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PropertyMetadata.DefaultValue Property

Gets and sets the default value of the dependency property.

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

public Object DefaultValue { get; set; }
/** @property */
public Object get_DefaultValue ()

/** @property */
public void set_DefaultValue (Object value)

public function get DefaultValue () : Object

public function set DefaultValue (value : Object)

 Members of this type are not typically used in XAML. 

Property Value

The default value of the property. The default value on a PropertyMetadata instance created with the parameterless constructor will be UnsetValue; see Remarks.

Exception typeCondition

ArgumentException

Cannot be set to the value UnsetValue once created; see Remarks.

InvalidOperationException

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

DefaultValue is defined in the object model as read-write. This is so DefaultValue 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 DefaultValue once IsSealed is true on this metadata instance will raise an exception.

Although it is the default per the parameterless constructor, a defaultValue of UnsetValue cannot be set using either DefaultValue or the constructor. Attempting to do so 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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