c# - AutomationElement 使用 Inspect.exe 显示，但在使用 UIAutomationCore.dll 或 System.Windows.Automation 时不显示

Question

TL;DR:我做错了什么导致工作区 Pane 出现在 Inspect Objects 中但没有出现在我的自定义代码中？

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我正在尝试为第 3 方程序编写一些 UI 自动化。我正在使用 Inspect.exe Windows SDK 附带的, 我都试过了 System.Windows.Automation并直接COM Calls (使用来自 UIA Verify 的包装器库)。

Process[] processes = Process.GetProcessesByName("Redacted Client");
if (processes.Length == 0) throw new Exception("Could not find \"Redacted Client\" process");

PropertyCondition parentFileCond = new PropertyCondition(AutomationElement.ProcessIdProperty, processes[0].Id);
PropertyCondition workspaceCond = new PropertyCondition(AutomationElement.NameProperty, "Workspace", PropertyConditionFlags.IgnoreCase);
PropertyCondition documentCond = new PropertyCondition(AutomationElement.NameProperty, "Untitled3", PropertyConditionFlags.IgnoreCase);

var parentElement = AutomationElement.RootElement.FindFirst(TreeScope.Children, parentFileCond);
var workspaceElement = parentElement.FindFirst(TreeScope.Children, workspaceCond); //Also does not work with TreeScope.Descendants
var documentElement = workspaceElement.FindFirst(TreeScope.Children, documentCond);

当我尝试上面的代码时，parentElement 确实具有对主程序窗口的正确引用，但是 workspaceElement 为空。

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临时解决方法:

如果我将 documentElement 代码更改为:

var documentElement = parentElement.FindFirst(TreeScope.Descendants, documentCond);

我将返回正确的元素。我可以使用它作为解决方法，因为文档窗口无论如何都是我真正想要的，但我想知道为什么工作区 Pane 不会显示，以便我可以提高我的技能，以防将来遇到这个问题我无法解决的情况。

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更新:我尝试了 MrGomez 的建议

PropertyCondition parentFileCond = new PropertyCondition(AutomationElement.ProcessIdProperty, 5872);
PropertyCondition panelCond = new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Pane);

var parentElement = AutomationElement.RootElement.FindFirst(TreeScope.Children, parentFileCond);
var panels = parentElement.FindAll(TreeScope.Children, panelCond);

我得到 3 个结果，不幸的是，我有 4 个面板，没有显示的是名为 Workspace 的面板。

我还尝试使用 TreeWalker

PropertyCondition parentFileCond = new PropertyCondition(AutomationElement.ProcessIdProperty, 5872);
PropertyCondition workspaceCond= new PropertyCondition(AutomationElement.NameProperty, "Workspace");

var walker = new TreeWalker(workspaceCond);
var parentElement = AutomationElement.RootElement.FindFirst(TreeScope.Children, parentFileCond);
var workspaceElement = walker.Normalize(parentElement);

但这也会为 workspaceElement

返回 null

无奈之下，我从Inspect中尝试了“NativeWindowHandle”的当前值，从根节点开始遍历。

PropertyCondition workspaceCond = new PropertyCondition(AutomationElement.NativeWindowHandleProperty, 0x110906);
var walker = new TreeWalker(workspaceCond);
var workspaceElement = walker.Normalize(AutomationElement.RootElement);

工作区元素仍然为空。

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找到结果

我终于让 Workspace 出现了，但我不得不执行

PropertyCondition workspaceCond = new PropertyCondition(AutomationElement.NativeWindowHandleProperty, 0x110906);
var test = AutomationElement.RootElement.FindFirst(TreeScope.Subtree, workspaceCond); 

