PropertyChangedExtendedEventArgs Class

Represents a PropertyChangedEventArgs with property value. The actual type of the event argument of the ObservableObjectBase.PropertyChanged event is PropertyChangedExtendedEventArgs.

Definition

Namespace: KGySoft.ComponentModel
Assembly: KGySoft.CoreLibraries (in KGySoft.CoreLibraries.dll) Version: 9.0.0-preview.1

C#

public class PropertyChangedExtendedEventArgs : PropertyChangedEventArgs

VB

Public Class PropertyChangedExtendedEventArgs
	Inherits PropertyChangedEventArgs

C++

public ref class PropertyChangedExtendedEventArgs : public PropertyChangedEventArgs

F#

type PropertyChangedExtendedEventArgs = 
    class
        inherit PropertyChangedEventArgs
    end

Inheritance: Object EventArgs PropertyChangedEventArgs PropertyChangedExtendedEventArgs

Remarks

Note

The ObservableObjectBase.PropertyChanged event uses the PropertyChangedEventHandler delegate in order to consumers, which rely on the conventional property changed notifications can use it in a compatible way. To get the old value in an event handler you can cast the argument to PropertyChangedExtendedEventArgs or call the TryGetOldPropertyValue extension method on it.

Constructors

PropertyChangedExtendedEventArgs

Initializes a new instance of the PropertyChangedExtendedEventArgs class.

Properties

NewValue	Gets the property value after the change or MissingProperty if the property has just been reset and there is no stored value for it.
OldValue	Gets the property value before the change or MissingProperty if no previous value was stored for the property before the change.

Extension Methods

Convert	Converts an Object specified in the obj parameter to the desired targetType. See the Examples section of the generic ConvertTTarget(Object, CultureInfo) overload for an example. (Defined by ObjectExtensions)
ConvertTTarget	Converts an Object specified in the obj parameter to the desired TTarget. (Defined by ObjectExtensions)
In	Gets whether item is among the elements of set. See the Examples section of the generic InT(T, T) overload for an example. (Defined by ObjectExtensions)
TryConvert	Tries to convert an Object specified in the obj parameter to the desired targetType. See the Examples section of the ConvertTTarget(Object, CultureInfo) method for a related example. (Defined by ObjectExtensions)
TryConvert	Tries to convert an Object specified in the obj parameter to the desired targetType. See the Examples section of the ConvertTTarget(Object, CultureInfo) method for a related example. (Defined by ObjectExtensions)
TryConvertTTarget	Tries to convert an Object specified in the obj parameter to the desired TTarget. See the Examples section of the ConvertTTarget(Object, CultureInfo) method for a related example. (Defined by ObjectExtensions)
TryConvertTTarget	Tries to convert an Object specified in the obj parameter to the desired TTarget. See the Examples section of the ConvertTTarget(Object, CultureInfo) method for a related example. (Defined by ObjectExtensions)
TryGetNewPropertyValue	If the specified event args is a PropertyChangedExtendedEventArgs instance, then gets the property value after the change. (Defined by PropertyChangedEventArgsExtensions)
TryGetOldPropertyValue	If the specified event args is a PropertyChangedExtendedEventArgs instance, then gets the property value before the change. (Defined by PropertyChangedEventArgsExtensions)