Question

how can I get file size at client side using actionscript and javascript

Thanks a lot

Answer 1

What you are looking for is the FileReference class.
Upon the user ‘selecting’ the file they wish to upload, the properties of that file is populated in the FileReference instance. Then accessing it, is simply to call:
fileRef.size()

Below is a code snippet to illustrate how to use FileReference class.

var fileRef:FileReference= new FileReference();
fileRef.browse([new FileFilter("Images", "*.jpg;*.gif;*.png")]);
fileRef.addEventListener(Event.SELECT, onFileSelected);

function onFileSelected(e:Event):void 
{
    trace("Size of file is:"+fileRef.size());
}