Selenium无法找到元素 [英] Selenium Unable to Find Element

问题描述

我正在尝试使用Selenium在网站上找到一个元素。我正在查看的页面是：

I am trying to find an element on a website using Selenium. The page I am looking at is:

http://www.usaswimming.org/DesktopDefault.aspx?TabId=1470&Alias=Rainbow&Lang=en-US

具体来说，我试图找到姓氏输入框的元素并用Java发送密钥。对于文本框，html看起来像这样：

Specifically I am trying to find the element for the "Last Name" input box and send keys in Java. the html looks like this for the text box:

<div class="field">
<input id="ctl62_txtSearchLastName" type="text" maxlength="36" name="ctl00$ctl62$txtSearchLastName">
</div>

因此，我最初尝试通过唯一的id获取元素：

Therefore, I initially attempted to get the element through the id which is unique:

WebDriver driver = new InternetExplorerDriver();
driver.get(timeSearchSite);
...
driver.findElement(By.id("ctl62_txtSearchLastName")).sendKeys(lastName);

然而，这会产生以下错误：

However this generated the following error:

线程main中的异常org.openqa.selenium.NoSuchElementException：无法找到id == ctl62_txtSearchLastName的元素（警告：服务器未提供任何堆栈跟踪信息）

Exception in thread "main" org.openqa.selenium.NoSuchElementException: Unable to find element with id == ctl62_txtSearchLastName (WARNING: The server did not provide any stacktrace information)

我也尝试使用类似失败的名称。由于这是一个javascipt页面，我认为在尝试访问该元素之前我可能需要等待。我尝试了一个明确的和隐含的等待，两者都导致了超时。我的下一个想法是，我在错误的框架，但我似乎无法找到另一个框架。我尝试索引，因为我没有名字，但我找不到任何其他帧。在页面顶部有这可能会弄乱selenium：

I also tried to use the name which failed similarly. Since this is a javascipt page I thought that I might need to wait before trying to access the element. I tried an explicit and an implicit wait and both resulted in timeouts. My next thought was that I was in the wrong frame but I cannot seem to find another frame. I tried indexing since I don't have names but I couldn't locate any other frames. There is this at the top of the page which might be messing selenium up:

<noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-WMWM93" height="0" width="0"           
style="display: none; visibility: hidden"></iframe></noscript>

可能导致此错误的原因是什么？我如何找到元素？任何帮助将不胜感激/

What could be causing this error? How can I locate the element? Any help would be greatly appreciated/

推荐答案

使用 显式等待 为我工作（试过chrome和firefox）：

Using an explicit wait worked for me (tried both chrome and firefox):

WebDriverWait wait = new WebDriverWait(driver, 10);
WebElement element = wait.until(
    ExpectedConditions.visibilityOfElementLocated(By.id("ctl62_txtSearchLastName"))
);

element.sendKeys("test");

导致：

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