C# selenium stale element reference exception - c#

I am doing some c# selenium project, and I am continously getting StaleElementReferenceException error.
using System;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
class Hello
{
static void Main()
{
IWebDriver driver = new ChromeDriver();
driver.Navigate().GoToUrl("https://www.youtube.com/");
driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(1);
if (driver.FindElement(By.XPath("//*[#id=\"content\"]/div[2]/div[6]/div[1]/ytd-button-renderer[2]/yt-button-shape/button/yt-touch-feedback-shape/div")).Displayed)
{
driver.FindElement(By.XPath("//*[#id=\"content\"]/div[2]/div[6]/div[1]/ytd-button-renderer[2]/yt-button-shape/button/yt-touch-feedback-shape/div")).Click();
}
else if (driver.FindElement(By.Id("dialog")).Displayed)
{
driver.FindElement(By.Id("button")).Click();
}
driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(12);
driver.FindElement(By.XPath("//*[#id=\"text\"]")).Click();
}
}
I am searching for 2 hours, I watched so many Indian tutorials. Does someone know how to fix it?
error happens in this line:
driver.FindElement(By.XPath("//*[#id=\"text\"]")).Click();
Thanks.

Prior to the last click, within if() and else if() you are invoking click() method which may trigger a change in the DOM Tree, which possibly causing StaleElementReferenceException.
Solution
Ideally to Click() on any clickable element you have to induce WebDriverWait for the ElementToBeClickable() and you can use either of the following Locator Strategies:
Using CssSelector:
new WebDriverWait(driver, TimeSpan.FromSeconds(20)).Until(ExpectedConditions.ElementToBeClickable(By.CssSelector("#text"))).Click();
Using XPath:
new WebDriverWait(driver, TimeSpan.FromSeconds(20)).Until(ExpectedConditions.ElementToBeClickable(By.XPath("//*[#id='text']"))).Click();

Related

How to Find the reCAPTCHA element and click on it in c# Selenium

Hello everyone I need some help. There is URL: http://lisans.epdk.org.tr/epvys-web/faces/pages/lisans/petrolBayilik/petrolBayilikOzetSorgula.xhtml. As you can see in screenshot I need to click checkbox Captcha.
https://i.stack.imgur.com/xjXaA.png
Here is my code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Support.UI;
namespace AkaryakitSelenium
{
class Program
{
private static string AkaryakitLink = "http://lisans.epdk.org.tr/epvys-web/faces/pages/lisans/petrolBayilik/petrolBayilikOzetSorgula.xhtml";
static void Main(string[] args)
{
IWebDriver driver = new ChromeDriver();
IJavaScriptExecutor js = driver as IJavaScriptExecutor;
driver.Navigate().GoToUrl(AkaryakitLink);
var kategoriCol = driver.FindElements(By.CssSelector(".ui-selectonemenu-trigger.ui-state-default.ui-corner-right"));
var x = kategoriCol[3];
x.Click();
var deneme = driver.FindElement(By.Id("petrolBayilikOzetSorguKriterleriForm:j_idt52_1"));
deneme.Click();
var check = driver.FindElement(By.Id("recaptcha-anchor"));
check.Click();
}
}
}
And lastly this error that I am facing:
"OpenQA.Selenium.NoSuchElementException: 'no such element: Unable to
locate element: {"method":"css
selector","selector":"#recaptcha-anchor"}"
Thank you for your help.
The element you are looking for is inside an iframe :
//iframe[#title='reCAPTCHA']
first you need to switch to iframe like this :
new WebDriverWait(driver, TimeSpan.FromSeconds(3)).Until(ExpectedConditions.FrameToBeAvailableAndSwitchToIt(By.XPath("//iframe[#title='reCAPTCHA']")));
then you can perform a click on it :
var check = driver.FindElement(By.Id("recaptcha-anchor"));
check.Click();
PS : captchas are not meant to be automated. since Captcha stands for CAPTCHA stands for the Completely Automated Public Turing test to tell Computers and Humans Apart.
You can not bypass captcha with Selenium.
It is designed to avoid automated access to web pages as described here and in many other places.

