Initializes a new instance of the PropertyMetadata class with the specified default value and callbacks.
(in WindowsBase.dll)
Visual Basic (Declaration)
Public Sub New ( _
defaultValue As Object, _
propertyChangedCallback As PropertyChangedCallback, _
coerceValueCallback As CoerceValueCallback _
)
Dim defaultValue As Object
Dim propertyChangedCallback As PropertyChangedCallback
Dim coerceValueCallback As CoerceValueCallback
Dim instance As New PropertyMetadata(defaultValue, _
propertyChangedCallback, coerceValueCallback)
public PropertyMetadata(
Object defaultValue,
PropertyChangedCallback propertyChangedCallback,
CoerceValueCallback coerceValueCallback
)
public:
PropertyMetadata(
Object^ defaultValue,
PropertyChangedCallback^ propertyChangedCallback,
CoerceValueCallback^ coerceValueCallback
)
public function PropertyMetadata(
defaultValue : Object,
propertyChangedCallback : PropertyChangedCallback,
coerceValueCallback : CoerceValueCallback
)
You cannot use constructors in XAML.
If you want to specify a CoerceValueCallback but not a PropertyChangedCallback, you can pass nullNothingnullptra null reference (Nothing in Visual Basic) for the propertyChangedCallback parameter.
The type of the value provided for defaultValue must be match or be related to the type specified in the original registration of the dependency property that this metadata will be applied to. Mismatches between metadata default value type and the type of the dependency property it is being applied to can be difficult to debug, because the mismatch is not detectable during compilation (the mismatch will raise a run-time exception).
Although it is the default per the parameterless constructor, a defaultValue of UnsetValue cannot be specified. Attempting to do so will raise an exception.
static PropertyMetadata pm;
...
pm = new PropertyMetadata(
Double.NaN,
new PropertyChangedCallback(OnCurrentReadingChanged),
new CoerceValueCallback(CoerceCurrentReading)
);
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
Reference
Other Resources