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ExpandCollapsePattern.ExpandCollapseStateProperty Field

  • Reference

Definition

Namespace:
System.Windows.Automation
Assembly:
UIAutomationClient.dll

Identifies the ExpandCollapseState property.

public: static initonly System::Windows::Automation::AutomationProperty ^ ExpandCollapseStateProperty;
public static readonly System.Windows.Automation.AutomationProperty ExpandCollapseStateProperty;
 staticval mutable ExpandCollapseStateProperty : System.Windows.Automation.AutomationProperty
Public Shared ReadOnly ExpandCollapseStateProperty As AutomationProperty

Field Value

AutomationProperty

Examples

In the following example, a root element is passed to a function that returns a collection of UI Automation elements that are descendants of the root and satisfy a set of property conditions.

///--------------------------------------------------------------------
/// <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

Remarks

This identifier is used by UI Automation client applications. UI Automation providers should use the equivalent field in ExpandCollapsePatternIdentifiers.

ExpandCollapseState refers to the visibility of immediate child objects only; it does not refer to the visibility of all descendant objects.

The default value is Expanded.

Applies to

See also