Selenium, how to get last element of a class in c#

Question

I am trying to return the last element with the class name MyClass. I am using selenium, but the following code does not work. I am not sure if I am setting it up correctly.

IJavaScriptExecutor js = (IJavaScriptExecutor)driver;
Console.WriteLine((string)js.ExecuteScript(".MyClass:last-child"));

Answer 1

If you are using C# as the tag in your question indicates, you don't need JSE. One way to do this is to use LINQ

using System.Collections.ObjectModel;
using System.Linq;

ReadOnlyCollection<IWebElement> elements = driver.FindElements(By.CssSelector(".MyClass"));
IWebElement lastElement = elements.ElementAt(elements.Count - 1);
string lastElementText = lastElement.Text;

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Just for fun try...

string lastElementText = driver.FindElement(By.CssSelector(".MyClass:last-child")).Text;

NOTE: Turns out this doesn't work... it returns the text of the first element. I'm assuming that :last-child is not supported.

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From a further discussion, OP wanted to get the text of the last element and then know when it changes (within a few seconds). This code should take care of that case...

By locator = By.CssSelector(".MyClass");
ReadOnlyCollection<IWebElement> elements = driver.FindElements(locator);
IWebElement lastElement = elements.ElementAt(elements.Count - 1);

WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(20));
wait.Until(d => d.FindElement(locator).Text != lastElement.Text);