Question

我有一个从AutomationPattern方法检索到的AutomationElement.GetSupportedPatterns()个对象的列表。现在我需要知道哪种模式，我的意思是单项InvokePattern或ExpandCollapsePattern。更具体地说，假设我们有一个AutomationPattern对象，并且我们知道该对象的ProgrammaticName属性是“InvokePatternIdentifiers.Pattern”字符串，我可以以某种方式获得类型为InvokePattern的对象？

我已经使用AutomationPattern.ProgrammaticName属性和一个大的switch语句实现了我自己解决这个问题的方法，还有另外一种方法吗？

这是我的实现：

    public object GetActualAutomationPattern(AutomationElement element, AutomationPattern pattern)
    {
        switch (pattern.ProgrammaticName)
        {
            case "DockPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(DockPattern.Pattern) as DockPattern;
            case "ExpandCollapsePatternIdentifiers.Pattern":
                return element.GetCurrentPattern(ExpandCollapsePattern.Pattern) as ExpandCollapsePattern;
            case "GridPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(GridPattern.Pattern) as GridPattern;
            case "GridItemPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(GridItemPattern.Pattern) as GridItemPattern;
            case "InvokePatternIdentifiers.Pattern":
                return element.GetCurrentPattern(InvokePattern.Pattern) as InvokePattern;
            case "MultipleViewPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(MultipleViewPattern.Pattern) as MultipleViewPattern;
            case "RangeValuePatternIdentifiers.Pattern":
                return element.GetCurrentPattern(RangeValuePattern.Pattern) as RangeValuePattern;
            case "ScrollPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(ScrollPattern.Pattern) as ScrollPattern;
            case "ScrollItemPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(ScrollItemPattern.Pattern) as ScrollItemPattern;
            case "SelectionPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(SelectionPattern.Pattern) as SelectionPattern;
            case "SelectionItemPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(SelectionItemPattern.Pattern) as SelectionItemPattern;
            case "TablePatternIdentifiers.Pattern":
                return element.GetCurrentPattern(TablePattern.Pattern) as TablePattern;
            case "TableItemPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(TableItemPattern.Pattern) as TableItemPattern;
            case "TogglePatternIdentifiers.Pattern":
                return element.GetCurrentPattern(TogglePattern.Pattern) as TogglePattern;
            case "TransformPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(TransformPattern.Pattern) as TransformPattern;
            case "ValuePatternIdentifiers.Pattern":
                return element.GetCurrentPattern(ValuePattern.Pattern) as ValuePattern;
            case "WindowPatternIdentifiers.Pattern":
                return element.GetCurrentPattern(WindowPattern.Pattern) as WindowPattern;
            default:
                return pattern;
        }
    }

Answer 1

您可以执行以下操作：

object patternObj = element.TryGetCurrentPattern(pattern);

然后只测试该类型是否符合您的要求：

if (patternObj != null && patternObj is InvokePattern) {...}

Answer 2

我希望这会对你有所帮助。

/// <summary>  
/// Gets the toggle state of an element in the target application.  
/// </summary> 
/// <param name="element">The target element.</param>  

private bool IsElementToggledOn(AutomationElement element)
{
if (element == null)
{
    // TODO: Invalid parameter error handling. 
    return false;
}

Object objPattern;
TogglePattern togPattern;
if (true == element.TryGetCurrentPattern(TogglePattern.Pattern, out objPattern))
{
    togPattern = objPattern as TogglePattern;
    return togPattern.Current.ToggleState == ToggleState.On;
}
// TODO: Object doesn't support TogglePattern error handling. 
return false;
}

我是从here

取得的

从AutomationPattern对象列表中获取实际的InvokePattern对象

2 个答案: