Why does the WaitForControlExist() function returned 'false' during the Coded UI project running the second test case?

Question

Hi All,

I have run into a problem during running Coded UI project.

The WaitForControlExist() function returned 'false' to check whether the UI Control is existing or not during the Coded UI project running the second test case(suppose the second test case is same as the first test case). In fact, the UI Control was existed.

See my code as following:

public void signIn(string strUserName, string strUserNamePassowrd)

{

#region Variable Declarations

HtmlEdit uIWindowsLiveIDEdit = this.UIWelcometoWindowsLiveWindow1.UIWelcometoWindowsLiveDocument.UIWindowsLiveIDEdit;

HtmlEdit uIPasswordEdit = this.UIWelcometoWindowsLiveWindow1.UIWelcometoWindowsLiveDocument.UIPasswordEdit;

HtmlInputButton uISigninButton = this.UIWelcometoWindowsLiveWindow1.UIWelcometoWindowsLiveDocument.UISigninButton;

#endregion

bool exist = uIWindowsLiveIDEdit .WaitForControlExist();

if (exist)

{

// Type 'XXXXXX' in 'Windows Live ID:' text box

uIWindowsLiveIDEdit.Text = strUserName;

// Type '{Tab}' in 'Windows Live ID:' text box

Keyboard.SendKeys(uIWindowsLiveIDEdit, this.signInAnswersWin2008R2Params.UIWindowsLiveIDEditSendKeys, ModifierKeys.None);

// Type '********' in 'Password:' text box

uIPasswordEdit.Password = strUserNamePassowrd;

// Click 'Sign in' button

Mouse.Click(uISigninButton, new Point(36, 9));

}

}

then the value of exist is 'true' during running the first test case, but it is 'false' during running the second test case.

In addition, if I checked that control whether is existing or not by using

bool browserExist = this.UIWelcometoWindowsLiveWindow1.WaitForControlExist();

it will prompt the error message: 'COM object that has been separated from its underlying RCW cannot be used.'  during running the second test case.

But, it can be continue running the following steps(input username&password) without any errors during running the second test case if I was not using WaitForControlExist() function to check that UI control.

 

So, my question is that why does the WaitForControlExist() function returned 'false' during the Coded UI project running the second test case? And in this case, which function should to be used to check one UI Control is existing or not?

 

BTW, my testing environment is:

OS: windows2008R2

VS2010 Ultimate with Feature Pack2

.NET4.0

IE8.0,

And I found that it is the same issue if it is running on the Windows7 & IE9 box

Answer 1

Hi,

I've recorded the same scenario in Windows 7 & IE8 box. However, i'm not able to replicate the error.

Anyways,

try the following code, to verify whether  'uIWindowsLiveIDEdit'  exists or not

 

if (uIWindowsLiveIDEdit.Exists)

            {

 

            }

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Thanks, Narasimha... Please mark it as answer, if this reply answerd your question

Answer 2

Hi,

    Thank you for your reply.

    And it was the same issue by using 'Exists' property to check that UI Control status.

    The 'Exists' property also returned 'false' during the Coded UI project running the second test case.

Answer 3

Hi AlexZhu,

 

Thank you for posting in the MSDN forum.

 

Tapas wrote a blog, it told about how to validate the control’s existence and the WaitForReady Issues, see http://blogs.msdn.com/b/tapas_sahoos_blog/archive/2011/11/07/troubleshooting-record-and-playback-issues-in-coded-ui-test.aspx.

 

The error message: 'COM object that has been separated from its underlying RCW cannot be used.'

 

I find two useful threads, see:

http://social.msdn.microsoft.com/Forums/ar-SA/vsautotest/thread/628ff454-68b5-41dd-a709-498f197a1b5d

http://social.msdn.microsoft.com/Forums/en-US/vsautotest/thread/90974f08-dce9-41c3-a323-87771e69dfff

Hope it can help.

 

If no helps, please attach your Visual Studio project or a simple similar App, you can upload it to the sky driver, and then share the download link in your post. You can post the steps about recording the UI test in your reply. We try to record the same UI test and check it.

 

If there's any concern, please feel free to let us know.

 

Have a nice day,

---

Jack Zhai [MSFT]
MSDN Community Support | Feedback to us

Answer 4

Hi AlexZhu,

 

I am writing to check the status of the issue on your side.

What about this problem now?

Would you mind letting us know the result of the suggestion?

 

Best Regards,

---

Jack Zhai [MSFT]
MSDN Community Support | Feedback to us