TreeWalker.RawViewWalker Поле

Определение

Пространство имен:

System.Windows.Automation

Сборка:

UIAutomationClient.dll

Представляет заранее определенный объект TreeWalker, который содержит представление всех элементов дерева.

public: static initonly System::Windows::Automation::TreeWalker ^ RawViewWalker;

public static readonly System.Windows.Automation.TreeWalker RawViewWalker;

 staticval mutable RawViewWalker : System.Windows.Automation.TreeWalker

Public Shared ReadOnly RawViewWalker As TreeWalker 

Значение поля

TreeWalker

Примеры

В следующем примере показано ControlViewWalker , как создать древовидное представление элементов в поддереве. Использование для RawViewWalker идентично.

/// <summary>
/// Walks the UI Automation tree and adds the control type of each element it finds 
/// in the control view to a TreeView.
/// </summary>
/// <param name="rootElement">The root of the search on this iteration.</param>
/// <param name="treeNode">The node in the TreeView for this iteration.</param>
/// <remarks>
/// This is a recursive function that maps out the structure of the subtree beginning at the
/// UI Automation element passed in as rootElement on the first call. This could be, for example,
/// an application window.
/// CAUTION: Do not pass in AutomationElement.RootElement. Attempting to map out the entire subtree of
/// the desktop could take a very long time and even lead to a stack overflow.
/// </remarks>
private void WalkControlElements(AutomationElement rootElement, TreeNode treeNode)
{
    // Conditions for the basic views of the subtree (content, control, and raw) 
    // are available as fields of TreeWalker, and one of these is used in the 
    // following code.
    AutomationElement elementNode = TreeWalker.ControlViewWalker.GetFirstChild(rootElement);

    while (elementNode != null)
    {
        TreeNode childTreeNode = treeNode.Nodes.Add(elementNode.Current.ControlType.LocalizedControlType);
        WalkControlElements(elementNode, childTreeNode);
        elementNode = TreeWalker.ControlViewWalker.GetNextSibling(elementNode);
    }
}

''' <summary>
''' Walks the UI Automation tree and adds the control type of each element it finds 
''' in the control view to a TreeView.
''' </summary>
''' <param name="rootElement">The root of the search on this iteration.</param>
''' <param name="treeNode">The node in the TreeView for this iteration.</param>
''' <remarks>
''' This is a recursive function that maps out the structure of the subtree beginning at the
''' UI Automation element passed in as rootElement on the first call. This could be, for example,
''' an application window.
''' CAUTION: Do not pass in AutomationElement.RootElement. Attempting to map out the entire subtree of
''' the desktop could take a very long time and even lead to a stack overflow.
''' </remarks>
Private Sub WalkControlElements(ByVal rootElement As AutomationElement, ByVal treeNode As TreeNode)
    ' Conditions for the basic views of the subtree (content, control, and raw) 
    ' are available as fields of TreeWalker, and one of these is used in the 
    ' following code.
    Dim elementNode As AutomationElement = TreeWalker.ControlViewWalker.GetFirstChild(rootElement)

    While (elementNode IsNot Nothing)
        Dim childTreeNode As TreeNode = treeNode.Nodes.Add(elementNode.Current.ControlType.LocalizedControlType)
        WalkControlElements(elementNode, childTreeNode)
        elementNode = TreeWalker.ControlViewWalker.GetNextSibling(elementNode)
    End While

End Sub

Комментарии

Если клиентское приложение может попытаться найти элементы в собственном пользовательском интерфейсе, необходимо выполнять все вызовы автоматизации пользовательского интерфейса в отдельном потоке.

См. также раздел

• Общие сведения о дереве модели автоматизации пользовательского интерфейса
• Навигация между элементами автоматизированного пользовательского интерфейса с помощью TreeWalker
• Получение элементов автоматизации пользовательского интерфейса