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TextBoxBase.IsUndoEnabled Property

Gets or sets a value that indicates whether undo support is enabled for the text-editing control.

Namespace:  System.Windows.Controls.Primitives
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 bool IsUndoEnabled { get; set; }
<object IsUndoEnabled="bool" .../>

Property Value

Type: System.Boolean
true if undo support is enabled; otherwise, false. The default value is true.

Identifier field

IsUndoEnabledProperty

Metadata properties set to true

None

Setting this property to false clears the undo stack. Therefore, if you disable undo and then re-enable it, undo commands still do not work because the undo stack was emptied when you disabled undo.

The following example demonstrates how to use the IsUndoEnabled property in Extensible Application Markup Language (XAML).

<TextBox TextWrapping="Wrap"
         Name="myTextBox" 
         Width="500" 
         Height="200" 
         AcceptsReturn="True"
         IsUndoEnabled="True"
         VerticalScrollBarVisibility="Visible"
         HorizontalScrollBarVisibility="Auto" 
         Margin="25">

.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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