QuickOPC User's Guide and Reference
IEasyAEClientExtension Class Methods


OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.AlarmsAndEvents Namespace : IEasyAEClientExtension Class

For a list of all members of this type, see IEasyAEClientExtension members.

Public Methods
 NameDescription
Public Methodstatic (Shared in Visual Basic)Overloaded. Acknowledges a condition in the Event Server. The client will receive event notifications (indicating the acknowledgement) from conditions. This method specifically acknowledges the condition becoming active or transitioning into a different sub-condition (and no other state transition of the condition). One or more conditions belong to a specific event source - the source of the event notification. For each condition-related event notification, the corresponding Source, Condition Name, Active Time and Cookie is received by the client as part of the event notification.

The server can be local or can be remotely accessed via DCOM. Optionally, an access path can be specified or a specific data type can be requested.

The client is required to pass the activeTime and cookie received in the event notification to the AcknowledgeCondition method without modification.

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Public Methodstatic (Shared in Visual Basic)Overloaded. Browses the specified area (or root) in OPC server's process area space, and returns information about child areas found.

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Public Methodstatic (Shared in Visual Basic)Overloaded. Browses the specified area (or root) in OPC server's process area space, and returns information about child nodes (areas or sources) found.  
Public Methodstatic (Shared in Visual Basic)Overloaded. Browses for OPC (Alarms&Events) servers.

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Public Methodstatic (Shared in Visual Basic)Overloaded. Browses the specified area (or root) in OPC server's process area space, and returns information about child sources found.

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Public Methodstatic (Shared in Visual Basic)Overloaded. Changes parameters of a particular event subscription.

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Public Method (Inherited from object)
Public Methodstatic (Shared in Visual Basic)Overloaded. Returns the current state information for the condition instance corresponding to the source and condition name.

The server can be local or can be remotely accessed via DCOM. Optionally, an access path can be specified or a specific data type can be requested.

Some servers may not maintain sufficient condition state information to fully implement this method.

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Public MethodServes as the default hash function. (Inherited from object)
Public MethodGets the System.Type of the current instance. (Inherited from object)
Public Methodstatic (Shared in Visual Basic)Attempts to pull an OPC event subscribed to by the SubscribeEvents method. Returns refresh or standard event notifications.  
Public Methodstatic (Shared in Visual Basic)Overloaded. Finds out event attributes that the server can provide as part of an event notification within a given event category. Uses server descriptor for specifying the OPC server.  
Public Methodstatic (Shared in Visual Basic)Overloaded. Finds out event conditions supported by given event category. Uses server descriptor for specifying the OPC server.  
Public Methodstatic (Shared in Visual Basic)Overloaded. The QueryEventCategories method gives clients a means of finding out the specific categories of events supported by a given server. This method would typically be invoked prior to specifying an event filter. Servers are able to define their own custom event categories, but a list of recommended categories is provided in the OPC specification.

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Public Methodstatic (Shared in Visual Basic)Finds out event conditions associated with the specified source name. Computer name and server class are used for specifying the OPC server.  
Public Methodstatic (Shared in Visual Basic)Overloaded. Subscribe to particular OPC events. The Notification is generated for each event.

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Public MethodReturns a string that represents the current object. (Inherited from object)
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Protected Methods
 NameDescription
Protected MethodAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from object)
Protected MethodCreates a shallow copy of the current System.Object. (Inherited from object)
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See Also

Reference

IEasyAEClientExtension Class
OpcLabs.EasyOpc.AlarmsAndEvents Namespace