Export Grid view to Word Document and save to document library programatically

Hi,

I have senario like i have created visual web part and above portion of web part has filtering criteria and filter result will shown on grid view on webpart there is option export to word file .

if i click export to word file the the word file will get created and save into the document library in sharepoint 2010. Please help me for this senario.

Thanks,

Rohit