使用UI自动化更改WinForms组合框选择

    public static void ActionSelectComboBoxItem(AutomationElement comboBoxElement, int indexToSelect){
        if(comboBoxElement == null)
            throw new Exception("Combo Box not found");

        //Get the all the list items in the ComboBox
        AutomationElementCollection comboboxItem = comboBoxElement.FindAll(TreeScope.Children, new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.ListItem));

        //Expand the combobox
        ExpandCollapsePattern expandPattern = (ExpandCollapsePattern)comboBoxElement.GetCurrentPattern(ExpandCollapsePattern.Pattern);
        expandPattern.Expand();

        //Index to set in combo box
        AutomationElement itemToSelect = comboboxItem[indexToSelect];

        //Finding the pattern which need to select
        SelectionItemPattern selectPattern = (SelectionItemPattern)itemToSelect.GetCurrentPattern(SelectionItemPattern.Pattern);
        selectPattern.Select();
    }

就像我的情况一样

AutomationElementCollection comboboxItem = comboBoxElement.FindAll(TreeScope.Children, new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.ListItem));

在同一个组合框中,当我使用鼠标单击展开它时,它会显示所有值。

在检索项目之前,需要展开组合框。这些项目仅在以下情况下“存在”