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ColumnDefinition.ActualWidth Property

Gets a value that represents the actual calculated width of a ColumnDefinition.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

public double ActualWidth { get; }
You cannot set this property in XAML.

Property Value

Type: System.Double
A Double that represents the actual calculated width in device independent pixels. The default value is 0.0.

This property is a calculated value that is based on other width inputs and the layout system.

When you add or remove rows or columns, the ActualWidth for all ColumnDefinition elements and the ActualHeight of all RowDefinition elements becomes zero until Measure is called.

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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