C# selenium instagram login issue

Hi everyone recently my mom created instagram account for his work and I want to make him auto follower bot in selenium but whenever I try to test this few times instagram just locks me out by saying Please try again in few minutes but It just keeps saying after 5-10-20 minutes even hours any suggestions ? How can I test this ?
With this code just logs in and scroll down in main page where you can follow people by randomly but I cant follow all of them , how can I adress follow button every time ?
using System;
using System.Collections.Generic;
using System.Threading;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Support.UI;
namespace InstagramFollower
{
class Program
{
private static readonly string Pusername = "sorrycantshare";
private static readonly string Ppassword = "sorrycantshare";
private static int sayac = 1;
public static IWebDriver driver = new ChromeDriver();
static void Main()
{
WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(100));
driver.Navigate().GoToUrl("https://www.instagram.com/");
//driver.Manage().Window.Maximize();
Console.WriteLine("Siteye açıldı");
wait.Until(SeleniumExtras.WaitHelpers.ExpectedConditions.ElementIsVisible(By.Name("username")));
IWebElement username = driver.FindElement(By.Name("username"));
IWebElement password = driver.FindElement(By.Name("password"));
IWebElement loginbtn = driver.FindElement(By.CssSelector(".Igw0E.IwRSH.eGOV_._4EzTm"));
username.SendKeys(Pusername);
password.SendKeys(Ppassword);
loginbtn.Click();
Console.WriteLine("Hesaba giriş yapıldı");
ElementToClickableCssSelector(".sqdOP.L3NKy.y3zKF");
driver.Navigate().GoToUrl($"https://www.instagram.com");
Console.WriteLine("Anasayfaya yönlendirildi");
ElementToClickableCssSelector(".aOOlW.HoLwm");
IWebElement notNow = driver.FindElement(By.CssSelector(".aOOlW.HoLwm"));
notNow.Click();
IJavaScriptExecutor js = (IJavaScriptExecutor)driver;
js.ExecuteScript("window.scrollTo(0, document.body.scrollHeight);");
Thread.Sleep(1500);
js.ExecuteScript("window.scrollTo(0, document.body.scrollHeight);");
Thread.Sleep(2500);
ElementToClickableCssSelector(".Szr5J._6CZji");
Listpeople();
Thread.Sleep(3500);
/*
IWebElement followbtn = driver.FindElement(By.CssSelector(".sqdOP.L3NKy._4pI4F.y3zKF"));
followbtn.Click(); // It follows first person on line but It gives error for others.
*/
}
public static void Listpeople()
{
IReadOnlyCollection<IWebElement> followersname = driver.FindElements(By.CssSelector(".FPmhX.notranslate.Qj3-a"));
IWebElement nextbtn = driver.FindElement(By.CssSelector(".Szr5J._6CZji"));
foreach (IWebElement follower in followersname)
{
Console.WriteLine(sayac.ToString() + " ==> " + follower.Text);
sayac++;
if (sayac == 8)
{
nextbtn.Click();
}
}
}
public static void ElementToClickableCssSelector(string target)
{
WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(100));
wait.Until(SeleniumExtras.WaitHelpers.ExpectedConditions.ElementToBeClickable(By.CssSelector(target)));
}
}
}
Well I had to read some topics about it turns out instagram detects selenium webdriver but I belive in my case is different.Reason I got error of please try again in later is beacuse my account does not log out , every time I log in and test after I stop building and shutdown cmd and browser so It doesnt log out.I am now writing a void to log out for after I test it

C# Selenium bot element selection trouble

I am trying to make a bot that goes through drop-downs and makes selections but it's having trouble finding the element. The code is below.
using System;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Support.Extensions;
using OpenQA.Selenium.Support.UI;
namespace selenium_test
{
class Program
{
static void Main(string[] args)
{
IWebDriver driver;
driver = new ChromeDriver("C:\\");
Console.WriteLine("ChromeDriver Initialized");
driver.Url = "https://odyssey.gwinnettcourts.com/Portal/Home/Dashboard/26";
IWebElement typeElement = driver.FindElement(By.XPath(".//option[#id='cboHSSearchBy']"));
var typeSelect = new SelectElement(typeElement);
typeSelect.SelectByValue("JudicialOfficer");
typeElement.Click();
}
}
}
what exactly is the error? I can only assume that it is taking time to find element.
add wait time maybe? also, why using xpath when you have id of controls? id is quicker!
new WebDriverWait(driver, TimeSpan.FromSeconds(10)).Until(SeleniumExtras.WaitHelpers.ExpectedConditions.ElementExists((By.Id("cboHSSearchBy"))));

