Hi Senthil,
Thank you for your continued interest in Syncfusion products.
Essential XlsIO supports read and write of Checkboxes from v7.2. Insertion of Radio button is currently not supported. You can check our online sample in the link below:
http://samples.syncfusion.com/ASPNET/7.3.0.20/web/XlsIO.Web/samples/3.5/Data%20Management/Form%20Controls/CS/default.aspxPlease let me know if you have any further questions.
Regards,
Geetha