Reading uploaded file

[Silvano]

Situation:
- I am programming an application in ColdFusion, where user have the possibility to upload a file; the file is image file (gif, jpg, png)

Problem I have:
- I need to know the width and the height of the uploaded image

Is there a function that can return those data?

 

[kristof]

Hi sylvano,

Don't believe there is such a function. What you could do is the following:

First, you write a hidden layer containing the image.

<div id=&quot;hiddenImage&quot; style=&quot;position:absolute;visibility:hidden&quot;>
	<img src=&quot;#image1#&quot; name=&quot;img1&quot;>
</div>

Then you call this script at onload:

<script language=&quot;JavaScript&quot;>
	if (parseInt(navigator.appVersion) >= 4) {
		if (navigator.appName == &quot;Netscape&quot;) {isNav = true;}
		else {isNav = false;}
	}

	function getDim() {
		if (!isNav) {
			img = document.all('hiddenImage');
		} else {
			img = document.layers['hiddenImage'];
		}
		w = img.document.images['img1'].width;
		h = document.images['img1'].height;
	}
</script>

Gtz,

Kristof -------------------
Check out my new site:

http://kristof.freewebspace.com/

Any suggestions are more than welcome.
There's a LOT of work to do, so judge fairly.