Selenium with C# for Automated Browser Testing

Selenium is used to automate the desktop browser testing. It comes up with many components and from them, the major one is the web driver. Web driver is used for writing the code in different programming languages which will target the web elements and then apply the operation on it. We can use C#, Java, Python, and many other languages which can be used to work with it.

Why is C# useful for Automation Testing?

Using C# we easily do automation Testing. It is an open source and due to this different frameworks have support for this language.

1. There is a specialized package Manager known as NuGet Package Manager which comes up with so many different kinds of Packages.
2. Using these packages the testing work becomes easier. In C# we can also merge the unit testing with automation testing frameworks and this gives us so much power to check the result without running each script separately.

Selenium with C#

Selenium and C# become a solid combination because C# is one of the chosen languages to work with Selenium due to so many functions to manipulate and test the Websites. In C# we have NUnit Testing which is again a widely used testing framework and Selenium can be easily integrated with it. Due to this, we can run the unit tests for both the backend and frontend simultaneously and that also in parallel.

Get the elements using their ID or by their class name or their tag Name

//Mostly all element in DOM can be accessed using the TagName
IWebElement element = driver.FindElement(By.TagName("input"));

//Here we are sending the text to the Field which means 
//that we are writing into the Form Elements
 element.SendKeys("Text to be entered");

1. For Dropdown

// Find the dropdown by its ID
IWebElement dropdown = driver.FindElement(By.Id("dropdownId"));

// Create SelectElement object to select the value from Dropdown
SelectElement selectElement = new SelectElement(dropdown);

// Select an option by visible text
selectElement.SelectByText("Option to select");

2. For Buttons

//Again Finding the button
IWebElement button = driver.findElement(By.cssSelector("button[type='submit']"));
//Applying the Click function on it.
button.click();

Configure Selenium with Visual Studio in C#

We will create a Console Application in which we will create a selenium script and we will interact with the website.

Step 1: Download and install C# IDE (Visual Studio)

1. We can download Visual Studio 2022 from the official website.
2. If you are a student or learner then you can go with the community version. And if you want to use it for Production or work then you can choose Professional Version as well.

Step 2: Create a New Project in Visual Studio

Choose the Create new project from the Menu.

Step 3: Select Console Application

1. Now from the list choose the Console Application with C# as the Programming Language.

2. Our project has been created successfully and now we will install some packages to run the Selenium.

Step 4: Installing NuGet Packages

For creating a selenium application and using selenium methods we have to install 3 packages.

1. Selenium.WebDriver

2. Selenium.Support

3. Selenium.Webdriver.ChromeDriver

This will be used to say to Selenium to choose which browser in our case we are going to use Chrome and thus we are installing this Package. If you want to try any other browser then you have to install those packages accordingly.

Step 5: Installing Chrome Driver

For executing the scripts we will require a Chrome driver which we load as soon as we run the application and all the operations will be executed in that only. We can download the Chrome driver from Here.

Remember you have to choose the version of the driver according to the Current Version of Chrome. If the version doesn't match then an error will be thrown rather than execution.

So, now we are good to go with writing the script to automate the browser with Selenium. But before that let's create one HTML form with which we can interact and fill that form using selenium.

Code for HTML Form

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link
      href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
      rel="stylesheet"
      integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC"
      crossorigin="anonymous"
    />
    <title>Form</title>
  </head>
  <body>
    <div class="container mt-5 p-5">
      <h1>Form Submission with Selenium</h1>
      <form class="row g-7" id="myForm" onsubmit="submitForm(event)">
        <div class="col-8">
          <br />

          <div class="mb-3 row">
            <label for="FirstName" class="col-sm-2 col-form-label"
              >FirstName</label
            >
            <div class="col-sm-10">
              <input type="text" class="form-control" id="FirstName" />
            </div>
          </div>

          <div class="mb-3 row">
            <label for="DOB" class="col-sm-2 col-form-label">DOB</label>
            <div class="col-sm-10">
              <input type="date" class="form-control" id="DOB" />
            </div>
          </div>

          <div class="mb-3 row">
            <label for="Email" class="col-sm-2 col-form-label">Email</label>
            <div class="col-sm-10">
              <input type="email" class="form-control" id="Email" />
            </div>
          </div>

