How to check if the Firefox Driver is opened in Selenium C#?

Question

I'm working in WinForms C# with Selenium Firefox WebDrivers and I'm using a code like this to close the driver:

driver.Close();

But I'm often getting errors that the driver is already closed. How can I check if the driver is opened (or already closed) ?

Also if anyone here knows how could I hide it in c#? Like hide to FireFox Window.

Answer 1

You can query webDriver for a current window handle. If it exists, then call quit.

if(!String.IsNullOrEmpty(driver.CurrentWindowHandle))
{
     driver.Quit();
}

Answer 2

use a try catch block.

try
{

driver.Close(); 
//driver will be closed if it is opened

}

catch(Exception ex)
{
   //if driver is already closed, your code will not crash due to catch block.
}

Answer 3

WebDriverException is thrown if try to call driver.CurrentWindowHandle after driver closed. Good idea to make exception as specific as possible, so catch WebDriverException.

try
{
    driver.Quit();
}
catch (WebDriverException e)
{
    // Happens when call Quit but driver already closed.  Can be ignored.
}