How to make footer of grid view as hyperlink in sort.?

I set allowsorting of grid view to true. It works fine for header but for footer there no hyper link. It used to work in datagrid but don't know why not working for grid view.How to make footer of grid view as hyperlink in sort.?
Try this


http://msdn2.microsoft.com/en-us/library鈥?/a>