从字节找出一个形象的的ContentType [] [英] Finding out the ContentType of a Image from the byte[]

问题描述

有没有办法找出图像的contentType为只从原始字节？

Is there a way to find out what the ContentType of an image is from only the original bytes?

目前我只存储字节[]，这是我用它来显示网页上的图像的数据库列。

At the moment I have a database column that stores only the byte[], which I use to display an image on a web page.

MemoryStream ms = new MemoryStream(imageBytes);
Image image = Image.FromStream(ms);
image.Save(context.HttpContext.Response.OutputStream, <--ContentType-->);

我当然可以只保存的ContentType在表中的另一列，但如果有另一种方式例如只是想知道也许净有一种方式来询问数据获取的类型。

I could of course just save the ContentType in another column in the table, but just wondered if there was another way e.g. maybe .Net has a way to interrogate the data to get the type.

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