ExpandCollapsePattern.ExpandCollapseStateProperty 字段
定义
重要
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标识 ExpandCollapseState 属性。
public: static initonly System::Windows::Automation::AutomationProperty ^ ExpandCollapseStateProperty;public static readonly System.Windows.Automation.AutomationProperty ExpandCollapseStateProperty; staticval mutable ExpandCollapseStateProperty : System.Windows.Automation.AutomationPropertyPublic Shared ReadOnly ExpandCollapseStateProperty As AutomationProperty 字段值
示例
在下面的示例中，将根元素传递给一个函数，该函数返回一组UI 自动化元素，这些元素是根的后代，并满足一组属性条件。
///--------------------------------------------------------------------
/// <summary>
/// Finds all automation elements that satisfy
/// the specified condition(s).
/// </summary>
/// <param name="targetApp">
/// The automation element from which to start searching.
/// </param>
/// <returns>
/// A collection of automation elements satisfying
/// the specified condition(s).
/// </returns>
///--------------------------------------------------------------------
private AutomationElementCollection FindAutomationElement(
AutomationElement targetApp)
{
if (targetApp == null)
{
throw new ArgumentException("Root element cannot be null.");
}
PropertyCondition conditionLeafNode =
new PropertyCondition(
ExpandCollapsePattern.ExpandCollapseStateProperty,
ExpandCollapseState.LeafNode);
return targetApp.FindAll(
TreeScope.Descendants, conditionLeafNode);
}
'''--------------------------------------------------------------------
''' <summary>
''' Finds all automation elements that satisfy
''' the specified condition(s).
''' </summary>
''' <param name="targetApp">
''' The automation element from which to start searching.
''' </param>
''' <returns>
''' A collection of automation elements satisfying
''' the specified condition(s).
''' </returns>
'''--------------------------------------------------------------------
Private Function FindAutomationElement( _
ByVal targetApp As AutomationElement) As AutomationElementCollection
If targetApp Is Nothing Then
Throw New ArgumentException("Root element cannot be null.")
End If
Dim conditionLeafNode As New PropertyCondition( _
ExpandCollapsePattern.ExpandCollapseStateProperty, _
ExpandCollapseState.LeafNode)
Return targetApp.FindAll(TreeScope.Descendants, conditionLeafNode)
End Function 'FindAutomationElement
注解
此标识符由UI 自动化客户端应用程序使用。 UI 自动化提供程序应使用等效字段。ExpandCollapsePatternIdentifiers
ExpandCollapseState 仅表示直接子对象的可见性，而不表示所有后代对象的可见性。
默认值是 Expanded。