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Expander.IsExpanded Property

Gets or sets whether the Expander content window 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

[BindableAttribute(true)]
public bool IsExpanded { get; set; }
<object IsExpanded="bool" .../>

Property Value

Type: System.Boolean
true if the content window is expanded; otherwise, false. The default is false.

The following example shows how to set the IsExpanded property.

myExpanderIsExpanded.IsExpanded = true;
<Expander Name ="myExpanderIsExpanded" IsExpanded="True"  
          Header ="expanderTitle" Content="expanderContent"/>

.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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