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WindowPattern.WindowClosedEvent Field

Identifies the event that is raised when a window is closed.

Namespace:  System.Windows.Automation
Assembly:  UIAutomationClient (in UIAutomationClient.dll)

public static readonly AutomationEvent WindowClosedEvent

A client application may need to listen for WindowClosedEvent from a cached object since a window is removed from the UI Automation control view structure immediately upon being closed.

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

In the following example, event listeners are declared and an AutomationEventHandler delegate is specified for WindowOpenedEvent and WindowClosedEvent events.

///-------------------------------------------------------------------- 
/// <summary> 
/// Register for events of interest. 
/// </summary> 
/// <param name="targetControl">
/// The automation element of interest. 
/// </param> 
///-------------------------------------------------------------------- 
private void RegisterForAutomationEvents(
    AutomationElement targetControl)
{
    AutomationEventHandler eventHandler = 
        new AutomationEventHandler(OnWindowOpenOrClose);
    Automation.AddAutomationEventHandler(
        WindowPattern.WindowClosedEvent, 
        targetControl, TreeScope.Element, eventHandler);
    Automation.AddAutomationEventHandler(
        WindowPattern.WindowOpenedEvent, 
        targetControl, TreeScope.Element, eventHandler);
}

///-------------------------------------------------------------------- 
/// <summary> 
/// AutomationEventHandler delegate. 
/// </summary> 
/// <param name="src">Object that raised the event.</param>
/// <param name="e">Event arguments.</param>
///-------------------------------------------------------------------- 
private void OnWindowOpenOrClose(object src, AutomationEventArgs e)
{
    // Make sure the element still exists. Elements such as tooltips 
    // can disappear before the event is processed.
    AutomationElement sourceElement;
    try
    {
        sourceElement = src as AutomationElement;
    }
    catch (ElementNotAvailableException)
    {
        return;
    }

    if (e.EventId == WindowPattern.WindowOpenedEvent)
    {
        // TODO: event handling 
        return;
    }
    if (e.EventId == WindowPattern.WindowClosedEvent)
    {
        // TODO: event handling 
        return;
    }
}

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0
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