Resultant Web page to image

Hi,
I have two gridviews and a user control on my aspx page. and once I click SUBMIT button, both gridviews and user control loads some data from the database. Once I got load all these data, I want to convert this web page to an image and save it in a folder. How can I convert the resultant aspx page to image.
If I convert aspx page with the code given below:
   webBrowser.NavigateURL("http://myurl.com/mypage.aspx")
It creates image of blank MyPage.aspx, page without data. I want the image of the resultant mypage.aspx
Can anyone please help me..