Selenium WebDriver - Unable to locate element exception

Question

I am trying to take some scores from websites while using webdriver. I tried so far XPath, CSS, Classname but, sometimes it is located the item, sometimes it does not.

This is the HTML code that I have been trying to take it:

<td class="score" rowspan="6"><span class="p1_home">0</span> - <span class="p1_away">0</span></td>

And this is my code (that i tried so far) :

firstHalf[i] = Driver.FindElement(By.XPath("//*[@id=\"parts\"]/tbody/tr[2]/td[2]")).Text;

Other versions :

 firstHalf[i] = Driver.FindElement(By.CssSelector("#parts > tbody > tr:nth-child(2) > td.score")).Text;
 firstHalf[i] = Driver.FindElement(By.ClassName("score")).Text;

And also I tried the child classes (under score classes), but the result is same, sometimes can be located the element, sometimes it cannot.

Any suggestion?

Update : To my code, I put some wait or Thread.Sleep still will not work.

for (int r = 0; r < 10; r++)
                {
                    try
                    {
                        string d1 = Driver.FindElement(By.XPath("//span[@class='p1_home']")).Text;
                        string d2 = Driver.FindElement(By.XPath("//span[@class='p1_away']")).Text;
                        //firstHalf[i] = firstHalf[i].Replace(" ", "");
                        firstHalf[i] = d1 + "-" + d2;
                        break;
                    }
                    catch (Exception e)
                    {
                        Thread.Sleep(300);
                        r -= 1;
                        eventCounter++;
                        if (eventCounter == 10)
                        {
                            errorMsg.sendErrMsg(e);
                            //errorMsg.stopProgram();
                        }
                    }
                }

@iamsankalp89 I want to locate class score or child classes and these are p1_home and p1_away — Kaan Taha Köken
– Kaan Taha Köken, Commented Sep 16, 2017 at 11:01
You'd better use ExpectedConditions class instead of sleeping. In that case webdriver will check every 0.5 sec if element is loaded and will fetch it as soon as it appears. — Yevgen
– Yevgen, Commented Sep 16, 2017 at 12:08
It seems like the page you are using has some js which modifies the html. How to wait for pages to load this type of content is certainly a point of discussion among automation / test devs. — kpie
– kpie, Commented Sep 16, 2017 at 12:10

iamsankalp89 · Accepted Answer · 2017-09-16 11:02:45Z

1

You can use

//span[@class='p1_home']

//span[@class='p1_away']

answered Sep 16, 2017 at 11:02

iamsankalp89

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4 Comments

Kaan Taha Köken Over a year ago

I am trying write now, and I will test whether the program crash or not

iamsankalp89 Over a year ago

Ok try and let me know what happens

Kaan Taha Köken Over a year ago

Okay, I tried it. On the first run, it worked perfectly, but on the second run, it crashed

iamsankalp89 Over a year ago

Give some wait and then try

Yevgen · Accepted Answer · 2017-09-16 12:00:42Z

1

To locate element of particular class and attribute you can use CSS selector. For example:

Driver.FindElement(By.CssSelector(".score[rowspan='6']")).Text;

In case you having trouble to locate element reliably, you might want get it after certain conditions are met, like so:

WebDriverWait wait = new WebDriverWait(Driver, TimeSpan.FromSeconds(30));
IWebElement element = wait.Until(ExpectedConditions.ElementIsVisible(By.CssSelector(".score[rowspan='6']")));

edited Sep 16, 2017 at 12:00

answered Sep 16, 2017 at 11:07

Yevgen

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2 Comments

Kaan Taha Köken Over a year ago

I am testing other solution. I will let you know whether works or not later

Yevgen Over a year ago

Added alternative option, to address possible loading time issues.

Kaan Taha Köken · Accepted Answer · 2017-10-03 15:08:29Z

Okay, I found a solution with a different approach. Instead of getting two specific class, I used parent class score. Also, I deleted the "for loop" and "try" and "catch" which I am using for finding the object again and again.

To my main loop, I added "try" and "catch". When I got the exception, I decreased the loop counter, closed the window and opened again. Also, I added some Thread.Sleep in order not to get errors because Web-Driver acts so fast this causes a problem.

Updated Version of my Code:

for (int i = 0;; i < stopLimit.Count; i++)
{
     try
     {
          Thread.Sleep(500);
          string score = Driver.FindElementByCssSelector("#parts > tbody > 
                                                   tr:nth-child(2) > td.score").Text;
          firstHalf[i] = score.Replace(" ", "");
     }
     catch(Exception)  
     {
          i--;
          Thread.Sleep(1500);
          Driver.SwitchTo().Window(Driver.WindowHandles.Last());
          Driver.Close();
          Driver.SwitchTo().Window(Driver.WindowHandles.First());
     }
}

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