Export Data To A File?

in my forms i want to provide a button which can create a file with textbox data, combobox , data grid view, etc ( file can be of any form XML, Csv, Excel etc (just to email it normally ) on the other hand when we download it, its value can be restored in the form and with onther button can be saved normally as we save using access database)now any one please guide me how to create csv in a specific folder using data from form which includes different box and one datagridview.what will be helpful if normal data can be saved in one worksheet and datagridview in other worksheet. And can be imported again from the same view to form.