Selenium - 等到元素存在、可见且可交互，即使在 C# 中的可滚动模式上也是如此答案

【问题标题】：Selenium - wait until element is present, visible and interactable even on a scrollable modal in C#Selenium - 等到元素存在、可见且可交互，即使在 C# 中的可滚动模式上也是如此
【发布时间】：2021-07-01 01:22:18
【问题描述】：

这里对 python 提出了同样的问题：Selenium - wait until element is present, visible and interactable。然而，答案并未涵盖所有场景。

当我不处于调试模式时，我的实现有时会失败。我认为等待 ID 是一项微不足道的任务，应该有一个直接的 KISS 实现并且永远不会失败。

    public IWebElement WaitForId(string inputId, bool waitToInteract = false, int index = 0)
    {
        IWebElement uiElement = null;
        while (uiElement == null)
        {
            var items = WebDriver.FindElements(By.Id(inputId));
            var iteration = 0;
            while (items == null || items.Count < (index + 1) ||
                   (waitToInteract && (!items[index].Enabled || !items[index].Displayed)))
            {
                Thread.Sleep(500);
                items = WebDriver.FindElements(By.Id(inputId));
                if (items.Count == 0 && iteration == 10)
                {
                    // "still waiting...: " + inputId
                }

                if (iteration == 50)
                {
                    // "WaitForId not found: " + inputId
                    Debugger.Break(); // if tried too many times, maybe you want to investigate way
                }

                iteration++;
            }
            uiElement = WebDriver.FindElement(By.Id(inputId));
        }
        return uiElement;
    }

【问题讨论】：

“我认为等待一个 ID 是一件微不足道的任务......” - 没有什么是容易的。你能edit你的问题来描述你是如何与这个可滚动模式交互的吗？

标签： c# selenium

【解决方案1】：

    public IWebElement GetActiveElement(string id, int allowedTimeout = 20, int retryInterval = 250)
    {
      var wait = new DefaultWait<IWebDriver>(_driver)
      {
        Timeout = TimeSpan.FromSeconds(allowedTimeout),
        PollingInterval = TimeSpan.FromMilliseconds(retryInterval)
      };

      return wait.Until(d =>
      {
        var element = d.FindElement(By.Id(id));
        return element.Displayed || element.Enabled ? element : throw new NoSuchElementException();
      });

   // Usage would be something like this

GetActiveElement("foo").SendKeys("Bar");

您应该能够创建扩展方法并改为调用扩展

public static class WebDriverExtension
  {
    public static IWebElement GetActiveElement(this IWebDriver driver, string id, int allowedTimeout = 20, int retryInterval = 250)
    {
      var wait = new DefaultWait<IWebDriver>(driver)
      {
        Timeout = TimeSpan.FromSeconds(allowedTimeout),
        PollingInterval = TimeSpan.FromMilliseconds(retryInterval)
      };

      return wait.Until(d =>
      {
        var element = d.FindElement(By.Id(id));
        return element.Displayed || element.Enabled ? element : throw new NoSuchElementException();
      });
    }
  }

// usage 
_driver.GetActiveElement("foo").SendKeys("bar");

【讨论】：