Caching http handler .ashx output

Question

Im creating an image which has some text in it, for every customer, the image contains their name and I use the Graphics.DrawString function to create this on the fly, however I

Answer 1

The simplest solution I can think of would be to just cache the Bitmap object in the HttpContext.Cache after you've created it in the image handler.

private Bitmap GetContactImage(int contactId, HttpContext context)
{
    string cacheKey = "ContactImage#" + contactId;
    Bitmap bmp = context.Cache[cacheKey];

    if (bmp == null)
    {
         // generate your bmp
         context.Cache[cacheKey] = bmp;
    }

    return bmp;
}