How to wait until dropdown selected option changes using selenium?

Question

Sometimes, based on some other actions on page, a dropdown selected item changes automatically without page reload (this dropdown has same no. of options everytime).
How can we wait until dropdown selected item changes using selenium webdriver C#?

Muzzamil · Answer

Please try below code to wait for changed dropdown option.
public static SelectElement FindSelectElementWhenPopulated(IWebDriver driver, By by, int delayInSeconds, string optionText)
    {
        WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(delayInSeconds));
        return wait.Until<SelectElement>(drv => 
        {
            SelectElement element = new SelectElement(drv.FindElement(by));
            if (element.SelectedOption.ToString().Contains(optionText))
            {
                return element;
            }

return null;
        }
        );
    }

and I call it like this to wait for changed drop down option “Orange”
Myclass.FindSelectElementWhenPopulated(driver, By.CssSelector("#ddlFruit_N"), 20, "Orange");

How to wait until dropdown selected option changes using selenium?

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