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PropertyMetadata.CoerceValueCallback Property

Gets or sets a reference to a CoerceValueCallback implementation specified in this metadata.

Namespace: System.Windows
Assembly: WindowsBase (in windowsbase.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public CoerceValueCallback CoerceValueCallback { get; set; }
/** @property */
public CoerceValueCallback get_CoerceValueCallback ()

/** @property */
public void set_CoerceValueCallback (CoerceValueCallback value)

public function get CoerceValueCallback () : CoerceValueCallback

public function set CoerceValueCallback (value : CoerceValueCallback)

You cannot use this property in XAML.

Property Value

A CoerceValueCallback implementation reference.

Exception typeCondition

InvalidOperationException

Cannot set a metadata property once it is applied to a dependency property operation.

The callbacks in property metadata are not typically public members on the containing type, so the value of this property is not important for most scenarios that just consume an existing dependency property's metadata. One reason this property is exposed is so that metadata subclasses can perform their desired merge logic if both base metadata and overriding/adding metadata specify a CoerceValueCallback. However, the default merge logic for a CoerceValueCallback is to replace the previous one.

CoerceValueCallback is defined in the object model as read-write. This is so CoerceValueCallback can be adjusted after initialization of the PropertyMetadata object itself. However, once the metadata is consumed as part of a call to Register, AddOwner, or OverrideMetadata, the property system will seal that metadata instance and the properties are now considered immutable. Attempting to set CoerceValueCallback once IsSealed is true on this metadata instance will raise an exception.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0
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