	Description
SDFDoc	document's SDF/Cos document

GetTrailer()

Get the trailer.

Declaration

public Obj GetTrailer()

Returns

Type	Description
Obj	A dictionary representing the Cos root of the document (document's trailer)

IsModified()

determine whether the document is modified

Declaration

public bool IsModified()

Returns

Type	Description
System.Boolean	true if document was modified, false otherwise

MergeAnnots(String)

Merge annotations into FDF document from an XML command.

Declaration

public void MergeAnnots(string command_file)

Parameters

Type	Name	Description
System.String	command_file	the path to XML command file, or the XML command itself

MergeAnnots(String, String)

Merge annotations into FDF document from an XML command.

Declaration

public void MergeAnnots(string command_file, string permitted_user)

Parameters

Type	Name	Description
System.String	command_file	the path to XML command file, or the XML command itself
System.String	permitted_user	the user name of the permitted user

Save()

Declaration

public byte[] Save()

Returns

Type	Description
System.Byte[]

Save(String)

Saves the document to a file.

If a full save is requested to the original path, the file is saved to a file system-determined temporary file, the old file is deleted, and the temporary file is renamed to path.

A full save with remove unused or linearization option may re-arrange object in the cross reference table. Therefore all pointers and references to document objects and resources should be re acquired in order to continue document editing.

In order to use incremental save the specified path must match original path and e_incremental flag bit should be set.

Declaration

public void Save(string path)

Parameters

Type	Name	Description
System.String	path	The full path name to which the file is saved.

SaveAsXFDF()

Save a FDF document into a XFDF string.

Declaration

public string SaveAsXFDF()

Returns

Type	Description
System.String	String containing the XFDF representation of the FDF document

SaveAsXFDF(String)

Save a FDF document in XFDF format.

Declaration

public void SaveAsXFDF(string file_name)

Parameters

Type	Name	Description
System.String	file_name	the path

SetID(Obj)

Set the ID entry in "/Root/FDF" dictionary.

Declaration

public void SetID(Obj id)

Parameters

Type	Name	Description
Obj	id	ID array object.

SetPdfFileName(String)

Set the PDF document file that this FDF file was exported from or is intended to be imported into.

Declaration

public void SetPdfFileName(string filepath)

Parameters

Type	Name	Description
System.String	filepath	pathname to the file.