Issue with the functionality of Selenium translate class in C#

Question

Issue with the functionality of Selenium translate class in C#

I have developed a C# class that utilizes selenium to open a website and translate input text. This class is integrated into my project for translation purposes.

Instead of using an API, I opted for the website's translation service as it allows me to translate all characters for free. Using an API would require payment which is not feasible for my small business...

The issue arises when a long string is set as input, resulting in an error message

OpenQA.Selenium.WebDriverException: 'target frame detached (Session info: chrome=102.0.5005.63)

. This problem also occurs when the internet connection is unstable (e.g., regular Wi-Fi). I am seeking a solution to program the class so that it waits for the translation completion without errors.

Main Code

public MainWindow()
        {
            InitializeComponent();

            
            String[] frenchSentences = { "S’il vous plaît", "Je suis désolé", "Madame/Monsieur/Mademoiselle", "Excusez-moi", "Je ne comprends pas", "Je voudrais...", "Non, pas du tout", "Où sommes-nous?", "Pourriez-vous m’aider?", "Répétez s'il vous plaît.", "Où puis-je trouver un bon restaurant/café/la plage/le centre-ville?", "Je cherche cette adresse.", "J'ai besoin d'une chambre double..", "Je voudrais annuler ma réservation.", "Où est la boutique duty-free?", "Comment puis-je vous aider?", "Je cherche des chaussures.", "C’est combien?", "C’est trop cher!" };
            List<String> outcomes = new List<string>();

            String LongFrenchText = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur sit amet metus fermentum, dapibus ante nec, gravida sapien. Nam euismod, velit sit amet tincidunt condimentum, odio lectus scelerisque enim, eget eleifend nulla tortor vel turpis. Vestibulum vehicula dictum orci at semper.\r\nInteger mollis libero quis felis bibendum, non tempor magna efficitur. Nullam lacinia varius tortor id placerat. Aenean pellentesque porta sollicitudin. Maecenas ac nisl urna. Donec malesuada mauris et tristique bibendum.\r\nPhasellus hendrerit suscipit justo, at rhoncus nisi posuere eu. Curabitur vitae suscipit lacus. Ut interdum, elit sed convallis vestibulum, massa tortor malesuada leo, eget pretium eros tellus vel nisi. Integer varius purus lorem, non volutpat mi mattis ut. Vivamus iaculis lobortis risus, et tempus quam commodo id.\r\nPraesent venenatis augue a ex sagittis feugiat. Proin accumsan ullamcorper blandit. Quisque tempor vulputate efficitur. Morbi sed ultrices diam. Integer vitae finibus ligula. Cras at imperdiet mauris. Nullam fringilla vehicula enim, sed dictum quam aliquet ac.\r\nIn hac habitasse platea dictumst. Cras in pulvinar orci. Fusce vel egestas odio. Phasellus tempus erat vel viverra tristique. Suspendisse sodales faucibus nunc, nec congue justo commodo nec. Duis eget bibendum nisi.\r\ncrass phasellus fermentum nullam with porttitor consequat too mom aesnaher lorem forevermore.\r\nsollictudin achington wideshire lordling our eminent graces monshumenor well amongst selly handfast mosely nonecoded undertow heathlands bea ariver rathe abb lifeblood stagecoach perigrinations.\r\nExcepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim ID est laborum.";

            /*  // short translations
            foreach (var item in frenchSentences)
            {
                ChromeDriver driver = new ChromeDriver();
                String translation = TranslateNowClass.translateText(new ChromeDriver(), item, "fr", "en");
                outcomes.Add(translation);
                driver.Close(); 
            }*/

            // long translation
            ChromeDriver driver = new ChromeDriver();
            String translation = TranslateNowClass.translateText(new ChromeDriver(), LongFrenchText, "fr", "en");
            outcomes.Add(translation);
            driver.Close();
            

            String stringForBreakpoint = "";

        }

Code in Class

[Serializable]
    public class TranslateNowClass
    {
        public static String translateText(IWebDriver driver, String text, String languageSource, String languageDestination)
        {
            // nl - en - de - fr -es -it
            driver.Url = "https://www.translatethis.com/sentences/";
            driver.FindElement(By.Id("translatetxt")).SendKeys(text);

            SelectElement selectFrom = new SelectElement(driver.FindElement(By.Id("sselectfrom")));
            selectFrom.SelectByValue(languageSource);

            SelectElement selectTo = new SelectElement(driver.FindElement(By.Id("sselectto")));
            selectTo.SelectByValue(languageDestination);

            driver.FindElement(By.XPath("//input[@title='Translate']")).Click();

            WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(20));
            wait.Until(driver => driver.FindElement(By.ClassName("mt-translation-content")).Text != "");

            IWebElement content = driver.FindElement(By.ClassName("mt-translation-content"));
            String translatedText = content.Text;

            driver.Close();
            driver.Quit();

            return translatedText;

        }
    }

c#selenium

Answer 1

Answer №1

Consider implementing the following solution:

