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Using Image Encoders and Decoders in Managed GDI+

The System.Drawing namespace provides the Image and Bitmap classes for storing and manipulating images. By using image encoders in GDI+, you can write images from memory to disk. By using image decoders in GDI+, you can load images from disk into memory. An encoder translates the data in an Image or Bitmap object into a designated disk file format. A decoder translates the data in a disk file to the format required by the Image and Bitmap objects.

GDI+ has built-in encoders and decoders that support the following file types:

  • BMP

  • GIF

  • JPEG

  • PNG

  • TIFF

GDI+ also has built-in decoders that support the following file types:

  • WMF

  • EMF

  • ICON

The following topics discuss encoders and decoders in more detail:

How to: List Installed Encoders

Describes how to list the encoders available on a computer.

How to: List Installed Decoders

Describes how to list the decoders available on a computer.

How to: Determine the Parameters Supported by an Encoder

Describes how to list the EncoderParameters supported by an encoder.

How to: Convert a BMP image to a PNG image

Describes how to save a image in a different image format.

How to: Set JPEG Compression Level

Describes how to change the quality level of an image.

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