Webbrowser control body innertext contains no data and inner

The webbrowser control in vs2015 successfully loads the page created by an medical imaging web application. The page can be access using the address below: The web application is a medical image viewing application with web address of: http://server-name/explore.asp?epath= ....

I am not sure but I think the content is created by an ActiveX control. Viewing the source page shows no data but the page displays data in a grid view. I want to capture the data content in the grid view table. The code below works but the content of the data grid is empty.

string browserContents = webBrowser1.DocumentText;
txtResult.Text = browserContents;

webBrowser1.Document.Body.InnerText returns empty text and webBrowser1.Document.Body.InnerText returns html with lots of java script but no data content.

Am i wasting my time in trying to get the data content when page source contains no data even though page displays data in a grid view table as displayed by the web page? I spent hours on this. Any help on this will be appreciated.