You need to convert image to byte array and then you can pass it in to data table and bind with control.
for converting image to byte array
var file = File(imagePath, System.Net.Mime.MediaTypeNames.Image.Jpeg, "Image");
image = Bitmap.FromStream(file.InputStream);
MemoryStream stream = new MemoryStream();
image.Save(stream, format);
You can use stream Variable as you wish ....
context.Response.BinaryWrite(stream.ToArray());
For More help you can search it in to google and see following links
http://www.nullskull.com/q/10361859/how-to-show-image-from-local-drive-d.aspx[
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http://www.charith.gunasekara.web-sphere.co.uk/2010/09/how-to-show-selected-image-file-without.html[
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With Regards,
Manoj