TreeWalker.ContentViewWalker フィールド

定義

名前空間:

System.Windows.Automation

アセンブリ:

UIAutomationClient.dll

コンテンツ コントロールとしてマークされているツリー内の要素のビューを格納している定義済みの TreeWalker を表します。

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

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

 staticval mutable ContentViewWalker : System.Windows.Automation.TreeWalker

Public Shared ReadOnly ContentViewWalker As TreeWalker 

フィールド値

TreeWalker

例

次の例は、サブツリー内の要素のツリー ビューを構築するために使用されていることを示しています ControlViewWalker 。 の ContentViewWalker 使用法は同じです。

/// <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

注釈

クライアント アプリケーションが独自のユーザー インターフェイスで要素を検索しようとする場合は、別のスレッドですべての UI オートメーション呼び出しを行う必要があります。

こちらもご覧ください

• IsContentElementProperty
• IsControlElementProperty
• UI オートメーション ツリーの概要
• TreeWalker を使用した UI オートメーション要素間の移動
• UI オートメーション要素の取得