Article
11/18/2011

RoutedPropertyChangedEventArgs<T> Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Provides data about a change in value to a dependency property as reported by particular routed events, including the previous and current value of the property that changed.

Inheritance Hierarchy

System.Object
  System.EventArgs
    System.Windows.RoutedEventArgs
      System.Windows.RoutedPropertyChangedEventArgs<T>

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

Syntax

'Declaration
Public Class RoutedPropertyChangedEventArgs(Of T) _
    Inherits RoutedEventArgs

public class RoutedPropertyChangedEventArgs<T> : RoutedEventArgs

Type Parameters

T
The type of the dependency property that has changed.

The RoutedPropertyChangedEventArgs<T> type exposes the following members.

Constructors

	Name	Description
	RoutedPropertyChangedEventArgs<T>	Initializes a new instance of the RoutedPropertyChangedEventArgs<T> class, with provided old and new values.

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Properties

	Name	Description
	NewValue	Gets the new value of a property as reported by a property-changed event.
	OldValue	Gets the previous value of the property as reported by a property-changed event.
	OriginalSource	Gets a reference to the object that raised the event. (Inherited from RoutedEventArgs.)

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Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

This is a generic class where the class is used for event data of different events. Different routed events can specify the type constraint of the generic to produce a type-specific event data class. Once the class is constrained, the OldValue and NewValue properties also reflect these type constraints. Therefore, you can use a common event data class for different property-changed events without requiring different delegates for each possible property type.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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