Getting OpenQA.Selenium.InvalidSelectorException Trying to Find an Element

[Chrissy Freiboth]

I am loading the url https://www.pinterest.com/login in the chrome driver and trying to find the Login Button so I can execute the click method but I get the exception below when executing this code.

OpenQA.Selenium.InvalidSelectorException - Compound class names not allowed. Cannot have whitespace in class name. Use CSS selectors instead.

Code:

IWebElement ele1 = driver.FindElement(By.ClassName("red SignupButton active"));

Here is the button code.

<div data-test-id="registerFormSubmitButton"><button aria-label="" class="red SignupButton active" type="submit" style="border: 0px; height: 36px; display: inline-block; border-radius: 20px; -webkit-font-smoothing: antialiased; padding: 0px 18px; font-size: 15px; font-weight: bold; outline: none; box-shadow: none; cursor: pointer; margin-top: 10px; vertical-align: middle; text-align: center; background-color: rgb(230, 0, 35); color: rgb(255, 255, 255); width: 100%;"><div>Log in</div></button></div>

There is no name or ID, just a class name. Is there some other method I can search by to allow the driver to find the button?

[Jim Evans]

Just like the exception message says, you should use CSS Selectors instead.

driver.FindElement(By.CssSelector("button.SignupButton.active.red"))

Note that order doesn’t matter for the classes to be found in the class attribute of the element, and that each term separated by white space is considered a separate class for the element.

[Kogul S]

Hi, 

This solution will help, please go through the below link:

https://stackoverflow.com/questions/32043877/compound-class-names-not-permitted-error-webdriver 

Thanks & Regards, 

S. Kogul 

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[Chrissy Freiboth]

Thanks. I got it to work.