Selenium WebDriver C# Full Website Screenshots With ChromeDriver and FirefoxDriver

we can't get the entire page screenshot with ChromeDriver2, we need to go for manual implementation.I have modified a method with is available in a blog which works fine with ChromeDriver.

use this method as following :

private IWebDriver _driver = new ChromeDriver(CHROME_DRIVER_PATH);screenshot.SaveAsFile(saveFileName, ImageFormat.Jpeg);public Bitmap GetEntereScreenshot()    {        Bitmap stitchedImage = null;        try        {            long totalwidth1 = (long)((IJavaScriptExecutor)_driver).ExecuteScript("return document.body.offsetWidth");//documentElement.scrollWidth");            long totalHeight1 = (long)((IJavaScriptExecutor)_driver).ExecuteScript("return  document.body.parentNode.scrollHeight");            int totalWidth = (int)totalwidth1;            int totalHeight = (int)totalHeight1;            // Get the Size of the Viewport            long viewportWidth1 = (long)((IJavaScriptExecutor)_driver).ExecuteScript("return document.body.clientWidth");//documentElement.scrollWidth");            long viewportHeight1 = (long)((IJavaScriptExecutor)_driver).ExecuteScript("return window.innerHeight");//documentElement.scrollWidth");            int viewportWidth = (int)viewportWidth1;            int viewportHeight = (int)viewportHeight1;        // Split the Screen in multiple Rectangles        List<Rectangle> rectangles = new List<Rectangle>();        // Loop until the Total Height is reached        for (int i = 0; i < totalHeight; i += viewportHeight)        {            int newHeight = viewportHeight;            // Fix if the Height of the Element is too big            if (i + viewportHeight > totalHeight)            {                newHeight = totalHeight - i;            }            // Loop until the Total Width is reached            for (int ii = 0; ii < totalWidth; ii += viewportWidth)            {                int newWidth = viewportWidth;                // Fix if the Width of the Element is too big                if (ii + viewportWidth > totalWidth)                {                    newWidth = totalWidth - ii;                }                // Create and add the Rectangle                Rectangle currRect = new Rectangle(ii, i, newWidth, newHeight);                rectangles.Add(currRect);            }        }        // Build the Image        stitchedImage = new Bitmap(totalWidth, totalHeight);        // Get all Screenshots and stitch them together        Rectangle previous = Rectangle.Empty;        foreach (var rectangle in rectangles)        {            // Calculate the Scrolling (if needed)            if (previous != Rectangle.Empty)            {                int xDiff = rectangle.Right - previous.Right;                int yDiff = rectangle.Bottom - previous.Bottom;                // Scroll                //selenium.RunScript(String.Format("window.scrollBy({0}, {1})", xDiff, yDiff));                ((IJavaScriptExecutor)_driver).ExecuteScript(String.Format("window.scrollBy({0}, {1})", xDiff, yDiff));                System.Threading.Thread.Sleep(200);            }            // Take Screenshot            var screenshot = ((ITakesScreenshot)_driver).GetScreenshot();            // Build an Image out of the Screenshot            Image screenshotImage;            using (MemoryStream memStream = new MemoryStream(screenshot.AsByteArray))            {                screenshotImage = Image.FromStream(memStream);            }            // Calculate the Source Rectangle            Rectangle sourceRectangle = new Rectangle(viewportWidth - rectangle.Width, viewportHeight - rectangle.Height, rectangle.Width, rectangle.Height);            // Copy the Image            using (Graphics g = Graphics.FromImage(stitchedImage))            {                g.DrawImage(screenshotImage, rectangle, sourceRectangle, GraphicsUnit.Pixel);            }            // Set the Previous Rectangle            previous = rectangle;        }        }        catch (Exception ex)        {            // handle        }        return stitchedImage;    }

I cleaned up @Selvantharajah Roshanth's answer and added a check so that it won't try to stitch together screenshots that already fit in the viewport.

