Display bytes as images on an .aspx page

I’m using a database to store clients’ images as bytes. How can I render these images on an .aspx page?

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Answers:

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Method 1

Two solutions.

Build a handler page. That takes an ImageID/RowID as GET parameter and returns data with mimetype image/jpeg or image/png.
Use DATA uri scheme as explained on wikipedia.
<img src=”data:image/png;base64,
iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAABGdBTUEAALGP
C/xhBQAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9YGARc5KB0XV+IA
AAAddEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIFRoZSBHSU1Q72QlbgAAAF1J
REFUGNO9zL0NglAAxPEfdLTs4BZM4DIO4C7OwQg2JoQ9LE1exdlYvBBeZ7jq
ch9//q1uH4TLzw4d6+ErXMMcXuHWxId3KOETnnXXV6MJpcq2MLaI97CER3N0
vr4MkhoXe0rZigAAAABJRU5ErkJggg==” alt=”Red dot” />

Method 2

Instructions can be found here: http://www.dotnetcurry.com/ShowArticle.aspx?ID=129&AspxAutoDetectCookieSupport=1

in step 4, but the whole article is worth a read.

Method 3

This can be done easily by converting the Byte Array to a Base64 image.

public string GetImageAsBase64String(byte[] bin)
{
    if (bin != null)
    {
        return "<img src="data:image/jpeg;base64," + Convert.ToBase64String(bin) + "">";
    }
    else
    {
       return null;
    }
}

//usage, for demo purposes an uploaded image from a FileUpload Control
Label1.Text = GetImageAsBase64String(FileUpload1.FileBytes);

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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