Reference

OpcNode Class

Namespace

Opc.UaFx

Assembly

Opc.UaFx.Advanced.dll

Package

Opc.UaFx.Advanced v2.59.0

Members

OpcNode Members

Represents the base class of the node classes which define the nodes of an address space, such as OpcObjectNode, OpcVariableNode and OpcMethodNode.

Syntax

public class OpcNode

Public Class OpcNode

Inheritance

Object → OpcNode

Implements

• IOpcNode
• IOpcNodeInfo

Derived types

• OpcInstanceNode
• OpcTypeNode

Properties

Name	Description
Category	Gets the NodeCategory attribute which identifies the kind of node and is therefore used to classify the node regarding its use and purpose.
Description	Gets or sets the value of the optional Description attribute which shall explain the meaning of the node.
Descriptionssince v2.12	Gets the OpcNodeGlobalization instance used to control the localization and other globalization related tasks for the Description attribute of the current node.
DisplayName	Gets or sets the value of the DisplayName attribute which defines the localizable name of the node.
DisplayNamessince v2.12	Gets the OpcNodeGlobalization instance used to control the localization and other globalization related tasks for the DisplayName attribute of the current node.
HasPendingChanges	Gets a value indiciating whether there exists any pending change on the node.
Id	Gets the value of the NodeId attribute which unambiguously identifies the node.
Modelsince v2.50	Gets the OpcNodeModel which has been used to model this OpcNode regarding its whole representation in the address space.
Name	Gets or sets the value of the BrowseName attribute which defines the non-localizable human-readable name used when browsing the address space.
Namespace	Gets the namespace of the node.
Parentvirtual	Gets the parent node of the node.
PendingChanges	Gets a value indicating the most recent changes performed on the node since their last notification.
QueryEventsCallback	Gets or sets a callback used to query any event information which belongs to the node.
ReadDescriptionCallback	Gets or sets a callback used to read the value of the Description attribute.
ReadDisplayNameCallbacksince v2.11	Gets or sets a callback used to read the value of the DisplayName attribute.
ReadUserWriteAccessCallback	Gets or sets a callback used to read the value of the UserWriteAccess attribute.
ReadWriteAccessCallback	Gets or sets a callback used to read the value of the WriteAccess attribute.
SymbolicName	Gets or sets a symbolic name for the node which is not expected to be globally unique.
Tag	Gets or sets the object that contains additional user data about the node.
UserWriteAccess	Gets or sets the value of the optional UserWriteAccess attribute which exposes the possibilities of a client to write the attributes of the node taking user access rights into account.
WriteAccess	Gets or sets the value of the optional WriteAccess attribute which exposes the posibilities of a client to write the attributes of the node.
WriteDescriptionCallback	Gets or sets a callback used to write the value of the Description attribute.
WriteDisplayNameCallbacksince v2.11	Gets or sets a callback used to write the value of the DisplayName attribute.
WriteUserWriteAccessCallback	Gets or sets a callback used to write the value of the UserWriteAccess attribute.
WriteWriteAccessCallback	Gets or sets a callback used to write the value of the WriteAccess attribute.

