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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; }

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.

.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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