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TextPointer.HasValidLayout Property

Gets a value that indicates whether the text container associated with the current position has a valid (up-to-date) layout.

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

public bool HasValidLayout { get; }

Property Value

Type: System.Boolean
true if the layout is current and valid; otherwise, false.

When necessary, operations that depend on a valid layout (such as the GetLineStartPosition method, GetCharacterRect method, and IsAtLineStartPosition property) attempt to automatically regenerate a valid layout before proceeding with the operation. Regenerating a layout can be a relatively expensive operation. Use this property to check for a valid layout before performing operations that may regenerate the layout. For more information, see Layout System.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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