Selenium内置了截图方法，只能截取浏览器中显示的内容，找到一个全屏截图的方式（内置截图+控制滚动条,图片拼接）
```C# public static Bitmap GetEntereScreenshot(IWebDriver _driver) { 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; } ``` |
最后的是根据传入的元素和全屏截图，获取到价格元素的图片
```C# public static Image SnapshotV2(this IWebElement element, Bitmap bitmap) { Size size = new Size( Math.Min(element.Size.Width, bitmap.Width), Math.Min(element.Size.Height, bitmap.Height)); Rectangle crop = new Rectangle(element.Location, size); return bitmap.Clone(crop, bitmap.PixelFormat); } ``` |
运行效果如下
