Apama.Util.PropertyChangedEventArgs Class Reference

A "PropertyChanged" event gets delivered whenever an object changes a "bound" or "constrained" property. A PropertyChangeEvent object is sent as an argument to the PropertyChangeListener method. More...

Inherits PropertyChangedEventArgs.

Public Member Functions
	PropertyChangedEventArgs (string propertyName, object oldValue, object newValue)
	Constructs a new More...

Properties
virtual object	NewValue [get]
	Sets the new value for the property, expressed as an object. More...
virtual object	OldValue [get]
	Gets the old value for the property, expressed as an object. More...

Detailed Description

A "PropertyChanged" event gets delivered whenever an object changes a "bound" or "constrained" property. A PropertyChangeEvent object is sent as an argument to the PropertyChangeListener method.

Normally PropertyChangedEvents are accompanied by the name and the old and new value of the changed property.

Null values may be provided for the old and the new values if their true values are not known.

Constructor & Destructor Documentation

Apama.Util.PropertyChangedEventArgs.PropertyChangedEventArgs	(	string	propertyName,
		object	oldValue,
		object	newValue
	)

Constructs a new

PropertyChangedEvent.

Parameters

propertyName	The name of the property that changed.
oldValue	The old value of the property.
newValue	The new value of the property.

Property Documentation

virtual object Apama.Util.PropertyChangedEventArgs.NewValue

get

Sets the new value for the property, expressed as an object.

Returns

The new value for the property, expressed as an object. May be null if multiple properties have changed.

virtual object Apama.Util.PropertyChangedEventArgs.OldValue

get

Gets the old value for the property, expressed as an object.

Returns

The old value for the property, expressed as an object. May be null if multiple properties have changed.