Converting images from one format to another in C#

With C# .Net, converting images from one format to another is quick and easy. You can convert image formats from and to of any of the formats listed below.

Name Format	Description
Bmp	Gets the bitmap image format (BMP).
Emf	Gets the enhanced Windows metafile image format (EMF).
Exif	Gets the Exchangeable Image File (Exif) format.
Gif	Gets the Graphics Interchange Format (GIF) image format.
Icon	Gets the Windows icon image format.
Jpeg	Gets the Joint Photographic Experts Group (JPEG) image format.
Png	Gets the W3C Portable Network Graphics (PNG) image format.
Tiff	Gets the Tag Image File Format (TIFF) image format.
Wmf	Gets the Windows metafile (WMF) image format.

Converting images from one format to another is really just 2 line of code. (minus error checking).

Image format example.

In the following example, we are going to convert an existing image (png format) to gif format.

Bitmap bmp = new Bitmap("c:\\tmpImage.png");
//existing image.
bmp.Save("c:\\tmpImage.gif", System.Drawing.Imaging.ImageFormat.Gif);
//Saves the converted image to a file in the chosen image format.

Batch image conversion example.
In the following example, we will convert all png images in a directory to tiff images.

DirectoryInfo di = new DirectoryInfo(@"C:\images\png");
foreach (FileInfo file in di.GetFiles())
{
string imagename = Path.GetFileNameWithoutExtension(file.Name);
Bitmap bmp = new Bitmap(file.FullName);
bmp.Save(@"C:\images\tiff\\" + imagename + ".tiff", System.Drawing.Imaging.ImageFormat.Tiff, );
}

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Converting images from one format to another in C#