Best way to take screenshot of a web page

Question

What is the best way to take screenshot of a web page? At the moment I just start an selenium instance of firefox and using winapi bring it to the front and make a screenshot. I ask similar question already.

There is two points:

Slowness.
If any window occurently gets higher than our web browser's window, this window will imprint in our screenshot.

Is there any method to take screenshot more 'programmly'?

Here is some code I use now:

class FirefoxDriverEx : FirefoxDriver
{
    public Process GetFirefoxProcess()
    {
        var fi = typeof(FirefoxBinary).GetField("process", BindingFlags.NonPublic | BindingFlags.Instance);
        return fi.GetValue(this.Binary) as Process;
    }
}

Here is the code illustrating process of taking screenshot itself:

using (FirefoxDriverEx driver = new FirefoxDriverEx())
{
    driver.Navigate().GoToUrl(url);

    var process = driver.GetFirefoxProcess();

    if (process != null)
    {
        var screenCapture = new ScreenCapture();
        Win.SetForegroundWindow(process.MainWindowHandle.ToInt32());
    }
}

Right now, I'm thinking about some manager that will control a queue of windows to take the screenshots from.

Question edit.

I'm not looking for a solution to just get screenshot 'in memory' and return it back to HTTP stream. So any ways to save screenshot and save it to file and then get it from there is very ambiguous for that purpose.

Question edit #2.

I forgot to mention. Needed screenshot should be made as it seen by user. So, screenshot should have browser window and a site inside of web browser window's bounds. I can't find any way to change mode of taking a screenshot in WebDriver of selenium. WebDriver just take screenshot of a page without any browser window.

Best way to take screenshot of a web page

5 Answers