如何在 selenium C# 中获取 reCaptcha 图像

Question

当我尝试在 selenium 中获取 reCaptcha v2 图像时，我得到 no such this element 因为该元素不在主页中

那么我怎样才能在 selenium C# 中获取图片！

  _driver.Navigate().GoToUrl("https://www.google.com/recaptcha/api2/demo");

            _driver.SwitchTo().Frame(0);

            _driver.FindElement(By.Id("recaptcha-anchor")).Click();



            Thread.Sleep(5000);

            _driver.SwitchTo().Frame(0);

            //To get all images in page
            IList<IWebElement> images = _driver.FindElements(By.TagName("img"));

            MessageBox.Show(images.Count.ToString());

            string reCaptchaXpath = "";

            foreach (var img in images)
            {
                if (img.GetAttribute("src").Contains("https://www.google.com/recaptcha/api2/"))
                {
                    reCaptchaXpath = GenerateXpath(img, "");
                }
            }

Answer 1

编辑-1

下面的代码对我来说效果很好，给出了 16 张图片

        ChromeDriver _driver;
        _driver = new ChromeDriver();
        _driver.Url = "https://www.google.com/recaptcha/api2/demo";
        Thread.Sleep(5000);

        _driver.SwitchTo().Frame(_driver.FindElement(By.CssSelector("iframe[src*='recaptcha']")));

        _driver.FindElement(By.ClassName("recaptcha-checkbox-checkmark")).Click();

        Thread.Sleep(2000);
        //_driver.SwitchTo().Frame(_driver.FindElement(By.CssSelector("iframe[src*='recaptcha']")));

        _driver.SwitchTo().DefaultContent();
        _driver.SwitchTo().Frame(_driver.FindElements(By.TagName("iframe"))[1]);
        images = _driver.FindElements(By.CssSelector("img"));

        Console.WriteLine(images.Count.ToString());

原答案

您的问题是以下声明

_driver.SwitchTo().Frame(0);

您假设只有一帧。但是有多个帧

您需要使用

_driver.SwitchTo().Frame(_driver.FindElement(By.Css("iframe[src*='recaptcha']")));