Question

在VS Code上，我想通过获取应用程序的屏幕快照元素来设置应用程序视觉上的UI测试。但是，当例如“ button”的元素在页面上不可见时，您需要向下滚动以查看它，创建屏幕截图时，将显示“ system of memory”错误。

这是c＃中的代码提取。

 public void TakeScreenshotOfElementCheckbox()
        {
            string fileName = @"C:\Users\...\testing\Screenshots\checkbox.png";

            var screenshotDriver = driver as ITakesScreenshot;
            Screenshot screenshot = screenshotDriver.GetScreenshot();
            var bmpScreen = new Bitmap(new MemoryStream(screenshot.AsByteArray));

            IWebElement element = driver.FindElement(By.XPath(".//*[@class='footer-convenant']"));
            var cropArea = new Rectangle(element.Location, element.Size);
            var bitmap = bmpScreen.Clone(cropArea, bmpScreen.PixelFormat);
            bitmap.Save(fileName);
       }

有关Dispose的更多详细信息：

我正在尝试，但我认为我使用了错误的方式。使用应如何使用？我可以举个例子吗？

string fileName = @"C:\Users\...\testing\Screenshots\Checkbox\checkbox.png";

            using (var image = new Bitmap(fileName))
            {
                var screenshotDriver = driver as ITakesScreenshot;
                Screenshot screenshot = screenshotDriver.GetScreenshot();
                //Bitmap bmpScreen = new Bitmap(new MemoryStream(screenshot.AsByteArray));

                // 2. Get screenshot of specific element
                element = driver.FindElement(By.XPath(".//*[@class='Checkbox']"));
                Rectangle rect = new Rectangle(element.Location, element.Size);
                var bitmap = image.Clone(rect, image.PixelFormat);
                bitmap.Save(fileName);
            }

我正在尝试，但我认为我并不遥远。您能告诉我它的结构吗？

 string fileName = @"C:\Users\...\testing\Screenshots\Checkbox\checkbox.png";

            using (var image = new Bitmap(fileName))
            {
                // 1. Make screenshot of all screen
                var screenshotDriver = driver as ITakesScreenshot;
                Screenshot screenshot = screenshotDriver.GetScreenshot();
                Bitmap bmpScreen = new Bitmap(new MemoryStream(screenshot.AsByteArray));

                // 2. Get screenshot of specific element
                element = driver.FindElement(By.XPath(".//*[@class='Checkbox']"));
                Rectangle rect = new Rectangle(element.Location, element.Size);
                using (var bitmap = image.Clone(rect, image.PixelFormat))
                {
                    bitmap.Save(fileName);
                }
            }

或

string fileName = @"C:\Users\..\testing\Screenshots\Checkbox\checkbox.png";

            using (var image = new Bitmap(fileName))

            {
                // 1. Make screenshot of all screen
                var screenshotDriver = driver as ITakesScreenshot;
                Screenshot screenshot = screenshotDriver.GetScreenshot();
                Bitmap bmpScreen = new Bitmap(new MemoryStream(screenshot.AsByteArray));

                // 2. Get screenshot of specific element
                element = driver.FindElement(By.XPath(".//*[@class='Checkbox']"));
                Rectangle rect = new Rectangle(element.Location, element.Size);
                var bitmap = bmpScreen.Clone(rect, bmpScreen.PixelFormat);
                bitmap.Save(fileName);
                bitmap.Dispose();
            }

Answer 1

Bitmap类使用需要释放的带有操作系统的非托管资源。创建位图后，您需要处置。

您创建或克隆的任何位图都需要进行处理（完成它们后）。我建议查看using statement

提供了一种方便的语法，可确保正确使用可分配对象。

如何在C＃中从内存中修复“ Clone.Bitmap”系统

1 个答案: