试试下面的代码:

 New WebDriverWait(driver, TimeSpan.FromSeconds(10)).Until(Function(d) d.FindElement(By.Id("controlName")).Displayed)

在Selenium IDE中选择Webdriver格式时，clickAndWait命令不会转换。这里有一个变通办法。添加下面的等候线。实际上，问题是在我的c#代码中的一行1之前发生的单击或事件。但实际上，只要确保在引用By对象的任何操作之前都有一个WaitForElement。

HTML代码:

<a href="http://www.google.com">xxxxx</a>

c# / NUnit代码:

driver.FindElement(By.LinkText("z")).Click;
driver.WaitForElement(By.LinkText("xxxxx"));
driver.FindElement(By.LinkText("xxxxx")).Click();

// Wait up to 5 seconds with no minimum for a UI element to be found
WebDriverWait wait = new WebDriverWait(_pagedriver, TimeSpan.FromSeconds(5));
IWebElement title = wait.Until<IWebElement>((d) =>
{
    return d.FindElement(By.ClassName("MainContentHeader"));
});

我们可以这样实现:

public static IWebElement WaitForObject(IWebDriver DriverObj, By by, int TimeOut = 30)
{
    try
    {
        WebDriverWait Wait1 = new WebDriverWait(DriverObj, TimeSpan.FromSeconds(TimeOut));
        var WaitS = Wait1.Until(SeleniumExtras.WaitHelpers.ExpectedConditions.PresenceOfAllElementsLocatedBy(by));
        return WaitS[0];
    }
    catch (NoSuchElementException)
    {
        Reports.TestStep("Wait for Element(s) with xPath was failed in current context page.");
        throw;
    }
}

这是一个可重用的函数，用于使用显式等待等待DOM中出现的元素。

public void WaitForElement(IWebElement element, int timeout = 2)
{
    WebDriverWait wait = new WebDriverWait(webDriver, TimeSpan.FromMinutes(timeout));
    wait.IgnoreExceptionTypes(typeof(NoSuchElementException));
    wait.IgnoreExceptionTypes(typeof(StaleElementReferenceException));
    wait.Until<bool>(driver =>
    {
        try
        {
            return element.Displayed;
        }
        catch (Exception)
        {
            return false;
        }
    });
}

 new WebDriverWait(driver, TimeSpan.FromSeconds(10)).
   Until(ExpectedConditions.PresenceOfAllElementsLocatedBy((By.Id("toast-container"))));