而且运行需要相当长的时间。

旧屏幕截图

这是显示 TreeView 的 Inspect.exe 的屏幕截图。

这是程序主窗口的属性。

How found:  Selected from tree...
RuntimeId:  "[42.2557552]"
BoundingRectangle:  {l:75 t:1 r:1311 b:1003}
ProcessId:  8160
ControlType:    UIA_WindowControlTypeId (0xC370)
LocalizedControlType:   "window"
Name:   "Redacted"
AccessKey:  ""
HasKeyboardFocus:   false
IsKeyboardFocusable:    true
IsEnabled:  true
ClassName:  "C:\Program Files (x86)\RedactedProgramFiles7\RedactedClientFolder"
HelpText:   ""
IsPassword: false
NativeWindowHandle: 0x270670
IsOffscreen:    false
FrameworkId:    "Win32"
ProviderDescription:    "[pid:4000,hwnd:0x270670 Main:Nested [pid:8160,hwnd:0x270670 Annotation(parent link):Microsoft: Annotation Proxy (unmanaged:uiautomationcore.dll); Main:Microsoft: MSAA Proxy (unmanaged:uiautomationcore.dll)]; Nonclient:Microsoft: Non-Client Proxy (unmanaged:uiautomationcore.dll); Hwnd(parent link):Microsoft: HWND Proxy (unmanaged:uiautomationcore.dll)]"
Window.CanMaximize: true
Window.CanMinimize: true
Window.WindowVisualState:   Normal (0)
Window.WindowInteractionState:  ReadyForUserInteraction (2)
Window.IsModal: false
Window.IsTopmost:   false
Transform.CanMove:  true
Transform.CanResize:    true
Transform.CanRotate:    false
LegacyIAccessible.ChildId:  0
LegacyIAccessible.DefaultAction:    ""
LegacyIAccessible.Description:  ""
LegacyIAccessible.Help: ""
LegacyIAccessible.KeyboardShortcut: ""
LegacyIAccessible.Name: "Redacted"
LegacyIAccessible.Role: client (0xA)
LegacyIAccessible.State:    focusable (0x100000)
LegacyIAccessible.Value:    ""
IsDockPatternAvailable: false
IsExpandCollapsePatternAvailable:   false
IsGridItemPatternAvailable: false
IsGridPatternAvailable: false
IsInvokePatternAvailable:   false
IsLegacyIAccessiblePatternAvailable:    true
IsMultipleViewPatternAvailable: false
IsRangeValuePatternAvailable:   false
IsScrollPatternAvailable:   false
IsScrollItemPatternAvailable:   false
IsSelectionItemPatternAvailable:    false
IsSelectionPatternAvailable:    false
IsTablePatternAvailable:    false
IsTableItemPatternAvailable:    false
IsTextPatternAvailable: false
IsTogglePatternAvailable:   false
IsTransformPatternAvailable:    true
IsValuePatternAvailable:    false
IsWindowPatternAvailable:   true
IsItemContainerPatternAvailable:    false
IsVirtualizedItemPatternAvailable:  false
IsSynchronizedInputPatternAvailable:    false
FirstChild: "Workspace" pane
LastChild:  "Application" menu bar
Next:   "Inspect  (HWND: 0x01700F06)" window
Previous:   "Sandbox Console (Debugging) - Microsoft Visual Studio (Administrator)" window
Other Props:    Object has no additional properties
Children:   "Workspace" pane
    (null) title bar
    "Application" menu bar
Ancestors:  "Desktop" pane
    [ No Parent ]

这里是问题“工作区” Pane 的属性。

How found:  Selected from tree...
RuntimeId:  "[42.34146524]"
BoundingRectangle:  {l:83 t:51 r:1303 b:995}
ProcessId:  8160
ControlType:    UIA_PaneControlTypeId (0xC371)
LocalizedControlType:   "pane"
Name:   "Workspace"
AccessKey:  ""
HasKeyboardFocus:   false
IsKeyboardFocusable:    true
IsEnabled:  true
ClassName:  "MDIClient"
HelpText:   ""
IsPassword: false
NativeWindowHandle: 0x20908DC
IsOffscreen:    false
FrameworkId:    "Win32"
ProviderDescription:    "[pid:4000,hwnd:0x20908DC Main:Nested [pid:8160,hwnd:0x20908DC Annotation(parent link):Microsoft: Annotation Proxy (unmanaged:uiautomationcore.dll); Main:Microsoft: MSAA Proxy (unmanaged:uiautomationcore.dll)]; Hwnd(parent link):Microsoft: HWND Proxy (unmanaged:uiautomationcore.dll)]"
LegacyIAccessible.ChildId:  0
LegacyIAccessible.DefaultAction:    ""
LegacyIAccessible.Description:  ""
LegacyIAccessible.Help: ""
LegacyIAccessible.KeyboardShortcut: ""
LegacyIAccessible.Name: "Workspace"
LegacyIAccessible.Role: client (0xA)
LegacyIAccessible.State:    focusable (0x100000)
LegacyIAccessible.Value:    ""
IsDockPatternAvailable: false
IsExpandCollapsePatternAvailable:   false
IsGridItemPatternAvailable: false
IsGridPatternAvailable: false
IsInvokePatternAvailable:   false
IsLegacyIAccessiblePatternAvailable:    true
IsMultipleViewPatternAvailable: false
IsRangeValuePatternAvailable:   false
IsScrollPatternAvailable:   false
IsScrollItemPatternAvailable:   false
IsSelectionItemPatternAvailable:    false
IsSelectionPatternAvailable:    false
IsTablePatternAvailable:    false
IsTableItemPatternAvailable:    false
IsTextPatternAvailable: false
IsTogglePatternAvailable:   false
IsTransformPatternAvailable:    false
IsValuePatternAvailable:    false
IsWindowPatternAvailable:   false
IsItemContainerPatternAvailable:    false
IsVirtualizedItemPatternAvailable:  false
IsSynchronizedInputPatternAvailable:    false
FirstChild: "Untitled3" window
LastChild:  "Letters (32638 of 32638):" window
Next:   (null) title bar
Previous:   [null]
Other Props:    Object has no additional properties
Children:   "Untitled3" window
    "Letters (32638 of 32638):" window
Ancestors:  "Redacted" window
    "Desktop" pane
    [ No Parent ]

