Getting the size of a file to be uploaded

[jfrost10]

Hey guys,

Is there a way in javascript to figure out the size of a file selected with an html file upload control?

right now, the file needs to be posted to the server before our server side code can be checked. It would be great to be able to check it on the client and limit the uploads from there.

Thanks,

Jack

 

[dfrankel]

Jack,
there is no way of getting the file size of a file you are trying to upload from a PC before it actually gets uploaded. The document.fileSize atribute only works with IE4.0 and higher and only works if the file has already been loaded in the html page.
Dan

 

[mwolf00]

If you are handling the upload with an application like aspUpload the program will give you a method to determine file size before uploading (and limit maxmimum upload size) -----------------------------------------------------------------
Be nice. It's only doing what you tell it to do.
mikewolf@tst-us.com

 

[jfrost10]

Thanks guys. Unfortunately, we aren't using any program (just the html file upload control).

So how do some of the free services out there handle it when a large file is uploaded (i.e. > 10 MB)?!

Sure the server might not save it, but that still could be huge bandwidth loss while its being sent!

Thats really what we're trying to avoid: we have a VPN and limited bandwidth, and we don't want our clients uploading huge CAD files if we can avoid it, especially since they won't end up getting saved anyway.

Thanks,

jack