如何确定网站withSelenium中是否有特定的文本？

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首先，有一个类似的问题在现场，但它没有工作，这就是为什么我要问。我应该决定在HTML代码上是否有一个特定的文本LİSTELENECEK VERİ BULUNAMAMIŞTIR.，只有id属性在这里是HTML：

<center id="genelUyariCenterTag">LİSTELENECEK VERİ BULUNAMAMIŞTIR.</center>

以下是C#代码：

 WebClient client = new WebClient();
void goMadde15Down() {
                    driver.FindElement(By.LinkText("İŞVEREN")).Click();
                    driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(10);
                    driver.FindElement(By.LinkText("TEŞVİKLER VE TANIMLAR")).Click();
                    driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(10);
                    driver.FindElement(By.LinkText("4447/GEÇİCİ 15. MADDE LİSTELEME/SİLME")).Click();
                    driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(10);
                    string siteSource15 = client.DownloadString("https://uyg.sgk.gov.tr/IsverenSistemi");

                    string strText = driver.FindElement(By.XPath("//center[@id='genelUyariCenterTag' and contains(.,'BULUNAMAMIŞTIR')]")).Text;

                    if (strText.Contains("LİSTELENECEK VERİ BULUNAMAMIŞTIR."))
                    {
                        Console.WriteLine("madde15 there is no Excel");
                    }
                    else
                    {
                        Console.WriteLine("madde 15 there is an Excel");
                    }

问题是，条件总是收敛于else子句。

Answer 1

与if和else不同，如果可以使用try-catch块，则可以使用以下代码：

 void goMadde15Down() {
       driver.FindElement(By.LinkText("İŞVEREN")).Click();
       driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(10);
       driver.FindElement(By.LinkText("TEŞVİKLER VE TANIMLAR")).Click();
       driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(10);
       driver.FindElement(By.LinkText("4447/GEÇİCİ 15. MADDE LİSTELEME/SİLME")).Click();
       driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(10);

            try  {
                    Console.WriteLine("There is an Excel File");
                    //Download code here


                 }
            catch (Exception e)
                 {
                        Console.WriteLine("There is no Excel File");
                 }

另外，try catch块比if和else更有效。

Answer 2

归纳WebDriverWait和ElementExists并在xpath下面使用。

您需要从SeleniumExtras.WaitHelpers安装Manage Nuget Packages包。

WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(10));
string strText=wait.Until(SeleniumExtras.WaitHelpers.ExpectedConditions.ElementExists(By.XPath("//center[@id='genelUyariCenterTag' and contains(.,'BULUNAMAMIŞTIR')]"))).Text;
    if (strText.Contains("LİSTELENECEK VERİ BULUNAMAMIŞTIR."))
            {
                Console.WriteLine("madde15 there is no Excel");
            }
     else
            {
                Console.WriteLine("madde 15 there is an Excel");
             }

尝试不使用WebDriverWait的更新版本

string strText=driver.FindElement(By.XPath("//center[@id='genelUyariCenterTag' and contains(.,'BULUNAMAMIŞTIR')]")).Text;

            if (strText.Contains("LİSTELENECEK VERİ BULUNAMAMIŞTIR."))
                {
                Console.WriteLine("madde15 there is no Excel");
                }
                else
                {
                Console.WriteLine("madde 15 there is an Excel");
                }