AutomationElement.FindFirst(TreeScope, Condition) メソッド

定義

指定した条件と一致する最初の子要素または子孫要素を返します。Returns the first child or descendant element that matches the specified condition.

public:
 System::Windows::Automation::AutomationElement ^ FindFirst(System::Windows::Automation::TreeScope scope, System::Windows::Automation::Condition ^ condition);
public System.Windows.Automation.AutomationElement FindFirst (System.Windows.Automation.TreeScope scope, System.Windows.Automation.Condition condition);
member this.FindFirst : System.Windows.Automation.TreeScope * System.Windows.Automation.Condition -> System.Windows.Automation.AutomationElement

パラメーター

scope
TreeScope

検索のスコープを指定する、値のビットごとの組み合わせ。A bitwise combination of values that specifies the scope of the search.

condition
Condition

照合する検索条件を格納するオブジェクト。The object containing the criteria to match.

戻り値

条件を満たす最初の要素。一致が見つからなかった場合は nullThe first element that satisfies the condition, or null if no match is found.

次の例では、識別子から子ウィンドウを検索する方法を示します。The following example shows how to find a child window from its identifier.

/// <summary>
/// Find a UI Automation child element by ID.
/// </summary>
/// <param name="controlName">Name of the control, such as "button1"</param>
/// <param name="parentElement">Parent element, such as an application window, or the 
/// AutomationElement.RootElement when searching for the application window.</param>
/// <returns>The UI Automation element.</returns>
private AutomationElement FindChildElement(String controlName, AutomationElement rootElement)
{
    if ((controlName == "") || (rootElement == null))
    {
        throw new ArgumentException("Argument cannot be null or empty.");
    }
    // Set a property condition that will be used to find the main form of the
    // target application. In the case of a WinForms control, the name of the control
    // is also the AutomationId of the element representing the control.
    Condition propCondition = new PropertyCondition(
        AutomationElement.AutomationIdProperty, controlName, PropertyConditionFlags.IgnoreCase);

    // Find the element.
    return rootElement.FindFirst(TreeScope.Element | TreeScope.Children, propCondition);
}
''' <summary>
''' Find a UI Automation child element by ID.
''' </summary>
''' <param name="controlName">Name of the control, such as "button1"</param>
''' <param name="rootElement">Parent element, such as an application window, or the 
''' AutomationElement.RootElement when searching for the application window.</param>
''' <returns>The UI Automation element.</returns>
Private Function FindChildElement(ByVal controlName As String, ByVal rootElement As AutomationElement) _
    As AutomationElement
    If controlName = "" OrElse rootElement Is Nothing Then
        Throw New ArgumentException("Argument cannot be null or empty.")
    End If
    ' Set a property condition that will be used to find the main form of the
    ' target application. In the case of a WinForms control, the name of the control
    ' is also the AutomationId of the element representing the control.
    Dim propCondition As New PropertyCondition(AutomationElement.AutomationIdProperty, _
        controlName, PropertyConditionFlags.IgnoreCase)

    ' Find the element.
    Return rootElement.FindFirst(TreeScope.Element Or TreeScope.Children, propCondition)

End Function 'FindChildElement

注釈

検索のスコープは、メソッドが呼び出される要素に対して相対的です。The scope of the search is relative to the element on which the method is called.

デスクトップでトップレベルウィンドウを検索する場合は、でChildren scopeはなくDescendants、を指定してください。When searching for a top-level window on the desktop, be sure to specify Children in scope, not Descendants. デスクトップのサブツリー全体を検索すると、何千もの項目を反復処理し、stack overflow に陥る可能性があります。A search through the entire subtree of the desktop could iterate through thousands of items and lead to a stack overflow.

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見つけようとする場合は、すべてUI オートメーションUI Automationの呼び出しを個別のスレッドで行う必要があります。If your client application might try to find elements in its own user interface, you must make all UI オートメーションUI Automation calls on a separate thread.

適用対象

こちらもご覧ください