PropertyChangedCallback Delegate
Definition
Important
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Represents the callback that is invoked when the effective property value of a dependency property changes.
public delegate void PropertyChangedCallback(DependencyObject ^ d, DependencyPropertyChangedEventArgs ^ e);/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.Guid(1520405029, 53570, 17572, 130, 49, 253, 103, 103, 36, 242, 155)]
class PropertyChangedCallback : MulticastDelegate[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.Guid(1520405029, 53570, 17572, 130, 49, 253, 103, 103, 36, 242, 155)]
public delegate void PropertyChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e);Public Delegate Sub PropertyChangedCallback(d As DependencyObject, e As DependencyPropertyChangedEventArgs)Parameters
The DependencyObject on which the property has changed value.
Event data that is issued by any event that tracks changes to the effective value of this property.
- Attributes
Windows requirements
| Device family |
Windows 10 (introduced in 10.0.10240.0)
|
| API contract |
Windows.Foundation.UniversalApiContract (introduced in v1.0)
|
Remarks
You implement callbacks based on this delegate to provide the property-changed behavior for a custom dependency property. You might use this callback to provide value constraints, or to initiate value changes in other properties that depend on the value of the property that is being changed. For more info see Custom dependency properties.