在 C# 中使用 Selenium 通过部分 id 查找元素
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Finding an element by partial id with Selenium in C#
提问by Michael Howell
I am trying to locate an element with a dynamically generated id. The last part of the string is constant ("ReportViewer_fixedTable"), so I can use that to locate the element. I have tried to use regex in XPath:
我正在尝试使用动态生成的 id 定位元素。字符串的最后一部分是常量（“ReportViewer_fixedTable”），因此我可以使用它来定位元素。我曾尝试在 XPath 中使用正则表达式：
targetElement = driver.FindElement(
By.XPath("//table[regx:match(@id, "ReportViewer_fixedTable")]"));
And locating by CssSelector:
并通过 CssSelector 定位：
targetElement = driver.FindElement(
By.CssSelector("table[id$='ReportViewer_fixedTable']"));
Neither works. Any suggestions would be appreciated.
两者都不起作用。任何建议，将不胜感激。
采纳答案by Greg
That is because the css selector needs to be modified you were almost there...
那是因为 css 选择器需要修改你几乎就在那里......
driver.FindElement(By.CssSelector("table[id*='ReportViewer_fixedTable']"))`
From https://saucelabs.com/blog/selenium-tips-css-selectors-in-selenium-demystified:
来自https://saucelabs.com/blog/selenium-tips-css-selectors-in-selenium-demystified：
css=a[id^='id_prefix_']
A link with an idthat starts with the text id_prefix_.
id以文本开头的链接id_prefix_。
css=a[id$='_id_sufix']
A link with an idthat ends with the text _id_sufix.
id以文本 结尾的链接_id_sufix。
css=a[id*='id_pattern']
A link with an idthat contains the text id_pattern.
带有id包含文本 的链接id_pattern。
You were using a suffix which I'm assuming was not the partial link text identifier you were supposed to be using (unless I saw your html, which means try showing your html next time). *=is reliable in any situation though.
您使用的后缀我假设不是您应该使用的部分链接文本标识符（除非我看到了您的 html，这意味着下次尝试显示您的 html）。*=不过在任何情况下都是可靠的。
回答by Prashant Shukla
try using
尝试使用
targetElement = driver.FindElement(By.XPath("//table[contains(@id, "ReportViewer_fixedTable")]"));
Note this will check for all the elements that have id which contains (and not only ends with 'ReportViewer_fixedTable'). I will try to find a regex option that would be more accurate answer to you question.
请注意，这将检查所有包含 id 的元素（并且不仅以“ReportViewer_fixedTable”结尾）。我将尝试找到一个正则表达式选项，可以更准确地回答您的问题。
回答by iSunilSV
This solution will work irrespective of the XPath version. First, create a method somewhere in your COMMON helper class.
无论 XPath 版本如何，此解决方案都将起作用。首先，在您的 COMMON 帮助器类中的某处创建一个方法。
public static string GetXpathStringForIdEndsWith(string endStringOfControlId)
{
return "//*[substring(@id, string-length(@id)- string-length(\"" + endStringOfControlId + "\") + 1 )=\"" + endStringOfControlId + "\"]";
}
In my case, below is the control ID in different version of my product ::
就我而言，以下是我产品不同版本中的控件 ID ::
v1.0 :: ContentPlaceHolderDefault_MasterPlaceholder_HomeLoggedOut_7_hylHomeLoginCreateUser
v1.0 :: ContentPlaceHolderDefault_MasterPlaceholder_HomeLoggedOut_7_hylHomeLoginCreateUser
v2.0 :: ContentPlaceHolderDefault_MasterPlaceholder_HomeLoggedOut_8_hylHomeLoginCreateUser
v2.0 :: ContentPlaceHolderDefault_MasterPlaceholder_HomeLoggedOut_8_hylHomeLoginCreateUser
Then, you can call the above method to find the control which has static end string.
然后，您可以调用上述方法来查找具有静态结束字符串的控件。
By.XPath(Common.GetXpathStringForIdEndsWith("<End String of the Control Id>"))
For the control ID's which I mentioned for v1 & v2, I use like below :
对于我在 v1 和 v2 中提到的控件 ID，我使用如下：
By.XPath(Common.GetXpathStringForIdEndsWith("hylHomeLoginCreateUser"))
The overall logic is that, you can use the below XPath expression to find a control which ends with particular string:
总体逻辑是，您可以使用以下 XPath 表达式来查找以特定字符串结尾的控件：
//*[substring(@id, string-length(@id)- string-length("<EndString>") + 1 )="<EndString>"]
