有没有很好的示例，说明如何使用Selenium Webdriver C＃截屏，然后裁剪并保存图像？ [英] Are there any good examples of how to take a screenshot in selenium webdriver C#, then crop and save the image?

问题描述

我一直在寻找一些很好的示例，这些示例如何使用C＃的Selenium Webdriver中的ITakesScreenshot截屏，然后使用元素尺寸裁剪图像，然后保存该新图像。运气不好，我没有在C＃中找到任何东西。

I've been searching for some good examples of how to take a screenshot using ITakesScreenshot in Selenium Webdriver in C#, then to crop the image using the elements dimensions and then saving this new image. With no such luck have I found any in C#.

目前我有此方法，但是在测试中使用时，经常会遇到内存不足异常。

I have this method at the moment but every so often I get a Out of Memory exception when used in a test. It fails on the line where it tries to crop.

public void TakeScreenShotOfElement(IWebDriver _driver, string rootpath, string imgName, string element2)
    {

            string element3 = element2;
            var element = driver.FindElement(By.XPath(element3));
            Byte[] ba = ((ITakesScreenshot)driver).GetScreenshot().AsByteArray;
            var ss = new Bitmap(new MemoryStream(ba));

            var crop = new Rectangle(element.Location.X, element.Location.Y, element.Size.Width, element.Size.Height);

            //create a new image by cropping the original screenshot
            Bitmap image2 = ss.Clone(crop, ss.PixelFormat);


            if (!Directory.Exists(rootpath))
            {
                Directory.CreateDirectory(rootpath);
            }
            image2.Save(String.Format("{0}\\{1}.png", rootpath, imgName), System.Drawing.Imaging.ImageFormat.Png);

    }

感谢任何帮助，在此先感谢！！！

Any help is much appreciated, thanks in advance!!!

推荐答案

您正在创建的某些对象是 IDisposable 。您需要确保在它们上调用 Dispose（）。从目前的情况来看，他们没有释放他们所声称的内存，这就是为什么您会得到例外。

Some of the objects you're creating are IDisposable. You need to make sure Dispose() gets called on them. As it stands they're not releasing the memory they've claimed, which is why you get the exceptions.

确保清除这些物品的最简单方法是：将它们每个都包装在 using 块中。

The easiest way to make sure these items get disposed is to wrap each of them in a using block.

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