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Implementing the UI Automation SelectionItem Control Pattern

This topic introduces guidelines and conventions for implementing ISelectionItemProvider, including information about properties, methods, and events. Links to additional references are listed at the end of the overview.

The SelectionItemPattern control pattern is used to support controls that act as individual, selectable child items of container controls that implement ISelectionProvider. For examples of controls that implement the SelectionItem control pattern, see Control Pattern Mapping for UI Automation Clients

This topic contains the following sections.

Implementation Guidelines and Conventions

When implementing the Selection Item control pattern, note the following guidelines and conventions:

  • Single-selection controls that manage child controls that implement IRawElementProviderFragmentRoot, such as the Screen Resolution slider in the Display Properties dialog box, should implement ISelectionProvider and their children should implement both IRawElementProviderFragment and ISelectionItemProvider.

Required Members for ISelectionItemProvider

The following properties, methods, and events are required for implementing ISelectionItemProvider.

Required members Member type Notes

CanSelectMultiple

Property

None

IsSelectionRequired

Property

None

GetSelection

Method

None

InvalidatedEvent

Event

Raised when a selection in a container has changed significantly and requires sending more ElementSelectedEvent and ElementRemovedFromSelectionEvent events than the InvalidateLimit constant permits.

Exceptions

Providers must throw the following exceptions.

Exception type Condition

InvalidOperationException

When any of the following are attempted:

See Also

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