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PdfExternalObject Class

An external object (commonly called an XObject) is a graphics object whose contents are defined by a self-contained stream, separate from the content stream in which it is used. There are three types of external objects:

  • An image XObject (8.9.5, "Image Dictionaries") represents a sampled visual image such as a photograph.
  • A form XObject (8.10, "Form XObjects") is a self-contained description of an arbitrary sequence of graphics objects.
  • A PostScript XObject (8.8.2, "PostScript XObjects") contains a fragment of code expressed in the PostScript page description language. PostScript XObjects should not be used.
Inheritance Hierarchy
SystemObject
  SautinSoft.PdfPdfObject
    SautinSoft.Pdf.ContentPdfContentResource
      SautinSoft.Pdf.ContentPdfExternalObject
        SautinSoft.Pdf.ContentPdfForm
        SautinSoft.Pdf.ContentPdfImage

Namespace: SautinSoft.Pdf.Content
Assembly: SautinSoft.Pdf (in SautinSoft.Pdf.dll) Version: 2025.11.10
Syntax
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public abstract class PdfExternalObject : PdfContentResource

The PdfExternalObject type exposes the following members.

Properties
 NameDescription
Public propertyAssociatedFiles(Optional; PDF 2.0) An array of one or more PdfFileSpecifications which denote the associated files for this PdfImage or PdfForm.
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Extension Methods
 NameDescription
Public Extension MethodGetArray Gets the PdfArray that serves as a backing storage of the specified PdfObject or if no PdfArray serves as a backing storage of the specified PdfObject.
(Defined by PdfObjectExtensions)
Public Extension MethodGetDictionary Gets the PdfDictionary that serves as a backing storage of the specified PdfObject.
(Defined by PdfObjectExtensions)
Public Extension MethodGetOrAddDictionary Gets the PdfDictionary that serves as a backing storage of the specified PdfObject.
(Defined by PdfObjectExtensions)
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See Also