Recommended way to check file size on upload

Question

I am working on a web application which supports file uploading. I am already familiar checking the size in server side, but i wanted to check the file size in a client side.

Answer 1

I actually asked this very question (more or less) a few days ago and the general answer seems to be: It can't be done.

For reference: Ensure file size of uploaded file is lower than maxRequestLength before the upload occurs?