Display bytes as images on an .aspx page

Question

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

Answer 1

Two solutions.

1. Build a handler page. That takes an ImageID/RowID as GET parameter and returns data with mimetype image/jpeg or image/png.

2. 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" />

Answer 2

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);