Is google broken at your side?
Try search on
google[
^] sometimes its really good and gives more solutions quickly. See
About 2,770,000 results (0.31 seconds)
You can also try search on
CodeProject[
^] answers. Lots of similar questions are answered before and solved. Please have a look on them.
And here is one good article which I prefer:
Export GridView to Pdf-ASP.NET[
^]