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GridSplitter.ShowsPreview Property

Gets or sets a value that indicates whether the GridSplitter control updates the column or row size as the user drags the control.

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 bool ShowsPreview { get; set; }
<object ShowsPreview="bool" .../>

Property Value

Type: System.Boolean
true if a GridSplitter preview is displayed; otherwise, false. The default is false.

Identifier field

ShowsPreviewProperty

Metadata properties set to true

None

When the ShowsPreview property is set to true, a preview of the change in the row or column sizes is shown. The actual size changes when the GridSplitter is released. If the property is set to false, the column or row sizes are updated in real time as the user drags the GridSplitter control.

If the keyboard is used to move the GridSplitter control, column or row sizes are updated in real time even if the ShowsPreview property is set to true.

A GridSplitter requires an AdornerDecorator object to be present in its parent tree in order to display drag preview feedback. This requirement is typically met by the AdornerDecorator object that is available in the default style for the Window or in the AdornerDecorator object that is created by a ScrollViewer object. However, if neither of these is available, the GridSplitter control must define its own AdornerDecorator object.

The following example shows how to set the ShowsPreview property.

myGridSplitter.ShowsPreview = true;
<GridSplitter ShowsPreview="True" Width="5"
              Grid.Column="4" Grid.RowSpan="2"/>

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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