这里是“工作”文档窗口的属性。

How found:  Selected from tree...
RuntimeId:  "[42.9505096]"
BoundingRectangle:  {l:85 t:53 r:651 b:491}
ProcessId:  8160
ControlType:    UIA_WindowControlTypeId (0xC370)
LocalizedControlType:   "window"
Name:   "Untitled3"
AccessKey:  ""
HasKeyboardFocus:   false
IsKeyboardFocusable:    true
IsEnabled:  true
AutomationId:   "10"
ClassName:  "ProToolsSubMDIWndClass"
HelpText:   ""
IsPassword: false
NativeWindowHandle: 0x910948
IsOffscreen:    false
FrameworkId:    "Win32"
ProviderDescription:    "[pid:4000,hwnd:0x910948 Main:Nested [pid:8160,hwnd:0x910948 Annotation(parent link):Microsoft: Annotation Proxy (unmanaged:uiautomationcore.dll); Main:Microsoft: MSAA Proxy (unmanaged:uiautomationcore.dll)]; Nonclient:Microsoft: Non-Client Proxy (unmanaged:uiautomationcore.dll); Hwnd(parent link):Microsoft: HWND Proxy (unmanaged:uiautomationcore.dll)]"
Window.CanMaximize: true
Window.CanMinimize: true
Window.WindowVisualState:   Normal (0)
Window.WindowInteractionState:  ReadyForUserInteraction (2)
Window.IsModal: false
Window.IsTopmost:   false
Transform.CanMove:  true
Transform.CanResize:    true
Transform.CanRotate:    false
LegacyIAccessible.ChildId:  0
LegacyIAccessible.DefaultAction:    ""
LegacyIAccessible.Description:  ""
LegacyIAccessible.Help: ""
LegacyIAccessible.KeyboardShortcut: ""
LegacyIAccessible.Name: "Untitled3"
LegacyIAccessible.Role: client (0xA)
LegacyIAccessible.State:    focusable (0x100000)
LegacyIAccessible.Value:    ""
IsDockPatternAvailable: false
IsExpandCollapsePatternAvailable:   false
IsGridItemPatternAvailable: false
IsGridPatternAvailable: false
IsInvokePatternAvailable:   false
IsLegacyIAccessiblePatternAvailable:    true
IsMultipleViewPatternAvailable: false
IsRangeValuePatternAvailable:   false
IsScrollPatternAvailable:   false
IsScrollItemPatternAvailable:   false
IsSelectionItemPatternAvailable:    false
IsSelectionPatternAvailable:    false
IsTablePatternAvailable:    false
IsTableItemPatternAvailable:    false
IsTextPatternAvailable: false
IsTogglePatternAvailable:   false
IsTransformPatternAvailable:    true
IsValuePatternAvailable:    false
IsWindowPatternAvailable:   true
IsItemContainerPatternAvailable:    false
IsVirtualizedItemPatternAvailable:  false
IsSynchronizedInputPatternAvailable:    false
FirstChild: "" thumb
LastChild:  (null) title bar
Next:   "Letters (32638 of 32638):" window
Previous:   [null]
Other Props:    Object has no additional properties
Children:   "" thumb
    (null) title bar
Ancestors:  "Workspace" pane
    "Redacted" window
    "Desktop" pane
    [ No Parent ]

Answer 1

非常好的问题。根据您记录的问题，很明显您的条件:

PropertyCondition workspaceCond = new PropertyCondition(
 AutomationElement.NameProperty, "Workspace", PropertyConditionFlags.IgnoreCase);

... 评估失败。为什么？

答案是如何评估您的条件。查看您的元素树，我们注意到 Workspace 的这个属性:

IsWindowPatternAvailable:   false

对于主窗口和 Untitled3:

IsWindowPatternAvailable:   true

From MSDN :

UIA_IsWindowPatternAvailablePropertyId 30044

Identifies the IsWindowPatternAvailable property, which indicates whether the Window control pattern is available for the automation element. If TRUE, a client can retrieve an IUIAutomationWindowPattern interface from the element.

我们找到一个复制 in this thread ，这意味着与您当前遇到的故障模式相同。我们还注意到此元素缺少 Window 属性，因为 IUIAutomationWindowPattern 不可访问。

可从 aforelinked thread 获得解决方法.代替 PropertyCondition，可以使用:

public class ConditionMatcher : IMatchConditions
{
    public bool Matches(AutomationElement element, Condition condition)
    {
        return new TreeWalker(condition).Normalize(element) != null;
    }
}

或者，或者，可以使用您提供的解决方法，前提是您的树结构保证是浅的(因此，适合该站点的名称，不会触发堆栈溢出)。

不可否认，这不是最明显的问题。在完美的世界中，MSDN 应该有关于这个主题的更好的文档。