Please note, that we are not aware of such exception. I'm attaching to my reply a sample application and a Coded UI project where we have tested this scenario. In the Coded UI test recorded via the Coded UI recorder
the drop down of the ComboBox is clicked in order to open\expand it.
in the sample application
you can find a button that expands ComboBox via the UIAutomation ExpandCollapse
pattern. Furthermore, we have tested it with UISpy
and UI Verify
, but we were not able to reproduce the exception.
So it would be great if you could check the attached project and let us know if we are not missing something. If that is the case it would be great if you could provide us with more information on the matter as sample project would be of great help.
Also, can you confirm that you are using 2016.1 217
version of the controls and for Coded UI you have reference to the ExtensionsCore.dll
assembly as shown in this help
Hope this would help.
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