The name of a file can be modified as part of the upload process by using the
onBeforeFileUploadValidate event to supply a custom file name. In this example the file name is suffixed with a numeric timestamp to ensure the uploaded file name is unique and will not overwrite an existing file. The event
onFileUploaded is also used to provide a default description based on the file name. In addition the sample also demonstrates use of the
uploadSubFolder property which allows a folder name to be stored along with the file name in the database.
