Hi, i've got the same problem than a previous topic (ie input file invalid file) that wasn't resolved.
I finally find a way to detect if the value type in a input type="file" exist on the client computer.
You only need some javascript in the onclick event of the submit button.
here an example :
try{
frmUpload.submit();
}catch(ex){
alert(errorMessage);
}
If the file doesn't exist submit throw an unauthorized access error. By catching this error you now know that the file doesn't exist or is restricted to the user.
