使用UI自动化以编程方式打开上下文菜单

时间:2010-01-05 19:03:32

标签: c# automation contextmenu routedevent

我正在尝试使用UI自动化实现右键单击上下文菜单。由于UI自动化没有本机右键单击模式,因此我将ExpandCollapse提供程序添加到listview的AutomationPeer类,并将展开和折叠映射到打开和关闭上下文菜单。

我的问题是,是否有一种更好的方法来调用上下文菜单,而不涉及尝试使用私有构造函数实例化一个类?我不能使用Shift-F10的SendKeys。我想使用PopupControlService,但标记为内部。

我糟糕的解决方法:

public class MyListViewAutomationPeer : ListViewAutomationPeer, IExpandCollapseProvider
{

    public MyListViewAutomationPeer(MyListView owner)
        : base(owner){}

    public override object GetPattern(PatternInterface patternInterface)
    {
        if (patternInterface == PatternInterface.ExpandCollapse)
        {
            return this;
        }
        return base.GetPattern(patternInterface);
    }

    public void Expand()
    {
        MyListView owner = (MyListView)Owner;

        //**********************
        //Ouch!!! What a hack
        //**********************

        //ContextMenuEventArgs is a sealed class, with private constructors
        //Instantiate it anyway ...
        ContextMenuEventArgs cmea = (ContextMenuEventArgs)FormatterServices.GetUninitializedObject(typeof(ContextMenuEventArgs));
        cmea.RoutedEvent = MyListView.ContextMenuOpeningEvent;
        cmea.Source = owner;

        //This will fire any developer code that is bound to the OpenContextMenuEvent
        owner.RaiseEvent(cmea);

        //The context menu didn't open because this is a hack, so force it open
        owner.ContextMenu.Placement = PlacementMode.Center;
        owner.ContextMenu.PlacementTarget = (UIElement)owner;
        owner.ContextMenu.IsOpen = true;

    }

1 个答案:

答案 0 :(得分:0)

我也在努力解决同样的问题。作为解决方法,我使用user32.dll使用mouse_event函数,并在获取可点击区域的X,Y坐标后执行右键单击。

这不是一个好方法,因为屏幕的X,Y坐标会随屏幕分辨率而变化。