          <div class="mb-3 row">
            <label for="inputNumber" class="col-sm-2 col-form-label"
              >Number</label
            >
            <div class="col-sm-10">
              <input type="number" class="form-control" id="inputNumber" />
            </div>
          </div>

          <div class="mb-3 row">
            <label class="col-sm-2 col-form-label" for="Gender">Gender</label>
            <div class="form-check col-sm-2">
              <input
                class="form-check-input"
                type="radio"
                name="Gender"
                id="Male"
                value="Male"
              />
              <label class="form-check-label" for="Male">Male</label>
            </div>
            <div class="form-check col-sm-2">
              <input
                class="form-check-input"
                type="radio"
                name="Gender"
                id="Female"
                value="Female"
              />
              <label class="form-check-label" for="Female">Female</label>
            </div>
          </div>

          <button class="btn btn-info col-sm-2" type="submit">Submit</button>
        </div>
      </form>
    </div>

    <script>
      function submitForm(event) {
        // Prevent the form from actually submitting
        event.preventDefault();

        // Extract form data
        const firstName = document.getElementById("FirstName").value;
        const dob = document.getElementById("DOB").value;
        const email = document.getElementById("Email").value;
        const number = document.getElementById("inputNumber").value;
        const gender = document.querySelector(
          'input[name="Gender"]:checked'
        ).value;

        if (!/^\d{10}$/.test(number)) {
          alert("Error");
          return;
        }

        // Create a message with the form data
        const message = `First Name: ${firstName}\nDOB: ${dob}\nEmail: ${email}\nNumber: ${number}\nGender: ${gender}`;

        // Display an alert with the form data
        alert(message);

        document.getElementById("FirstName").value = "";
        document.getElementById("DOB").value = "";
        document.getElementById("Email").value = "";
        document.getElementById("inputNumber").value = "";
        document.querySelector('input[name="Gender"]:checked').checked = false;
      }
    </script>
  </body>
</html>

Now interacting with this form will help us understand the working and the flow of the selenium application. So we will first get the elements and then on that, we will perform the operations. So, that we can get an idea of both the process.

Selenium Test Script using C#

using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;

namespace Csharp_Application
{
    internal class Program
    {
        static void Main(string[] args)
        {
          //Creating instance of Chrome Driver
            IWebDriver driver = new ChromeDriver();

            driver.Navigate().GoToUrl("http://127.0.0.1:5500/index.html");
            try
            {
              //Finding the element based on the Id
              //Then we are Sending the values to those fields
                driver.FindElement(By.Id("FirstName")).SendKeys("ram");
                driver.FindElement(By.Id("DOB")).SendKeys("19-01-2001");
                driver.FindElement(By.Id("Email")).SendKeys("[email protected]");
                driver.FindElement(By.Id("inputNumber")).SendKeys("1234566890");
                driver.FindElement(By.Id("Male")).Click();

                  //Finding the button and clicking on that button
                driver.FindElement(By.CssSelector("button[type='submit']")).Click();

                  //As per the frontend Alert box should get opens
                  //We are tracking that but shifting our control from screen to alert
                IAlert alert = driver.SwitchTo().Alert();
                string alertText = alert.Text;

                // Check if the alert is open
                if (!string.IsNullOrEmpty(alertText))
                {
                    Console.WriteLine("Alert is open, and the content is: \n" + alertText);
                    // You can accept the alert if needed: alert.Accept();
                }
                else
                {
                    Console.WriteLine("No alert found");
                }
            }
            catch (Exception e)
            {
              //This will execute when any error like if the url didn't load
              //Or the browser didn't get open.
                Console.WriteLine(e.Message);
            }
            Console.ReadLine();
            driver.Quit();
        }
    }
}

In the above code, the FindElement method is used to get the element. We can store these elements in the variable if we want to use them later. In this case, we have directly sent the keys which will be used to write into the field. Later on, we will find the button and then we will click on that.

Output of Selenium Test Script in Visual Studio

Conclusion

So, this was basic of the Selenium with C# in which we have just found the element and then applied some operation. We can also move ahead with this, here we have used ID to get the element. But we can use classname or we can also use Xpath. These are the advanced features of selenium in C# which are generally done after this basic one.