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SourceChangedEventArgs Class

Provides data for the SourceChanged event, used for interoperation. This class cannot be inherited.

System.Object
  System.EventArgs
    System.Windows.RoutedEventArgs
      System.Windows.SourceChangedEventArgs

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

public sealed class SourceChangedEventArgs : RoutedEventArgs

The SourceChangedEventArgs type exposes the following members.

  NameDescription
Public methodSourceChangedEventArgs(PresentationSource, PresentationSource)Initializes a new instance of the SourceChangedEventArgs class, using supplied information for the old and new sources.
Public methodSourceChangedEventArgs(PresentationSource, PresentationSource, IInputElement, IInputElement)Initializes a new instance of the SourceChangedEventArgs class, using supplied information for the old and new sources, the element that this change effects, and the previous reported parent of that element.
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  NameDescription
Public propertyElementGets the element whose parent change causing the presentation source information to change.
Public propertyHandledGets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. (Inherited from RoutedEventArgs.)
Public propertyNewSourceGets the new source involved in this source change.
Public propertyOldParentGets the previous parent of the element whose parent change causing the presentation source information to change.
Public propertyOldSourceGets the old source involved in this source change.
Public propertyOriginalSourceGets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. (Inherited from RoutedEventArgs.)
Public propertyRoutedEventGets or sets the RoutedEvent associated with this RoutedEventArgs instance. (Inherited from RoutedEventArgs.)
Public propertySourceGets or sets a reference to the object that raised the event. (Inherited from RoutedEventArgs.)
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  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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The SourceChanged event is a routed event where the event identifier is not publicly exposed. This is because this event plays a potentially critical part in interoperation and should not be allowed to be raised arbitrarily by any other source than the internal implementation of a known PresentationSource subclass (currently, the only such class is HwndSource). When implementing an interoperation solution, you can attach or remove handlers for the event (by calling AddSourceChangedHandler and RemoveSourceChangedHandler, respectively) but you cannot perform other operations normally available to routed events such as class handling, adding owners, or raising the event from an arbitrary element source.

This class overrides the RoutedEventArgs virtual method RoutedEventArgs.InvokeEventHandler, in order to return a type-specific handler when requested by the event system. This SourceChangedEventArgs override does not appear in the class members table in this SDK documentation because it is a protected member implemented by a sealed class.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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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