RoutedPropertyChangedEventArgs<T> Class
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
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.
System::EventArgs
System.Windows::RoutedEventArgs
System.Windows::RoutedPropertyChangedEventArgs<T>
Assembly: System.Windows (in System.Windows.dll)
The RoutedPropertyChangedEventArgs<T> type exposes the following members.
| Name | Description | |
|---|---|---|
 | RoutedPropertyChangedEventArgs<T> | Initializes a new instance of the RoutedPropertyChangedEventArgs<T> class, with provided old and new values. |
| 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.) |
| 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.) |
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.