ブラウザーの高さの変更が常に機能するとは限りません。これは私が使用したソリューションです。ページをスクロールして、ページ全体のスクリーンショットを作成します。
public static Image TakeFullPageScreenshot(this RemoteWebDriver driver, int maxHeight = 10000)
{
Bitmap fullPageScreenshot = null;
using (var fullMs = new MemoryStream((driver.GetScreenshot()).AsByteArray)) {
fullPageScreenshot = Image.FromStream(fullMs) as Bitmap;
}
var originalPageOffset = driver.GetPageOffset();
var prevPageOffset = 0;
var currentPageOffset = 0;
var scrollLength = (int)(driver.Manage().Window.Size.Height / 1.5);
while (fullPageScreenshot.Height < maxHeight)
{
prevPageOffset = driver.GetPageOffset().Y;
driver.ScrollPageBy(0, scrollLength);
System.Threading.Thread.Sleep(500);
currentPageOffset = driver.GetPageOffset().Y;
if (prevPageOffset == currentPageOffset)
{
break;
}
var pageMovedBy = currentPageOffset - prevPageOffset;
using (var ms = new MemoryStream(driver.GetScreenshot().AsByteArray))
{
using (var viewPortScreenshot = Image.FromStream(ms) as Bitmap)
{
var croppedScreenshot = CropBitmapAtRect(viewPortScreenshot, new Rectangle(0, viewPortScreenshot.Height - pageMovedBy, viewPortScreenshot.Width, pageMovedBy));
var newFullPage = AppendBitmap(fullPageScreenshot, croppedScreenshot);
fullPageScreenshot.Dispose();
fullPageScreenshot = newFullPage;
}
}
}
driver.ScrollPageTo(originalPageOffset.X, originalPageOffset.Y);
return fullPageScreenshot;
}
public static Bitmap CropBitmapAtRect(Bitmap b, Rectangle r)
{
Bitmap nb = new Bitmap(r.Width, r.Height);
using (Graphics g = Graphics.FromImage(nb))
{
g.DrawImage(b, -r.X, -r.Y);
return nb;
}
}
public static Bitmap AppendBitmap(Bitmap source, Bitmap target, int spacing = 0)
{
int w = Math.Max(source.Width, target.Width);
int h = source.Height + target.Height + spacing;
Bitmap bmp = new Bitmap(w, h);
using (Graphics g = Graphics.FromImage(bmp))
{
g.DrawImage(source, 0, 0);
g.DrawImage(target, 0, source.Height + spacing);
}
return bmp;
}
public static void ScrollPageBy(this RemoteWebDriver driver, int x = 0, int y = 0)
{
driver.ExecuteScript(@"window.scroll(window.pageXOffset + arguments[0], window.pageYOffset + arguments[1]);", x, y);
}
public static void ScrollPageTo(this RemoteWebDriver driver, int x = 0, int y = 0)
{
driver.ExecuteScript(@"window.scroll(arguments[0], arguments[1]);", x, y);
}
public static Point GetPageOffset(this RemoteWebDriver driver)
{
var offsetArray = driver.ExecuteScript(@"return [window.pageXOffset, window.pageYOffset];") as ReadOnlyCollection<object>;
var x = (long)offsetArray[0];
var y = (long)offsetArray[1];
return new Point((int)x, (int)y);
}