Cannot Convert from OpenQA.Selenium.IWebElement to Open.Qa.Selenium.By

Question

I have been working on making my Selenium Framework a Page Factory, however i am struggling to get the Wait.Until commands working in my Extension Class.

public static void Wait(this IWebElement element, IWebDriver driver, float TimeOut)
{
    WebDriverWait Wait = new WebDriverWait(driver, TimeSpan.FromSeconds(TimeOut));
    return Wait.Until(ExpectedConditions.ElementIsVisible(element));
}

If I use the above code I get the error Cannot Convert from OpenQA.Selenium.IWebElement to Open.Qa.Selenium.By

Any suggestions how can I amend the code above to make it work in the By model I am using?

mrfreester · Accepted Answer · 2017-07-18 14:52:17Z

There is no ExpectedConditions.ElementIsVisible(IWebElement). Unfortunately, you can only use ElementIsVisible with By objects.

If appropriate, you could substitute with ExpectedConditions.ElementToBeClickable(IWebElement), which is a slightly different case that also checks that the element is enabled in addition to being visible. But this may satisfy your requirement.

Alternatively, you could just call element.Displayed in a custom WebDriverWait, making sure to ignore or catch the NoElementException

Here is an old implementation of this I've used and changed for your case, there may be a cleaner way to do it now:

new WebDriverWait(driver, TimeSpan.FromSeconds(TimeOut))
{
    Message = "Element was not displayed within timeout of " + TimeOut + " seconds"
}.Until(d => 
{
    try
    {
        return element.Displayed;
    }
    catch(NoSuchElementException)
    {
        return false;
    }
}

A quick explanation for the code above... It will try to execute element.Displayed over and over until it returns true. When the element does not exist, it will throw a NoSuchElementException which will return false so the WebDriverWait will continue to execute until both the element exists, and element.Displayed returns true, or the TimeOut is reached.

tuomastik · Accepted Answer · 2018-03-22 06:18:14Z

0

Replace

return Wait.Until(ExpectedConditions.ElementIsVisible(element));

with the below line of code and check, as this worked for me

wait.Until(ExpectedConditions.ElementIsVisible(By.Id("ctlLogin_UserName")));

wherein "ctlLogin_UserName" is the ID of your web element.

edited Mar 22, 2018 at 6:18

tuomastik

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answered Mar 22, 2018 at 5:42

cynthia

1

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