Thanks for the code download support.

I’ve been build a *lot* of custom solutions for people lately, so the latest 1.2 build has evolved into a more extensible and flexible framework.. The disk caching component can be used separately, as well as the image manipulation code. And you can now set resizing defaults for folders from code, or make your own syntax.

Best Regards,
Nathanael

hehe, that’s exactly why I wrote mine - couldn’t find one that did what I wanted to. the original version (aka the version that’s still up) was a stop-gap to get something working. I revamped it for work later on, making it more robust, but didn’t take the code with me when I left (at least, I haven’t been able to find it, heh).

Truth is, I’ve been pushing your version on a couple projects lately - thanks for the link!

Cheers.

A few suggestions:
* When you cache versions, you need some checks and balances to prevent denial of service attacks. I opted for placing all cached images in a single folder, and hashing the request URL to get the filename. A configurable limit is placed on the number of cached images, and the 10% least used are deleted when that limit is reached. I also put an upper bound on the target size, so that can’t be abused.

* GetThumbnailImage is not a good method to use… It will use embedded thumbnail data from the image if available, producing inconsistent and blurry results… Use DrawImage and high-quality compositing settings instead for photoshop-level quality.

* If users upload new versions of images, the thumbnails won’t be updated. You need to set the UTC modified date on the cached versions to match the originals, and compare them to see if an update is required.

* When the image is *cached* to disk, you don’t have to read it back into memory to send it to the client - this will result in very bad performance under load. Just use WriteFile()…

* I’d recommend using using(){} around all objects that implement IDisposable… Bitmap and Image references are *not* garbage collected by .NET, so you need to make sure they are disposed if even if an exception occurs.

Hope this helps!

You can find out more about my image resizer and download it at
http://nathanaeljones.com/products/asp-net-image-resizer/

In the list of features to be added I would go with a cache timer for the generated images.

Thanks for this.

-Dylan

Is it possible to resize images with an bmp extension?

Thanks and keep up the good work!
T;

It really sucks that images don’t resize like they do in windows.

I’ve donne and utility to resize the images but it doesnt work in firefox.

This is great!

Thank you
LM

Also, check your error and IIS logs to see if you can pull a specific error message - that always speeds up the debugging process.

Last but not least…I do have some fixes/updates that I hope to roll out in the next few weeks. Not the least of which might include an upgrade to .NET 2.0 (while still supporting .NET 1.1).

I have managed to get this working on my test machine. It works great. However when uploading to my windows 2003 server it just simply dosent work. I tried setting write permission for everyone on the images directory, still no luck.

Can you advise?

Thanks
Fred.

I’ll see what I can do about it, though. I think it’s about time to update this sucka anyway.

thank you for giving a easy method for resizing picture but i have same problem.it is possible to save file without clicking save as dialog box.

shailendra
india

Alex