Is it possible to cancel file upload that uses hidden iframe?

Question

Is it possible to cancel file upload that uses hidden iframe?

I've tried to set source of iframe to empty string, but upload haven't been interrupted.

Answer 1

the iframe is the transport channel that is carrying the form posting, so Atanas is correct, you have to stop the transport inside the iframe.

here is a way of doing it depending on browser:

if (iframeObj.contentWindow.document.execCommand)
    { // IE browsers
        iframeObj.contentWindow.document.execCommand('Stop');
    }
else
    { // other browsers
        iframeObj.contentWindow.stop();
    }
// notify user upload was cancelled, remove spinner images, etc

Answer 2

Try this:

iframe.contentWindow.stop(); //for anything but IE
iframe.contentWindow.document.execCommand("Stop"); // for IE

Answer 3

Currenty setting iframe src to "javascript:false" works for me.