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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
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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