Get image size from base64 in C#

Question

How to get image size from base64 in C#?

Is it possible to do at all?

Depends entirely on what image format you're using. Please be more specific — Rob, Jan 18 '17 at 23:02
@Gigabyte You can guess the answer, sure. But it'll just be a guess, which is a problem. From the original post, the following is unknown: Why does base64 matter? (The question may be how to read a base64 into an image format). What image format are you using? What do you mean by size? Dimensions? File size? — Rob, Jan 18 '17 at 23:09

Gigabyte · Accepted Answer · 2017-01-18T23:11:34.570

11

Not directly as it depends on what data/format is encoded in the Base64 string. A rough approach would be (code not tested):

byte[] image = Convert.FromBase64String("Your Base64 string here");
using (var ms = new MemoryStream(image))
{
    Image img = Image.FromStream(ms);
    return new Tuple<int, int>(img.Width, img.Height); // or some other data container
}

Note: Image class comes from System.Drawing. See also the MSDN System.Drawing.Image class' documentation documentation.

edited Jan 18 '17 at 23:11

answered Jan 18 '17 at 23:06

Gigabyte

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What makes you think this is Dimensions and not Size? OP should know to specify dimensions not size if that's what he was after. – Jeremy Thompson Jan 18 '17 at 23:08
@JeremyThompson You're right, I was a bit too fast there. Will update accordingly. – Gigabyte Jan 18 '17 at 23:09

Get image size from base64 in C#

1 Answers1