Selenium CSS selector throwing OpenQA.Selenium.InvalidSelectorException - what's wrong?

Question

I am attempting to find a table cell using a CSS selector in Selenium. This is my selector:

//table[@id='prepaymentItemsDataGrid']//tr[@class='tablerowlight']/td[3]

The exception being thrown is:

Driver.FindElementByCssSelector("//table[@id='prepaymentItemsDataGrid']//tr[@class='tablerowlight']/td[3]") threw an exception of type 'OpenQA.Selenium.InvalidSelectorException'

What is wrong with my selector? How do I know what Selenium is complaining about?

I have tried simplifying it to:

//table[@id='prepaymentItemsDataGrid']

which has no effect.

Does Selenium have a different method of executing CSS selectors and how can I check that the selector is valid before trying to run it?

undetected Selenium · Accepted Answer · 2018-04-09 16:43:06Z

4

Though you have tried to use FindElementByCssSelector() but the values were of XPath. You can use either of the following Locator Strategies :

CssSelector :

Driver.FindElementByCssSelector("table#prepaymentItemsDataGrid tr.tablerowlight > td:nth-of-type(3)");

XPath :

Driver.FindElementXPath("//table[@id='prepaymentItemsDataGrid']//tr[@class='tablerowlight']/td[3]");

edited Apr 9, 2018 at 16:43

answered Apr 9, 2018 at 16:41

undetected Selenium

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1 Comment

Matt W Over a year ago

Crikey. Thank you! That was a wood for the trees moment. Guess I forgot what ChroPath was outputting. D'oh!

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