DGN

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DGN

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User Guide > File Formats and Compressions > File Formats > File Formats Reference > DGN

Full Name	MicroStation Drawing (Drawing format used by MicroStation construction design software)
Format ID	ImGearFormats.DGN
File Extension(s)	*.dgn
Data Type	Vector image
Data Encoding	Binary
Multi-Page Support	No
Alpha Channel Support	No
Metadata Update Support	No
ImageGear Platforms Support	Win32, Win64, .NET, .NET64

DGN format requires ImageGear.Formats.DGN Namespace.

ImageGear Supported Versions

DGN_VERSION_UNKNOWN
DGN_VERSION_DGN2
DGN_VERSION_DGN1_2D
DGN_VERSION_DGN1_3D
DGN_VERSION_CEL1_2D
DGN_VERSION_CEL1_3D

ImageGear Supported Features

IGFilterFormatFlags.DETECTSUPPORT - autodetection
IGFilterFormatFlags.PAGEREADSUPPORT - single page file reading

ImageGear Read Support

ImGearCompressions.NONE - Vector/CAD data

ImageGear Write Support

No

ImageGear Filter Control Parameters

Filter Control Parameter	Type	Default Value	Available Values	Description
Backcolor	Long	0	Any positive value	This parameter is used to set background color. If nBackGroundColor=0, then a black background color is set, otherwise a white background color is set.
Width	Long	512	Any positive value	Defines the DIB width of the loaded image. The DIB height is calculated using the file's scale factors.

Comments

DGN is a CAD file format used by Intergraph IGDS CAD software. It is not as commonly used as some other CAD file formats, but it has an open specification.

DGN Elements Supported for Reading

DGN Element	Supported Attributes	Imported into ImageGear as:
Shared cell definition	Cell name	ImGearVectEntities.BLOCK entity.
Shared cell instance	Cell name Transformation matrix	ImGearVectEntities.BLOCK entity that appends the shared cell definition to its container and is made current.
Shape	Points Color Line type	ImGearVectEntities.POLYLINE entity.
Cell header	Cell name	ImGearVectEntities.BLOCK entity.
Line string	Points Color Line type	ImGearVectEntities.POLYLINE entity.
Curve	Points Color Line type	ImGearVectEntities.POLYLINE entity.
B-spline surface	Order Rational flag Poles Knots Rule lines Color Line type	ImGearVectEntities.NURBS_SURFACE entity.
Text	Font Alignment Width Height Rotation Text string Color	ImGearVectEntities.TEXT entity.
Arc	Start angle End angle X Radius Y Radius Rotation Center Color Line type	ImGearVectEntities.ARC entity.
Ellipse	X Radius Y Radius Rotation Center Color Line type	ImGearVectEntities.ELLIPSE entity.
Line	Start point End point Color Line type	ImGearVectEntities.EASYLINE entity.
Group data: Named View level	Origin Matrix	Several ImGearVectorView objects.
Group data: Color table level	256 color values	Used as a palette internally.
Level symbology		ImGearVectorLayer object.

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