Start by creating a translation handling class

public interface ITranslator : IDisposable
{
    void ClearInput();
    string Translate(string text);
}

public class Translator : ITranslator
{
    private const string Url = "https://www.vertalen.nu/zinnen/";
    private const int Timeout = 20;

    private By _source = By.Id("vertaaltxt");
    private By _destination = By.Id("resulttxt");
    private By _submit = By.XPath("//input[@type = 'submit']");

    private readonly WebDriverWait _wait;
    private readonly IWebDriver _driver;

    public Translator()
    {
        _driver = new ChromeDriver();
        _wait = new WebDriverWait(_driver, TimeSpan.FromSeconds(Timeout));
        _driver.Navigate().GoToUrl(Url);
    }

    public string Translate(string text)
    {
        _driver.FindElement(_source).SendKeys(text);
        _driver.FindElement(_submit).Click();

        _ = _wait.Until(d => d.FindElement(_destination).Text.Length > 0);
        return _driver.FindElement(_destination).Text;
    }

    public void ClearInput()
    {
        _wait.Until(d => d.FindElement(_source)).Clear();
    }

    public void Dispose()
    {
        _driver.Dispose();
    }
}

The following example demonstrates a WinForms implementation that can be adapted to any UI application:

public partial class MainWindow : Form
{
    private readonly ITranslator _translator;
    private const int MaxChars = 1500;

    private int _currentCharsCount;

    public MainWindow()
    {
        InitializeComponent();
        _translator = new Translator();
    }

    private void translateBtn_Click(object sender, EventArgs e)
    {
        destinationTextBox.Text = _translator.Translate(sourceTextBox.Text);
        _translator.ClearInput();

        // Alternatively, for improved user experience, consider using the code below
        // Note: if you decide to use this code, ensure to mark this method as async

        //await Task.Run(() =>
        //{
        //    destinationTextBox.Text = _translator.Translate(sourceTextBox.Text);
        //    _translator.ClearInput();
        //});
    }

    private void MainWindow_FormClosing(object sender, FormClosingEventArgs e)
    {
        _translator.Dispose();
    }

    private void clickBtn_Click(object sender, EventArgs e)
    {
        sourceTextBox.Clear();
        destinationTextBox.Clear();
        charsCounter.Text = $"{MaxChars} characters remaining";
    }

    private void sourceTextBox_TextChanged(object sender, EventArgs e)
    {
        _currentCharsCount = MaxChars - sourceTextBox.TextLength;
        charsCounter.Text = $"{_currentCharsCount} characters remaining";
    }
}

https://i.stack.imgur.com/GSwfP.png

Answer 2

Consider implementing the following solution:

Start by creating a translation handling class

public interface ITranslator : IDisposable
{
    void ClearInput();
    string Translate(string text);
}

public class Translator : ITranslator
{
    private const string Url = "https://www.vertalen.nu/zinnen/";
    private const int Timeout = 20;

    private By _source = By.Id("vertaaltxt");
    private By _destination = By.Id("resulttxt");
    private By _submit = By.XPath("//input[@type = 'submit']");

    private readonly WebDriverWait _wait;
    private readonly IWebDriver _driver;

    public Translator()
    {
        _driver = new ChromeDriver();
        _wait = new WebDriverWait(_driver, TimeSpan.FromSeconds(Timeout));
        _driver.Navigate().GoToUrl(Url);
    }

    public string Translate(string text)
    {
        _driver.FindElement(_source).SendKeys(text);
        _driver.FindElement(_submit).Click();

        _ = _wait.Until(d => d.FindElement(_destination).Text.Length > 0);
        return _driver.FindElement(_destination).Text;
    }

    public void ClearInput()
    {
        _wait.Until(d => d.FindElement(_source)).Clear();
    }

    public void Dispose()
    {
        _driver.Dispose();
    }
}

The following example demonstrates a WinForms implementation that can be adapted to any UI application:

public partial class MainWindow : Form
{
    private readonly ITranslator _translator;
    private const int MaxChars = 1500;

    private int _currentCharsCount;

    public MainWindow()
    {
        InitializeComponent();
        _translator = new Translator();
    }

    private void translateBtn_Click(object sender, EventArgs e)
    {
        destinationTextBox.Text = _translator.Translate(sourceTextBox.Text);
        _translator.ClearInput();

        // Alternatively, for improved user experience, consider using the code below
        // Note: if you decide to use this code, ensure to mark this method as async

        //await Task.Run(() =>
        //{
        //    destinationTextBox.Text = _translator.Translate(sourceTextBox.Text);
        //    _translator.ClearInput();
        //});
    }

    private void MainWindow_FormClosing(object sender, FormClosingEventArgs e)
    {
        _translator.Dispose();
    }

    private void clickBtn_Click(object sender, EventArgs e)
    {
        sourceTextBox.Clear();
        destinationTextBox.Clear();
        charsCounter.Text = $"{MaxChars} characters remaining";
    }

    private void sourceTextBox_TextChanged(object sender, EventArgs e)
    {
        _currentCharsCount = MaxChars - sourceTextBox.TextLength;
        charsCounter.Text = $"{_currentCharsCount} characters remaining";
    }
}

https://i.stack.imgur.com/GSwfP.png

Issue with the functionality of Selenium translate class in C#

Answer №1

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