[Javascript] Checking local file size

[Lau@goldenweb.com.au]

I tried your code but I keep getting "Error:File is undefined".

Isn't there something about it having to be a signed script or something?
Otherwise I could read every file on a clients machine when they came to my
site which I don't think should be allowed.

Peace
Lau



----- Original Message -----
From: "David T. Lovering" <dlovering at gazos.com>
To: "[JavaScript List]" <javascript at LaTech.edu>
Sent: Wednesday, April 02, 2003 12:33 PM
Subject: Re: [Javascript] Checking local file size


>
> Dear Lau:
>
>   There is no way to read the file length passively without opening it,
insofar
> as I know.  However, it is easy to find the length ONCE you've opened it
for
> reading:
>
> var myFile = new File("c:\temp\myfile.txt");
>     myFile.open("r");
>     alert('myFile length: ' + myFile.getLength());
>
>   This should work well, and you can always close the file immediately
thereafter.
>
>   -- Dave Lovering
>
> "Lau at goldenweb.com.au" wrote:
> >
> > Hi,
> >
> > I have an ASP program that lets a user upload a file (using ASPUpload).
But
> > now I want to check the size of the file before they upload it so I can
put
> > an upper limit on the size of files they can upload.
> >
> > Is there a way I can check the size of a file on the users local drive
using
> > javascript? If not what other methods are available?
> >
> > Thanks in advance
> > Lau
> >
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