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AF SDK Reference

AFSecurityIdentity.Changed Event

  • Last UpdatedNov 18, 2025
  • 2 minute read
AFSecurityIdentity.Changed Event
Event is raised when the object or one of its sub-objects is changed.

Namespace:  OSIsoft.AF
Assembly:  OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version: 3.1.1.1182

Syntax

public event EventHandler<AFChangedEventArgs> Changed
Public Event Changed As EventHandler(Of AFChangedEventArgs)

Dim instance As AFSecurityIdentity
Dim handler As EventHandler(Of AFChangedEventArgs)

AddHandler instance.Changed, handler
public:
virtual  event EventHandler<AFChangedEventArgs^>^ Changed {
	void add (EventHandler<AFChangedEventArgs^>^ value);
	void remove (EventHandler<AFChangedEventArgs^>^ value);
}
abstract Changed : IEvent<EventHandler<AFChangedEventArgs>,
    AFChangedEventArgs>
override Changed : IEvent<EventHandler<AFChangedEventArgs>,
    AFChangedEventArgs>

Value

Type: SystemEventHandlerAFChangedEventArgs

Implements

IAFChangedEventChanged

Remarks

A Changed event is raised when an object is changed or one of its sub-objects is changed. This is normally caused by a modification to the object. It could also be raised as result of checking in changes (IAFTransactable.CheckIn), checking out to make changes (IAFTransactable.CheckOut), or undoing a check out (IAFTransactable.UndoCheckOut). A PISystem.Refresh or AFDatabase.Refresh can also raise a Changed events for each change detected that was made by another application.

For more information about the information provided by the Changed event, see AFChangedEventArgs and AFChangeAction.

Examples

For an example of how to handle events, see Event Example.

Version Information

AFSDK

Supported in: 3.1.1, 3.1.0, 3.0.2, 3.0.1, 3.0.0, 2.10.11, 2.10.5, 2.10.0, 2.10, 2.9.5, 2.9, 2.8.5, 2.8, 2.7.5, 2.7

See Also

Reference

SystemEventHandlerTEventArgs
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