Methods

Name	Description
AddNotifiervirtual	When implemented in a subtype, adds the node to the collection of notifiers (= event sources) of this node.
ApplyChangesvirtual · 2 overloads	Notifies about changes performed on the node since the last notification and resets the pending changes to None.
AttributeValue2 overloads · since v2.9	Retrieves the value of the attribute specified.
Childsince v2.7	Retrieves the child node its Name property matches exactly the name specified.
ChildModelprotected · since v2.50	Retrieves the model of the child node with the name specified from the Model of the node.
ChildModellingDirectiveprotected · since v2.50	Retrieves the modelling directive of the child node with the name specified from the Model of the node.
Children	Retrieves a sequence of all nodes organized as children of this node.
DefineModelprotected · static · 2 overloads · since v2.27	Defines a model rule for the model of the node type specified by T using the rule which is to be applied to the node known under the path passed.
GetTypestatic · since v2.20	Retrieves the Type which implementes the node type which is identified by the typeId specified.
GetTypeInfostatic · 3 overloads · since v2.20	Retrieves the OpcNodeTypeInfo which declares the node type implemented by the T specified.
Implementprotected · virtual · since v2.26	Performs node specific implementation tasks to finalize the node creation before it can be used for the first time.
InitializeChildrenprotected · virtual · since v2.54	Initializes the children of the node.
InitializeDefaultsprotected · virtual	Initializes the default values used by the node implementation represented / required.
IsAccessiblevirtual · since v2.54	Determines whether the node is accessible using the context specified within the view identified by the viewId specified.
IsChangePending	Determines whether all of the changes specified by the change are pending on the node (see PendingChanges).
OnAfterAddedprotected · virtual · since v2.26	Raises the AfterAdded event using the event data specified.
OnAfterApplyChangesprotected · virtual · since v2.10	Raises the AfterApplyChanges event using the event data specified.
OnBeforeAddedprotected · virtual · since v2.26	Raises the BeforeAdded event using the event data specified.
OnBeforeApplyChangesprotected · virtual · since v2.10	Raises the BeforeApplyChanges event using the event data specified.
OnChangesUnhandledprotected · virtual · since v2.50	Raises the ChangesUnhandled event using the event data specified.
OnEventReportedprotected · virtual · since v2.54	Raises the EventReported event using the event data specified.
QueryEventsCoreprotected · virtual	Queries the events which belong to the node using the QueryEventsCallback, if one is assigned.
ReadAttributeValueCoreprotected · virtual	Determines the value of the attribute to read.
Referencesvirtual · since v2.50	Retrieves a sequence of immutable references between this node and other nodes.
RegisterTypestatic · 4 overloads · since v2.20	Registers the type defined by T as the node object type to create in case there a node instance is to be created for the type definition identified by the OpcNodeTypeAttribute defined on the T specified.
RegisterTypesstatic · 3 overloads · since v2.20	Registers all non-abstract types in the assembly specified which defines the OpcNodeTypeAttribute.
RemoveNotifiervirtual	Removes the node from the collection of notifiers (= event sources) of this node.
ReportEvent	Reports the eventData specified to all nodes this OpcNode is a notifier of.
ResolveModelprotected · virtual · since v2.54	Resolves the Model of the node.
ResumeModelChangeEventssince v2.50	Resumes model change tracking and events for this OpcNode and optionally for all children.
SuspendModelChangeEventssince v2.50	Temporarily suspends model change tracking and events for this OpcNode and optionally for all children.
UnregisterTypestatic · 2 overloads · since v2.20	Unregisters the previously registered (see RegisterType) type defined by T as the object type to not longer create for the type node identified by the OpcNodeTypeAttribute defined on the T specified.
UnregisterTypesstatic · 3 overloads · since v2.20	Unregisters all previously registered types (see RegisterTypes) in the assembly specified.
UpdateChanges2 overloads · since v2.10	Notifies about the changes on behalf of the node and removes pending changes which intersect with the changes specified.
WriteAttributeValueCoreprotected · virtual	Determines the value of the attribute to write.

Events

Name	Description
AfterAddedsince v2.26	Occurs after the node has been added to the address space.
AfterApplyChanges	Occurs after one or more changes on the node has been notified.
BeforeAddedsince v2.26	Occurs before the node is added to the address space.
BeforeApplyChanges	Occurs before one or more changes on the node are notified.
ChangesUnhandledsince v2.50	Occurs when changes applied with ApplyChanges are not monitored or discarded by all monitored items.
EventReportedsince v2.54	Occurs after an event has been reported using ReportEvent.

Applies to

Package	Versions
Opc.UaFx.Advanced	v2.5–v2.59