FileUpload Control
This is a better implementation of the file uploading control. It has
all the functionality of the built-in FileUpload control, but adds a AutoPostBack and Accept properties,
as well as a FileReceived event.
Here's an example of the tag used for the FileUpload control.
<mb:FileUpload runat="server" id="FileUp" OnFileReceived="FileUp_FileReceived" />