occassionally occuring problem

[WebRic]

Hi All,

I have a problem regarding getting the files size of an image.

Sometimes this script detects the image size other times it doesn't. I can select the same image without reloading the page and occasionaly it won't give the file size.

It's really trciky to figure out. Any advice on how to track the problem of any ways of writting the code better would be great.

		x=new Image;
		x.src=element.value;
		
		iw=x.width;
		nw=100/x.width
		ih=x.height;
		nh=nw*ih;
		is=Math.ceil(x.fileSize/1000);

		// Set row value
		new_row.innerHTML = '<img src="file:///'+element.value+'" width="100" height="'+nh+'" />';
		
		// Add the file sizes
		if(isNaN(is) != true) {
		thesize = document.getElementById('uploadSize')
		oldsize = parseInt(thesize.value,10);
		thesize.value = oldsize + is;
		document.getElementById('upload_size').innerHTML = thesize.value;
					}

Thanks,

Richard

 

[BillyRayPreachersSon]

Have a look at my FAQ, "Detecting the dimensions of an image client-side" (faq216-5781). Notice that I wait for the image to load before trying to determine any of its properties.

I'd advise going down this route with your code.

Also, you should note that the "fileSize" property is non-standard, and is probably not supported by any browser other than IE (although you'd need to test this).

Hope this helps,
Dan

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[BillyRayPreachersSon]

Richard,

Did you resolve your problem? Did the FAQ link help at all?

Dan



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[WebRic]

I've had another urgent project that needed my attention, and haven't had a chance to implement this. I'm hoping to get a chance to look at this Monday next week.

I'll let you know how I get on.
Thanks,

Richard

 

[BillyRayPreachersSon]

Ok - shout if you need anything!

Dan



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