How to check an input type="file" has a file or not using jquery?

Question

I have a file upload control <input id="File1" type="file" /> in my page... How to check an input type="file" has a file or not using jquery on click of a button upload?

Answer 1

if (jQuery('#File1').val()) {}

Answer 2

$('#upload').bind('click', function(e){
   if( $('#File1').val() != ""){
       // file selected
   }
   else{
       // no file selected
   }
});

Kind Regards

--Andy