如何使用 C# 通过 Selenium WebDriver 获取下拉列表中的所有选项？
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How to get all options in a drop-down list by Selenium WebDriver using C#?
提问by David Wu
I'm new to both C# and Selenium WebDriver.
我是 C# 和 Selenium WebDriver 的新手。
I know how to select/click on an option in a drop-down list, but I've a problem before that. Since the drop-down list is dynamically generated, I have to get all options/values from the list before running each case.
我知道如何选择/单击下拉列表中的选项，但在此之前我遇到了问题。由于下拉列表是动态生成的，我必须在运行每个案例之前从列表中获取所有选项/值。
Is there anyone kindly tell me how to get all values/options from a drop-down list. I'm using IE and I didn't find any class which supports method to get values/options in Selenium.IE namespace for C#.
有没有人告诉我如何从下拉列表中获取所有值/选项。我正在使用 IE，但我没有找到任何支持在 Selenium.IE 命名空间中为 C# 获取值/选项的方法的类。
My example: A list contains several time zones:
我的例子：一个列表包含几个时区：
<TD>
<select name = "time_zone">
<option value "-09:00"><script>timezone.Alaska</script></option>
<option value "+00:00"><script>timezone.England</script></option>
<option value "+02:00"><script>timezone.Greece</script></option>
<option value "+05:30"><script>timezone.India</script></option>
</select>
<TD>
This is a drop-down list in an IE page and how to get the dynamically generated time zone list?
这是一个IE页面的下拉列表，如何获取动态生成的时区列表？
My code:
我的代码：
IWebElement elem = driver.FindElement(By.XPath("//select[@name='time_zone']"));
List<IWebElement> options = elem.FindElements(By.TagName("option"));
C# just pops an Error: Cannot implicitly covert type 'OpenQA.Selenium.IWebElement' to 'System.Collections.Generic.List'. An explicit conversion exists (are you missing a cast?).
C# 只是弹出一个错误：无法将类型“OpenQA.Selenium.IWebElement”隐式转换为“System.Collections.Generic.List”。存在显式转换（您是否缺少演员表？）。
thanks.
谢谢。
回答by Jonathan McIntire
Make sure you reference the WebDriver.Support.dll assembly to gain access to the OpenQA.Selenium.Support.UI.SelectElement dropdown helper class. See this threadfor additional details.
确保您引用 WebDriver.Support.dll 程序集以访问 OpenQA.Selenium.Support.UI.SelectElement 下拉帮助程序类。有关其他详细信息，请参阅此线程。
Edit: In this screenshot, you can see that I can get the options just fine. Is IE opening up when you create a new InternetExplorerDriver?
编辑：在此屏幕截图中，您可以看到我可以很好地获得选项。创建新的 InternetExplorerDriver 时 IE 是否打开？
回答by niharika_neo
It seems to be a cast exception. Can you try converting your result to a list
i.e. elem.findElements(xx).toList?
这似乎是一个演员异常。您可以尝试将结果转换为列表elem.findElements(xx).toList吗？
回答by PocketDews
You can try using the WebDriver.Support SelectElementfound in OpenQA.Selenium.Support.UI.Selectednamespace to access the option list of a select list:
您可以尝试使用WebDriver.Support SelectElement中发现OpenQA.Selenium.Support.UI.Selected命名空间访问的选择列表的选项列表：
IWebElement elem = driver.FindElement(By.XPath("//select[@name='time_zone']"));
SelectElement selectList = new SelectElement(elem);
IList<IWebElement> options = selectList.Options;
You can then access each option as an IWebElement, such as:
然后，您可以将每个选项作为 IWebElement 访问，例如：
IWebElement firstOption = options[0];
Assert.AreEqual(firstOption.GetAttribute("value"), "-09:00");
回答by shamp00
Use IList<IWebElement>instead of List<IWebElement>.
使用IList<IWebElement>代替List<IWebElement>。
For instance:
例如：
IList<IWebElement> options = elem.FindElements(By.TagName("option"));
foreach (IWebElement option in options)
{
Console.WriteLine(option.Text);
}
回答by chivas_hvn
Here is code in Java to get all options in dropdown list.
这是 Java 中的代码，用于获取下拉列表中的所有选项。
WebElement sel = myD.findElement(By.name("dropdown_name"));
List<WebElement> lists = sel.findElements(By.tagName("option"));
for(WebElement element: lists)
{
String var2 = tdElement.getText();
System.out.println(var2);
}
Hope it may helpful to someone.
希望它可以对某人有所帮助。
回答by Anton
Select select = new Select(driver.findElement(By.id("searchDropdownBox")));
select.getOptions();//will get all options as List<WebElement>
回答by Madhu
To get all the dropdown values you can use List.
List<string> lstDropDownValues = new List<string>();
int iValuescount = driver.FindElement(By.Xpath("\html\....\select\option"))
for(int ivalue = 1;ivalue<=iValuescount;ivalue++)
{
string strValue = driver.FindElement(By.Xpath("\html\....\select\option["+ ivalue +"]"));
lstDropDownValues.Add(strValue);
}
回答by vivek k
WebElement drop_down =driver.findElement(By.id("Category"));
Select se = new Select(drop_down);
for(int i=0 ;i<se.getOptions().size(); i++)
System.out.println(se.getOptions().get(i).getAttribute("value"));
回答by Suman Verma
WebElement element = driver.findElement(By.id("inst_state"));
Select s = new Select(element);
List <WebElement> elementcount = s.getOptions();
System.out.println(elementcount.size());
for(int i=0 ;i<elementcount.size();i++)
{
String value = elementcount.get(i).getText();
System.out.println(value);
}
回答by hiram acebo
You can use selenium.Supportto use the SelectElementclass, this class have a property "Options" that is what you are looking for, I created an extension method to convert your web element to a select element
您可以使用selenium.Support使用SelectElement类，这个类有一个属性“选项”这是你在找什么，我创建了一个扩展方法到您的网络元素转换为选择要素
public static SelectElement AsDropDown(this IWebElement webElement)
{
return new SelectElement(webElement);
}
then you could use it like this
那么你可以像这样使用它
var elem = driver.FindElement(By.XPath("//select[@name='time_zone']"));
var options = elem.AsDropDown().Options
