Selenium 等待元素等于某物

Question

C#、Winform、Selenium Firefox 网络驱动程序。

基本上我需要等到某个元素等于我程序中的某个元素这就是我尝试过的

public static string Watchprogress;


Watchprogress = driver.FindElement(By.XPath("//*[@id='watch-toolbar']/aside/div/span")).Text.ToString();
WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(90)).Until(Watchprogress == "3");

 //And this

 WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(90)).Until(By.XPath("//*[@id='watch-toolbar']/aside/div/span")).Text.ToString() == "3");

收到这个错误

无法从用法中推断方法 'OpenQA.Selenium.Support.UI.DefaultWait.Until(System.Func)' 的类型参数。尝试明确指定类型参数。 5079

对 selenium 还是有点陌生，所以我一直在反复试验。

Answer 1

这里有几件事。这里 Until() 的实现是错误的。您必须在此处使用 ExpectedConditions 或编写自定义函数（见下文）。请参阅 api

By byXpath = By.XPath("//*[@id='watch-toolbar']/aside/div/span");
IWebElement element =
    new WebDriverWait(_driver, TimeSpan.FromSeconds(90)).Until(ExpectedConditions.ElementExists(byXpath));


if (element.Text.Trim() == "3")
{
    //Pass this
}

LINQ 的另一个选项

string watchprogress = new WebDriverWait(_driver, new TimeSpan(10)).Until(e => e.FindElement(byXpath)).Text.Trim();

if (watchprogress == "3")
{

}

或

如果您想等到 element 得到文本 3，只需使用 bool 指标

bool watchprogress  =
                new WebDriverWait(_driver, new TimeSpan(10)).Until(e => e.FindElement(byXpath)).Text.Trim().Equals("3");

或

 IWait<IWebDriver> wait = new OpenQA.Selenium.Support.UI.WebDriverWait(driver, TimeSpan.FromSeconds(30.00));
 wait.Until(driver1 => ((IJavaScriptExecutor)driver).ExecuteScript("return document.readyState").Equals("complete"));
 //First wait for the page to be completely loaded.
 WebDriverWait wait2 = new WebDriverWait(driver, TimeSpan.FromSeconds(90));
 wait2.IgnoreExceptionTypes(typeof(StaleElementReferenceException));
 wait2.Until(d => d.FindElement(By.XPath("//*[@id='watch-toolbar']/aside/div/span")).Text.Contains("3"));

Selenium 等待元素等于某物

Selenium waiting until element equals something

c#

selenium

selenium-webdriver