FYI, the correct forums for ASP.net are http://forums.asp.net.
I'll now leave you with a general answer. Feel free to explore it further in the correct forum:
Just do the query that returns the blob field, and then query it using a SqlDataReader. You then have two options: Save it in the server as a temporary file and server the webpage that uses it pointing to this temp file, or make this a separate
ASPX page that actually returns the bits of the image. You must change the response's MIME type and do a binary response write operation. I would prefer this option.
If you need further help, post in the ASP.net forums.
MCP