> When a user tries to upload a file into the depo, I'm checking to see if
> there's already a file with that name. If there IS, the offer them a choice
> to cancel, or overwrite.
>
> So, something like
>
> <cffile action="UPLOAD" filefield="doc" destination="C:\MyPart\temp\" ...
> blah />
>
> <cfif FileExists("C:\MyPart\#filetoupload#") > <!--- this works - no problem
> --->
>
> <!--- here's where I get into trouble I need to do the pseudo code below --->
>
> <!--- SHOW AN ALERT HERE: --->
> THERE'S ALREADY A FILE WITH THIS NAME. DO YOU WANT TO OVERWRITE?
> Choice NO {
> <!--- STOP PROCESSING AND RETURN TO THE ORIGINAL FORM ---> }
> Choice YES {
> <!--- UPLOAD/MOVE the file where it needs to go and overwrite the
> original ---> }
>
> <cfelse> <!--- there's not a duplicate, so do your file stuff --->
>
> <cffile action="upload" ... blah />
>
> </cfif>
>
> I've tried various javascript alerts ... but CF either keeps processing past
> the alert, or just does nothing with it... like:
>
> <script type="text/javascript">
> ! function makesure() {
> if (confirm('Overwrite?')) {
> return true;
> } else {
> alert('Deletion of this item cancelled.');
> window.location = 'test_files.cfm';
> return false;
> }
> }();
> </script>
Functions don't run automatically in JavaScript (or most other
languages). They need to be called.
But there's a more fundamental problem, as well. You won't be able to
do all of this in a single program called a single time, because CF
does all of its processing before anything is returned to the client.
So, basically, your program flow will have to look like this:
1. User runs first CF script that lets them choose a file to be uploaded.
2. User POSTs data to second CF script.
3. Second CF script returns "file already exists" message to user if
appropriate.
4. User runs third CF script to overwrite the file.
Now, of course, you can actually include all of these in one file if
you like, but there will be three CF program executions in sequence to
get where you're going.
And, of course, you could check for the existence of the file before
you upload it, via an AJAX call to yet another CF program execution.
Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
http://training.figleaf.com/
Fig Leaf Software is a Veteran-Owned Small Business (VOSB) on
GSA Schedule, and provides the highest caliber vendor-authorized
instruction at our training centers, online, or onsite.
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