如何从UIAutomation获取隐藏/私有UI元素,我可以在Spy ++中看到它,但无法在代码中找到它,只有它的父母和兄弟姐妹

问题描述 投票:0回答:1

我正在尝试使用System.Windows.Automation来访问VLC媒体播放器中的UI元素(特别是最左边角落的状态框,显示当前正在播放的视频的文件名)。我可以获取父元素和兄弟元素,但在Spy ++中,所有在它们旁边都有一个暗淡图标的元素我无法在代码中到达...我假设暗淡的图标意味着它们是私有的或隐藏的或类似的东西。这是一张显示我的意思的图片:

enter image description here

请注意,我有一个带有句柄0x30826的父对象的引用,我从那里做了一个FindAll()*并且只得到一个结果,即对句柄为0x30858的子进程的引用。你可以在Spy ++中看到有5个孩子的0x30826,但只有其中一个,我在做FindAll时得到的,有一个全黑的图标,其他的有一个灰色图标,我无法找到它们。另请注意,我想要的是0x20908,它有一个灰色图标......

我怎样才能在代码中找到它?

*这是我用来尝试获取0x30826的所有子代的代码:

    Dim aeDesktop As AutomationElement
    Dim aeVLC As AutomationElement
    Dim c As AutomationElementCollection
    Dim cd As New AndCondition(New PropertyCondition(AutomationElement.IsEnabledProperty, True), New PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.StatusBar))

    aeVLC = aeDesktop.FindFirst(TreeScope.Children, New PropertyCondition(AutomationElement.NameProperty, "got s01e01.avi - VLC media player"))

    c = aeVLC.FindAll(TreeScope.Children, cd)

    c = c(0).FindAll(TreeScope.Children, Condition.TrueCondition)

第一个FindAll()只给我0x30826,这很好,因为这就是我想要的,但是没有指定条件的第二个FindAll只给出0x30858,当我在Spy ++中看到加上4个其他时,包括我想要的那个。

windows vb.net ui-automation spy++
1个回答
1
投票

你真的在使用Spy ++代替Inspect Program来阻碍你的努力。使用Inspect,您可以轻松地看到目标元素是一个文本元素,该元素是作为主窗口元素父级的状态栏元素的父级。

VLC in Inspect

使用该信息,获得对目标文本元素的引用是直截了当的。首先获取主窗口,然后是状态栏,最后是状态栏的第一个文本元素。

' find the VLC process 
Dim targets As Process() = Process.GetProcessesByName("vlc")

If targets.Length > 0 Then

    ' assume its the 1st process 
    Dim vlcMainWindowHandle As IntPtr = targets(0).MainWindowHandle

    ' release all processes obtained
    For Each p As Process In targets
        p.Dispose()
    Next

    ' use vlcMainWindowHandle to get application window element
    Dim vlcMain As AutomationElement = AutomationElement.FromHandle(vlcMainWindowHandle)

    ' get the statusbar
    Dim getStatusBarCondition As Condition = New PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.StatusBar)
    Dim statusBar As AutomationElement = vlcMain.FindFirst(TreeScope.Children, getStatusBarCondition)

    ' get the 1st textbox in the statusbar
    Dim getTextBoxCondition As Condition = New PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Text)
    Dim targetTextBox As AutomationElement = statusBar.FindFirst(TreeScope.Children, getTextBoxCondition)

    ' normally you use either a TextPattern.Pattern or ValuePattern.Pattern
    ' to obtain the text, but this textbox exposes neither and it uses the
    ' the Name property for the text.

    Dim textYouWant As String = targetTextBox.Current.Name

End If
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