export grid data to excel file

Hi,

I am using ext js3.2.1.

I have a grid which loads data from the server and have a button on top right corner of the grid "Export to Excel". If i click the button, the data loaded in grid or again from the server to be exported to EXCEL file.

Can you please give me sample or code how to export the data to excel file?

Please help.

Thanks,

sthanar