Error - No Such Element Exception - when using ImplicityWait

Question

Error - Not Visible Exception Was Unhandled Error - No Such Element Exception

Here is the code. I have attached the image of the error message:

using System;
using System.Collections.Generic;
using System.Linq;
using NUnit.Framework;
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
using System.Text;
using System.Threading.Tasks;
namespace BBC_W_FCast_New_01
{
 class Program
 {
 static void Main(string[] args)
 {
 //Instantiate Firefox Driver
 var driver = new FirefoxDriver();
 driver.Navigate().GoToUrl("http://www.bbc.co.uk/weather");
 //Using the 'Find a Forecast' search field to get the weather in 'Reading, UK'
 var user = driver.FindElement(By.Id("locator-form-search"));
 //Use "Reading, Reading" to avoid ambiguity. There is a location called Reading in USA
 user.SendKeys("Reading, Reading");
 //Click on Search button
 driver.FindElement(By.Id("locator-form-submit")).Click();
 driver.Manage().Timeouts().ImplicitlyWait(TimeSpan.FromSeconds(10));
 //Click on Table button
 driver.FindElement(By.XPath(".//*[@id='hourly']/div[3]/table/tfoot/tr[3]/td[10]")).Click();
 //Obtaining pressure For 2100 hours today
 driver.FindElement(By.XPath(".//*[@id='hourly']/div[3]/table/tfoot/tr[3]/td[10]")).Click();
 //Obtain pressure for 2100 Hours tomorrow
 driver.FindElement(By.XPath(".//*[@id='hourly']/div[3]/table/tfoot/tr[3]/td[16]")).Click();
 //Subtract the two values above and then 'echo' the result in Selenium
 int val1 = Int32.Parse(driver.FindElement(By.XPath(".//*[@id='hourly']/div[3]/table/tfoot/tr[3]/td[16]")).Text);
 int val2 = Int32.Parse(driver.FindElement(By.XPath(".//*[@id='hourly']/div[3]/table/tfoot/tr[3]/td[10]")).Text);
 int difference = val1 - val2;
System.Console.WriteLine("Difference is: " + difference);

---

In Java & they do not offer good enough answers:

• Selenium Webdriver: No such element exception even though element gets available after waiting for some time
• https://stackoverflow.com/questions/20903231/how-to-wait-until-an-element-is-present-in-selenium

---

I get an error message on adding this code:

WebDriverWait wait = new WebDriverWait(driver, 30);
wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("locator")));

I have added an internal class. But I am getting the error:

"An unhandled exception of type 'System.NotImplementedException' occurred in BBC_W_FCast_New_01.exe Additional information: The method or operation is not implemented."

The error comes from this particular line of code:

throw new NotImplementedException();

Here is the class:

internal class WebDriverWait
{
 private FirefoxDriver driver;
 private TimeSpan timeSpan;
 public WebDriverWait(FirefoxDriver driver, TimeSpan timeSpan)
 {
 this.driver = driver;
 this.timeSpan = timeSpan;
 }
 internal IWebElement Until(object p)
 {
 throw new NotImplementedException();
 }
}

}

• FDM: Either your locator is wrong or you need to use ExplicitWait, as already answered.
• OA345: I have used the explicit wait. But I still get errors. I have added an internal class: internal class WebDriverWait { private FirefoxDriver driver; private TimeSpan timeSpan; public WebDriverWait(FirefoxDriver driver, TimeSpan timeSpan) { this.driver = driver; this.timeSpan = timeSpan; } internal IWebElement Until(object p) { throw new NotImplementedException(); } } }

Answer 1

I recommend you switch from ImplicitlyWait to Explicitly wait for the element you want as detailed at http://www.seleniumhq.org/docs/04_webdriver_advanced.jsp

Example:

WebDriver driver = new FirefoxDriver();
driver.get("http://somedomain/url_that_delays_loading");
WebElement myDynamicElement = (new WebDriverWait(driver, 10))
 .until(ExpectedConditions.presenceOfElementLocated(By.id("myDynamicElement")));

• OA345: I added an explicit Wait. But I get an error message. I have added it above. The information from my research is not clear to be honest. I have tried adding Selenium Wait classes to my project & I get the same error. What are your thoughts, please.
• Michael Durrant: I see the code but not what error message you are getting? Also please consider posing this as additional / separate question rather than changing original. We want the question and answer to be clear and helpful for others that run into the same situation.
• OA345: The error is: "ElementNotVisible Exception Was Unhandled". I added the question to the one below that which I posted earlier. I actually did not change the original. A screen shot of the error message is the first one at the top of the web page. Thank you very much.