How To Allow Only One ChromeDriver At A Time Using Selenium C#?-CodePudding

I currently have a simple method which initiate a ChromeDriver using the following method:

public void ChromeDriver()

{

ChromeDriverStart();

}

ChromeDriverStart() refers to a public method in which I set the options for the driver which I have set using IWebDriver. Now let's say I will initiate a driver named driverx, I only want it to be initiated if there is not already an instance of driverx active. So far I tried the following if-statement inside the method: if (driverx = null)

My goal is to not start another instance of driverx when calling the method ChromeDriver().

Whole Code:

public IWebDriver 1driver;
public IWebDriver 2driver;
public IWebDriver 3driver;
public IWebDriver 4driver;

public void DriverStart() 
{
    1driver = new ChromeDriver();
}

        public void Driver()
        {
            if (driver1 = null)
            {
                DriverStart();
            }
        }

CodePudding user response：

A different approach than other answers mentioned in the comments would be to use DI.

<ItemGroup>
    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.1" />
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
    <PackageReference Include="Selenium.Support" Version="4.5.1" />
    <PackageReference Include="Selenium.WebDriver" Version="4.5.1" />
    <PackageReference Include="Selenium.WebDriver.ChromeDriver" Version="107.0.5304.6200" />
</ItemGroup>

// .NET 6 Console app

using IHost host = Create(args).Build();
using var scope = host.Services.CreateScope();
var provider = scope.ServiceProvider;

var driver1 = provider.GetRequiredService<IWebDriver>();
var driver2 = provider.GetRequiredService<IWebDriver>();

// If we use the scoped service only the one driver will be initiated.
// If we select to configure our service as transient then 
// both instances will be initiated

driver1.Navigate().GoToUrl(@"https://stackoverflow.com/");
driver2.Navigate().GoToUrl(@"https://stackoverflow.com/");

static IHostBuilder Create(string[] args) =>
         Host.CreateDefaultBuilder(args)
        .ConfigureServices((_, services) =>
        {
            // Uncomment one of them
            // services.AddScoped<IWebDriver, ChromeDriver>();
            // services.AddTransient<IWebDriver, ChromeDriver>();
        });

Of course this is a simple implementation of DI just for this demo. You will probably need to configure the drivers in different manner than your initial implementation. Maybe you could create a concrete class that injects IWebDriver and configure it according to your needs and then add it to DI as well.

Finally let me cut a long story short, using dependency injection you will have all your services into one location and also you can handle their lifecycles.

CodePudding user response：

Use the comparison operator to test for null:

if (driver1 == null)
{ //        ^^
    driver1 = new ChromeDriver();

The = operator is the assignment operator. The comparison operator uses two equals signs side-by-side: ==.