如果你是在这种情况下:

a)只是想按下键，但你没有一个特定的webElement来点击

b)您正在使用Selenium 2 (WebDriver)

那么解决方案是:

    Actions builder = new Actions(webDriverInstance);
    builder.sendKeys(Keys.RETURN).perform();

Java

driver.findElement(By.id("Value")).sendKeys(Keys.RETURN);

OR,

driver.findElement(By.id("Value")).sendKeys(Keys.ENTER);

Python

from selenium.webdriver.common.keys import Keys
driver.find_element_by_name("Value").send_keys(Keys.RETURN)

OR,

driver.find_element_by_name("Value").send_keys(Keys.ENTER)

OR,

element = driver.find_element_by_id("Value")
element.send_keys("keysToSend")
element.submit()

Ruby

element = @driver.find_element(:name, "value")
element.send_keys "keysToSend"
element.submit

OR,

element = @driver.find_element(:name, "value")
element.send_keys "keysToSend"
element.send_keys:return

OR,

@driver.action.send_keys(:enter).perform
@driver.action.send_keys(:return).perform

C#

driver.FindElement(By.Id("Value")).SendKeys(Keys.Return);

OR,

driver.FindElement(By.Id("Value")).SendKeys(Keys.Enter);

尝试使用XPath表达式搜索元素，然后，以下代码工作:

driver.findElement(By.xpath(".//*[@id='txtFilterContentUnit']")).sendKeys(Keys.ENTER);

现在Selenium 2已经发布了，发送一个Enter键会更容易一些，因为你可以使用Selenium .webdriver.remote.webelement. webelement类的send_keys方法(这个示例代码在Python中，但在Java中存在相同的方法):

>>> from selenium import webdriver
>>> wd = webdriver.Firefox()
>>> wd.get("http://localhost/example/page")
>>> textbox = wd.find_element_by_css_selector("input")
>>> textbox.send_keys("Hello World\n")

driver.findElement (By.id(“价值”).sendKeys (Keys.RETURN);或driver.findElement (By.id(“价值”).sendKeys (Keys.ENTER);

对于使用XPath的Selenium WebDriver(如果键是可见的):

driver.findElement(By.xpath("xpath of text field")).sendKeys(Keys.ENTER);

or,

driver.findElement(By.xpath("xpath of text field")).sendKeys(Keys.RETURN);