selecting combobox item using ui automation

Question

how do I select ComboBox\'s SelectedIndex = -1?

I wrote a code to automate testing:

AutomationElement aeBuildMachine = null;
int count =         


        

Answer 1

There isn't a big change but only a few to notice,

1. Don't need to use collapse pattern, calling expand will do the trick for you.
2. Using treescope.subtree worked for me instead of children.

The code sample would be like this,

public static void SelectValueInComboBox(string comboBox, string value)
{
    var comboBoxElement = HelperMethods.FindElementFromAutomationID(comboBox);
    if (comboBoxElement == null)
        throw new Exception("Combo Box not found");

    ExpandCollapsePattern expandPattern = (ExpandCollapsePattern)comboBoxElement.GetCurrentPattern(ExpandCollapsePattern.Pattern);

    AutomationElement comboboxItem = comboBoxElement.FindFirst(TreeScope.Subtree, new PropertyCondition(AutomationElement.NameProperty, value));

    SelectionItemPattern selectPattern = (SelectionItemPattern)comboboxItem.GetCurrentPattern(SelectionItemPattern.Pattern);
    selectPattern.Select();
}