IExpandCollapseProvider IExpandCollapseProvider IExpandCollapseProvider IExpandCollapseProvider Interface


Exposes methods and properties to support access by a Microsoft UI Automation client to controls that visually expand to display content and that collapse to hide content. Implement this interface in order to support the capabilities that an automation client requests with a GetPattern call and PatternInterface.ExpandCollapse.

public : interface IExpandCollapseProvider
struct winrt::Windows::UI::Xaml::Automation::Provider::IExpandCollapseProvider
public interface IExpandCollapseProvider
Public Interface IExpandCollapseProvider
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v1)


This pattern has guidelines and conventions that aren't fully documented here. For more info on what this pattern is for, see ExpandCollapse Control Pattern.

IExpandCollapseProvider is implemented by the existing Windows Runtime automation peer for ComboBox (ComboBoxAutomationPeer ).

Use ExpandCollapsePatternIdentifiers if you want to reference the IExpandCollapseProvider pattern properties from control code when you fire automation events or call RaisePropertyChangedEvent.


ExpandCollapseState ExpandCollapseState ExpandCollapseState ExpandCollapseState

Gets the state (expanded or collapsed) of the control.

public : ExpandCollapseState ExpandCollapseState { get; }
ExpandCollapseState ExpandCollapseState();
public ExpandCollapseState ExpandCollapseState { get; }
Public ReadOnly Property ExpandCollapseState As ExpandCollapseState
ExpandCollapseState ExpandCollapseState

The state (expanded or collapsed) of the control.


Collapse() Collapse() Collapse() Collapse()

Hides all nodes, controls, or content that are descendants of the control.

public : void Collapse()
void Collapse() const;
public void Collapse()
Public Function Collapse() As void

Expand() Expand() Expand() Expand()

Displays all child nodes, controls, or content of the control.

public : void Expand()
void Expand() const;
public void Expand()
Public Function Expand() As void

See Also