Button is not clickable on webpage

I had asked a question some time back and I am still facing random errors trying to parse a webpage.
The scenario is that the system goes to https://www.sprouts.com/store/tx/plano/plano/ clicks on "VIEW THIS STORE’S SPECIALS" navigates to https://shop.sprouts.com/shop/flyer and extracts the stores specials. Currently the code below works 10% or 20% of the times only as it is unable to find the button to click and navigate to the next page.
What am i doing wrong?
using Microsoft.VisualStudio.TestTools.UnitTesting;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Support.UI;
using System;
using System.IO;
using System.Linq;
using System.Reflection;
using SeleniumExtras.WaitHelpers;
[TestClass]
public class UnitTest1
{
ChromeDriver driver;
WebDriverWait webDriverWait;
[TestInitialize]
public void Startup()
{
var chromeOptions = new ChromeOptions();
//chromeOptions.AddArguments("headless");
chromeOptions.AddArguments("--proxy-server='direct://'");
chromeOptions.AddArguments("--proxy-bypass-list=*");
//chromeOptions.AddUserProfilePreference("disable-popup-blocking", "true");
//chromeOptions.AddArguments("--disable-extensions");
chromeOptions.AddArguments("--start-maximized");
var path = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
ChromeDriverService chromeDriverService = ChromeDriverService.CreateDefaultService(path);
driver = new ChromeDriver(chromeDriverService, chromeOptions);
webDriverWait = new WebDriverWait(driver, TimeSpan.FromSeconds(30));
}
[TestCleanup]
public void CleanUp()
{
driver.Quit();
}
[TestMethod]
public void GetSproutsWeeklyAdDetails()
{
try
{ driver.Navigate().GoToUrl("http://www.sprouts.com/store/tx/plano/plano/");
}
catch (TimeoutException timeoutException)
{
driver.Navigate().Refresh();
}
webDriverWait.Until(driver1 => ((IJavaScriptExecutor)driver).ExecuteScript("return document.readyState").Equals("complete"));
**var elements1 = webDriverWait.Until(ExpectedConditions.VisibilityOfAllElementsLocatedBy(
By.XPath("//div[#class='cell small-6 divider']/button")));
elements1.First().Click();**
<= the system is unable to find the button 80% of the times
webDriverWait.Until(driver1 => ((IJavaScriptExecutor)driver).ExecuteScript("return document.readyState").Equals("complete"));
var elements2 = webDriverWait.Until(ExpectedConditions.VisibilityOfAllElementsLocatedBy(
By.XPath("//li[#class='cell-wrapper' and #ng-repeat='item in items track by $index']")));
//More code below
}
}
}
source code of area where button that is not clickable:
<div class="cell small-6 divider">
<button onclick="viewStoreFlyer(event, 101)">
<img src="https://www.sprouts.com/wp-content/themes/FoundationPress/dist/assets/images/weekly-specials-stores-icon.svg" width="32" alt="" role="presentation">
<br>
View this store’s specials
</button>
</div>
In my perpesctive the code is almost good, except two things. You are waiting for all elements to be visible and then immediately want to click on the first of them. Firstly on the website is only one element with following xPath, so there is no need to locate a list. The second is - when element is visible, it does not means it is clickable, so the better way to deal with this would be:
webDriverWait.Until(ExpectedConditions.ElementToBeClickable(By.XPath("//div[#class='cell small-6 divider']/button")));
PS: the answer #DebanjanB has provided is very good in that case, since you just wanted to extract the text withoun interacting with element. In our case we have to wait until elelment will be ready to recieve a click, that's why ElementToBeClickable is better in this case.
I was able to get this working by adding a thread sleep just before the button was clicked.
var elements1 = webDriverWait.Until(ExpectedConditions.ElementToBeClickable(
By.XPath("//div[#class='cell small-6 divider']/button")));
Thread.Sleep(2000);
elements1.Click();

How do I use Selenium in C#?

