Get content of a WebView as a string

Is it possible to get the content of a WebView as a string?

I tried using:

HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(Constants.LOGIN_URL);

HttpWebResponse response = (HttpWebResponse)await httpWebRequest.GetResponseAsync();

But I didn't get what i wanted because the webview stores the sessions etc.

I want a method to get the data of a logged in user from a website if this is possible.