Expander.Collapsed Event

Occurs when the content window of an Expander control closes and only the Header is visible.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public event RoutedEventHandler Collapsed
<object Collapsed="RoutedEventHandler" .../>

Identifier field

CollapsedEvent

Routing strategy

Bubbling

Delegate

RoutedEventHandler

The Collapsed event occurs when the IsExpanded property changes from true to false.

The following example shows how to specify the event handler for the Collapsed event.

myExpander.Collapsed += new RoutedEventHandler(expanderHasCollapsed);            
<Expander Name ="myExpander" Collapsed="expanderHasCollapsed" 
          Header ="expanderTitle" Content="expanderContent"/>

The following example shows how to define the event handler.

private void expanderHasCollapsed(object sender, RoutedEventArgs args)
{
    //Do something when the Expander control collapses
}

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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