如何在c＃中获取内存中的mime类型的Image类实例？

Question

In a library I am writing for some infrastructure projects at work, I have a method to create various scales of an image (for thumbnails etc...). However, the system that I am storing this data in is requiring a mime-type declared in the database for various reasons.

Is there a way to get a Mime type from the passed in c# Image class, or will I have to have external applications pass in the Mimetype along with the image?

Answer 1

You can get the ImageFormat from the Image , and you can get the MIME type from the ImageCodecInfo . All you need to do is tie the two together:

ImageFormat format = yourImage.RawFormat;
ImageCodecInfo codec = ImageCodecInfo.GetImageDecoders().First(c => c.FormatID == format.Guid);
string mimeType = codec.MimeType;