public Image GetEntireScreenshot(){    // Get the total size of the page    var totalWidth = (int) (long) ((IJavaScriptExecutor) driver).ExecuteScript("return document.body.offsetWidth"); //documentElement.scrollWidth");    var totalHeight = (int) (long) ((IJavaScriptExecutor) driver).ExecuteScript("return  document.body.parentNode.scrollHeight");    // Get the size of the viewport    var viewportWidth = (int) (long) ((IJavaScriptExecutor) driver).ExecuteScript("return document.body.clientWidth"); //documentElement.scrollWidth");    var viewportHeight = (int) (long) ((IJavaScriptExecutor) driver).ExecuteScript("return window.innerHeight"); //documentElement.scrollWidth");    // We only care about taking multiple images together if it doesn't already fit    if (totalWidth <= viewportWidth && totalHeight <= viewportHeight)    {        var screenshot = driver.TakeScreenshot();        return ScreenshotToImage(screenshot);    }    // Split the screen in multiple Rectangles    var rectangles = new List<Rectangle>();    // Loop until the totalHeight is reached    for (var y = 0; y < totalHeight; y += viewportHeight)    {        var newHeight = viewportHeight;        // Fix if the height of the element is too big        if (y + viewportHeight > totalHeight)        {            newHeight = totalHeight - y;        }        // Loop until the totalWidth is reached        for (var x = 0; x < totalWidth; x += viewportWidth)        {            var newWidth = viewportWidth;            // Fix if the Width of the Element is too big            if (x + viewportWidth > totalWidth)            {                newWidth = totalWidth - x;            }            // Create and add the Rectangle            var currRect = new Rectangle(x, y, newWidth, newHeight);            rectangles.Add(currRect);        }    }    // Build the Image    var stitchedImage = new Bitmap(totalWidth, totalHeight);    // Get all Screenshots and stitch them together    var previous = Rectangle.Empty;    foreach (var rectangle in rectangles)    {        // Calculate the scrolling (if needed)        if (previous != Rectangle.Empty)        {            var xDiff = rectangle.Right - previous.Right;            var yDiff = rectangle.Bottom - previous.Bottom;            // Scroll            ((IJavaScriptExecutor) driver).ExecuteScript(String.Format("window.scrollBy({0}, {1})", xDiff, yDiff));        }        // Take Screenshot        var screenshot = driver.TakeScreenshot();        // Build an Image out of the Screenshot        var screenshotImage = ScreenshotToImage(screenshot);        // Calculate the source Rectangle        var sourceRectangle = new Rectangle(viewportWidth - rectangle.Width, viewportHeight - rectangle.Height, rectangle.Width, rectangle.Height);        // Copy the Image        using (var graphics = Graphics.FromImage(stitchedImage))        {            graphics.DrawImage(screenshotImage, rectangle, sourceRectangle, GraphicsUnit.Pixel);        }        // Set the Previous Rectangle        previous = rectangle;    }    return stitchedImage;}private static Image ScreenshotToImage(Screenshot screenshot){    Image screenshotImage;    using (var memStream = new MemoryStream(screenshot.AsByteArray))    {        screenshotImage = Image.FromStream(memStream);    }    return screenshotImage;}

It appears as though full-screen screenshots are not yet implemented in the ChromeDriver, due to some inaccuracies in its previous implementation.

Source: https://code.google.com/p/chromedriver/issues/detail?id=294

I have recently written a Selenium based application to test an Internet Explorer UI and found that:

1. Taking screenshots with selenium was not as quick as using .NET, and
2. Selenium is unable to take screenshots when dialog boxes are present. This was a major drawback, as I needed to identify unexpected dialogs during interaction with the pages.

Investigate using the Graphics.CopyFromScreen method in System.Drawing as an alternative solution until the feature is implemented in Chrome. Once you have tried .the Net approach however, I don't think you will look back =]