Selenium.
I downloaded the C# client drivers and the IDE. I managed to record some tests and successfully ran them from the IDE. But now I want to do that using C#. I added all relevant DLL files (Firefox) to the project, but I don't have the Selenium class. Some Hello, World! would be nice.
From the Selenium Documentation:
using OpenQA.Selenium.Firefox;
using OpenQA.Selenium;
class GoogleSuggest
{
static void Main(string[] args)
{
IWebDriver driver = new FirefoxDriver();
//Notice navigation is slightly different than the Java version
//This is because 'get' is a keyword in C#
driver.Navigate().GoToUrl("http://www.google.com/");
IWebElement query = driver.FindElement(By.Name("q"));
query.SendKeys("Cheese");
System.Console.WriteLine("Page title is: " + driver.Title);
driver.Quit();
}
}
Install the NuGet packet manager
Download link: https://visualstudiogallery.msdn.microsoft.com/27077b70-9dad-4c64-adcf-c7cf6bc9970c
Create a C# console application
Right-click on the project → Manage NuGet Packages.
Search for "Selenium" and install package Selenium.Support.
You are done now, and you are ready to write your code :)
For code with Internet Explorer, download the Internet Explorer driver.
Link: http://selenium-release.storage.googleapis.com/index.html
Open 2.45 as its the latest release
Download IEDriverServer_x64_2.45.0.zip or IEDriverServer_Win32_2.45.0.zip
Extract and simply paste the .exe file at any location, for example C:\
Remember the path for further use.
Overall reference link: Selenium 2.0 WebDriver with Visual Studio, C#, & IE – Getting Started
My sample code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OpenQA.Selenium;
using OpenQA.Selenium.Support.UI;
using OpenQA.Selenium.IE;
namespace Selenium_HelloWorld
{
class Program
{
static void Main(string[] args)
{
IWebDriver driver = new InternetExplorerDriver("C:\\");
driver.Navigate().GoToUrl("http://108.178.174.137");
driver.Manage().Window.Maximize();
driver.FindElement(By.Id("inputName")).SendKeys("apatra");
driver.FindElement(By.Id("inputPassword")).SendKeys("asd");
driver.FindElement(By.Name("DoLogin")).Click();
string output = driver.FindElement( By.XPath(".//*[#id='tab-general']/div/div[2]/div[1]/div[2]/div/strong")).Text;
if (output != null )
{
Console.WriteLine("Test Passed :) ");
}
else
{
Console.WriteLine("Test Failed");
}
}
}
}
To set up the IDE for Selenium in conjunction with C# is to use Visual Studio Express. And you can use NUnit as the testing framework. The below links provide you more details. It seems you have set up what is explained in the first link. So check the second link for more details on how to create a basic script.
How to setup C#, NUnit and Selenium client drivers on Visual Studio Express for Automated tests
Creating a basic Selenium web driver test case using NUnit and C#
Sample code from the above blog post:
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
// Step a
using OpenQA.Selenium;
using OpenQA.Selenium.Support;
using OpenQA.Selenium.Firefox;
using NUnit.Framework;
namespace NUnitSelenium
{
[TestFixture]
public class UnitTest1
{
[SetUp]
public void SetupTest()
{
}
[Test]
public void Test_OpeningHomePage()
{
// Step b - Initiating webdriver
IWebDriver driver = new FirefoxDriver();
// Step c: Making driver to navigate
driver.Navigate().GoToUrl("http://docs.seleniumhq.org/");
// Step d
IWebElement myLink = driver.FindElement(By.LinkText("Download"));
myLink.Click();
// Step e
driver.Quit();
)
}
}
One of the things that I had a hard time finding was how to use PageFactory in C#. Especially for multiple IWebElements. If you wish to use PageFactory, here are a few examples. Source: PageFactory.cs
To declare an HTML WebElement, use this inside the class file.
private const string _ID ="CommonIdinHTML";
[FindsBy(How = How.Id, Using = _ID)]
private IList<IWebElement> _MultipleResultsByID;
private const string _ID2 ="IdOfElement";
[FindsBy(How = How.Id, Using = _ID2)]
private IWebElement _ResultById;
Don't forget to instantiate the page object elements inside the constructor.
public MyClass(){
PageFactory.InitElements(driver, this);
}
Now you can access that element in any of your files or methods. Also, we can take relative paths from those elements if we ever wish to. I prefer pagefactory because:
I don't ever need to call the driver directly using driver.FindElement(By.Id("id"))
The objects are lazy initialized
I use this to write my own wait-for-elements methods, WebElements wrappers to access only what I need to expose to the test scripts, and helps keeps things clean.
This makes life a lot easier if you have dynamic (autogerated) webelements like lists of data. You simply create a wrapper that will take the IWebElements and add methods to find the element you are looking for.
