i need export data from dataset to excel/doc through google docs api,

Thank you your response but i need through google docs api. because i need to integrate google docs to my application.

Am not sure about using google docs. But if you want convert from dataset/datatable to excel, then read my article.
http://www.c-sharpcorner.com/UploadFile/1a81c5/export-datatable-to-excel-with-formatting-in-C-Sharp/

Lacy Michelle14y ago

It is rather difficult to use google docs api. I suggest you use a free source free data export component to export your data is more easily. it also can export data to PDF,html,csv and so on