Best strategy to organise drivers (and: ChromeOptions.BinaryLocation not working?)

[Michael Baas]

I would like to test my app against diverse versions of Chrome & Firefox on multiple machines & platforms and avoid duplicating webdriver.dll into every driver-folder. So I came up with the following folder-structure for the drivers:

--Drivers / Chrome80  / Win / 

              +------ / Unix /

              +----- /Mac /

          / Chrome 81 ...

          / Firefox73 / ...

          / WebDriver3

          / WebDriver4

So then my code uses the webdriver.dll from the appropriate dir (and in case of v3 also webdriver.support.dll) and I'm instantiating i.e. ChromeDriver by using the constructor-syntax that gets an instance of ChromeOptions. The only option that I set is BinaryLocation, its value is "C:\blah\Drivers\ChromeDriver81\Win\chromedriver.exe" and that file exists.

However, I do get this:

OpenQA.Selenium.DriverServiceNotFoundException: The chromedriver.exe file does not exist 
in the current directory or in a directory on the PATH environment variable.
The driver can be downloaded at http://chromedriver.storage.googleapis.com/index.html.    
   bei OpenQA.Selenium.DriverService.FindDriverServiceExecutable(String executableName, Uri downloadUrl)    
   bei OpenQA.Selenium.Chrome.ChromeDriverService.CreateDefaultService()   
   bei OpenQA.Selenium.Chrome.ChromeDriver..ctor(ChromeOptions options)

It also happens with WebDriver 3.1 and also with Firefox (geckodriver73) when setting options.BrowserExecutableLocation.  I can't imagine an error in Selenium would have gone undetected for so long. But I also can't see what I might be doing wrong - so any insight will be much appreciated.

[Gajanan Mahajan]

Can you please check if  https://github.com/bonigarcia/webdrivermanager  helps which dynamically downloads driver for respective OS/Browser? and you do not have to care of maintaining drivers.

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[Jim Evans]

I think you may be misunderstanding the purpose of the BinaryLocation and BrowserExecutableLocation properties. Those properties are used to describe the location of the *browser*. The location of the *driver* executable is specified in the overload of CreateDefaulfService() that takes a string, indicating the path to the driver. 

[Michael Baas]

THANKS Jim - you are absolutely right! That was the bit I got wrong - it now happily creates that instance :)