Get Image width & height without downloading the entire image?

[Dave]

Dear Sirs,

Is there a way to get the width and height of an image without
downloading the image, or with just downloading a minimal portion of
the image?

For instance, I have a list of 10,000 image urls, and I would like to
get the width and height of every image without spending the time and
bandwidth of downloading every image.

Thanks,
Dave

[Patrick Steele [MVP]]

In article <f3**************************@posting.google.com >,
da**@digitallint.com says...

Is there a way to get the width and height of an image without
downloading the image, or with just downloading a minimal portion of
the image?

Hmmm... Possibly. When you make a request to a website for an image, it
will stream down the entire image. I guess you could get just read
enough bytes (depending on the file format) to programatically determine
width/height and then close the stream. I'm not sure if that would
really limit network traffic, or just limit the amount of the traffic
processed by the client.

--
Patrick Steele
Microsoft .NET MVP
http://weblogs.asp.net/psteele

[Dave]

Thank you for the quick response... I think that my code will just
have to download the images until I find a better solution. Thank you
though.

Dave

Patrick Steele [MVP] <pa*****@mvps.org> wrote in message news:<MP************************@msnews.microsoft. com>...

In article <f3**************************@posting.google.com >,
da**@digitallint.com says...

Is there a way to get the width and height of an image without
downloading the image, or with just downloading a minimal portion of
the image?

Hmmm... Possibly. When you make a request to a website for an image, it
will stream down the entire image. I guess you could get just read
enough bytes (depending on the file format) to programatically determine
width/height and then close the stream. I'm not sure if that would
really limit network traffic, or just limit the amount of the traffic
processed by the client.