FirefoxDriverService service = FirefoxDriverService.CreateDefaultService(#"D:\DownloadeSampleCode\WordpressAutomation\WordpressAutomation\Selenium", "geckodriver.exe");
service.Port = 64444;
service.FirefoxBinaryPath = #"C:\Program Files (x86)\Mozilla Firefox\firefox.exe";
Instance = new FirefoxDriver(service);
C#
First of all, download Selenium IDE for Firefox from the Selenium IDE.
Use and play around with it, test a scenario, record the steps, and then export it as a C# or Java project as per your requirement.
The code file contains code something like:
using System;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
// Add this name space to access WebDriverWait
using OpenQA.Selenium.Support.UI;
namespace MyTest
{
[TestClass]
public class MyTest
{
public static IWebDriver Driver = null;
// Use TestInitialize to run code before running each test
[TestInitialize()]
public void MyTestInitialize()
{
try
{
string path = Path.GetFullPath(""); // Copy the Chrome driver to the debug
// folder in the bin or set path accordingly
Driver = new ChromeDriver(path);
}
catch (Exception ex)
{
string error = ex.Message;
}
}
// Use TestCleanup to run code after each test has run
[TestCleanup()]
public void MyCleanup()
{
Driver.Quit();
}
[TestMethod]
public void MyTestMethod()
{
try
{
string url = "http://www.google.com";
Driver.Navigate().GoToUrl(url);
IWait<IWebDriver> wait = new WebDriverWait(Driver, TimeSpan.FromSeconds(30.00)); // Wait in Selenium
wait.Until(ExpectedConditions.PresenceOfAllElementsLocatedBy(By.XPath(#"//*[#id='lst - ib']")));
var txtBox = Driver.FindElement(By.XPath(#"//*[#id='lst - ib']"));
txtBox.SendKeys("Google Office");
var btnSearch = Driver.FindElement(By.XPath("//*[#id='tsf']/div[2]/div[3]/center/input[1]"));
btnSearch.Click();
System.Threading.Thread.Sleep(5000);
}
catch (Exception ex)
{
string error = ex.Message;
}
}
}
}
You need to get the Chrome driver from here.
You need to get NuGet packages and necessary DLL files for the Selenium NuGet website.
You need to understand the basics of Selenium from the Selenium documentation website.
That's all...
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using OpenQA.Selenium;
using OpenQA.Selenium.Interactions;
using OpenQA.Selenium.Support.UI;
using SeleniumAutomationFramework.CommonMethods;
using System.Text;
[TestClass]
public class SampleInCSharp
{
public static IWebDriver driver = Browser.CreateWebDriver(BrowserType.chrome);
[TestMethod]
public void SampleMethodCSharp()
{
driver.Manage().Timeouts().ImplicitlyWait(TimeSpan.FromSeconds(5));
driver.Url = "http://www.store.demoqa.com";
driver.Manage().Window.Maximize();
driver.FindElement(By.XPath(".//*[#id='account']/a")).Click();
driver.FindElement(By.Id("log")).SendKeys("kalyan");
driver.FindElement(By.Id("pwd")).SendKeys("kalyan");
driver.FindElement(By.Id("login")).Click();
WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(10));
IWebElement myDynamicElement = wait.Until<IWebElement>(d => d.FindElement(By.LinkText("Log out")));
Actions builder = new Actions(driver);
builder.MoveToElement(driver.FindElement(By.XPath(".//*[#id='menu-item-33']/a"))).Build().Perform();
driver.FindElement(By.XPath(".//*[#id='menu-item-37']/a")).Click();
driver.FindElement(By.ClassName("wpsc_buy_button")).Click();
driver.FindElement(By.XPath(".//*[#id='fancy_notification_content']/a[1]")).Click();
driver.FindElement(By.Name("quantity")).Clear();
driver.FindElement(By.Name("quantity")).SendKeys("10");
driver.FindElement(By.XPath("//*[#id='checkout_page_container']/div[1]/a/span")).Click();
driver.FindElement(By.ClassName("account_icon")).Click();
driver.FindElement(By.LinkText("Log out")).Click();
driver.Close();
}
}
You will need to install Microsoft Visual Studio community Edition
Create a new project as Test Project of C#
Add Selenium references from the NuGet Package Manager. Then you will be all set.
Create a new class and use [Test Class] and [Test Method] annotations to run your script
You can refer to Run Selenium C# | Setup Selenium and C# | Configure Selenium C# for more details.
Use the below code once you've added all the required C# libraries to the project in the references.
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
namespace SeleniumWithCsharp
{
class Test
{
public IWebDriver driver;
public void openGoogle()
{
// creating Browser Instance
driver = new FirefoxDriver();
//Maximizing the Browser
driver.Manage().Window.Maximize();
// Opening the URL
driver.Navigate().GoToUrl("http://google.com");
driver.FindElement(By.Id("lst-ib")).SendKeys("Hello World");
driver.FindElement(By.Name("btnG")).Click();
}
static void Main()
{
Test test = new Test();
test.openGoogle();
}
}
}

Categories

Resources