EasyUAClientCore Class Methods

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

Public Methods

	Name	Description
	BrowseMultiple	Browses multiples nodes in server's address space. Starts from the specified nodes, and returns information about child nodes found.
	CallMultipleMethods	Calls multiple methods, using array of argument objects as an input.
	ChangeMultipleMonitoredItemSubscriptions	Changes parameters of multiple subscriptions, specifying objects containing all necessary arguments.
	ClearValidatedCertificates	Clears the list of validated certificates kept by the component.
	Clone	Overridden.
	CloseAll	Closes all unused sessions that are open to OPC-UA servers.
	CreateObjRef	Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from System.MarshalByRefObject)
	Discover	Discovers available OPC-UA applications or endpoints and returns information about them, using the specified discovery query.
	DiscoverGlobalServers	Overloaded. Globally discovers OPC-UA servers and returns information about them, using an empty filter, and the default GDS endpoint.
	DiscoverLocalServers	Discovers available OPC-UA servers and returns information about them, using the default discovery host.
	DiscoverNetworkServers	Overloaded. Discovers available OPC-UA servers on the network and returns information about them, using the default discovery host.
	Dispose	Overloaded. Overridden. Clean up any resources being used.
	Equals	(Inherited from object)
	GetHashCode	Serves as the default hash function. (Inherited from object)
	GetLifetimeService	Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from System.MarshalByRefObject)
	GetMonitoredItemArguments	Obtains parameters of certain monitored item subscription.
	GetMonitoredItemArgumentsDictionary	Obtains parameters of certain monitored item subscription.
	GetObjectData	Overridden.
	GetSchema	(Inherited from OpcLabs.BaseLib.Widgets.Widget)
	GetService	Overridden.
	GetType	Gets the System.Type of the current instance. (Inherited from object)
	InitializeLifetimeService	Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from System.MarshalByRefObject)
	Install	Creates an application instance certificate if it does not exist.
	IsKnownMonitoredItemSubscriptionHandle	Determines whether the given monitored item subscription handle is known to this client.
	PullMultipleDataChangeNotifications	Attempts to pull multiple OPC data change notifications subscribed to by the SubscribeMultipleMonitoredItems or SubscribeDataChange method.
	PullMultipleEventNotifications	Attempts to pull multiple OPC event notifications subscribed to by the SubscribeMultipleMonitoredItems or SubscribeEvent method.
	Raise<TEventArgs>	Raises a callback or event using a given handler and passing it specified event arguments, optionally specifying whether to enqueue the call. (Inherited from OpcLabs.BaseLib.Widgets.NotifyingWidget)
	ReadMultiple	Reads multiple attributes, using array of argument objects as an input.
	ReadXml	(Inherited from OpcLabs.BaseLib.Widgets.Widget)
	Reset	Sets the object properties back to their defaults.
	RetryAll	Forces a retrial on all objects that are in a failure state.
	SubscribeMultipleMonitoredItems	Subscribe to changes of multiple monitored items. The DataChangeNotification or EventNotification event is generated for each significant monitored item change.
	ToString	Overridden. Returns a string that represents the current object.
	Uninstall	Reverts the changes made by Install method.
	UnsubscribeAllMonitoredItems	Unsubscribe from changes of all monitored items.
	UnsubscribeMultipleMonitoredItems	Unsubscribe from changes of multiple monitored items, specifying an "enumerable" of integer handles.
	ValueEquals	Overloaded. Determines whether this object is value equal to the other.
	WriteMultiple	Writes data into multiple attributes, using array of argument objects as an input.
	WriteXml	(Inherited from OpcLabs.BaseLib.Widgets.Widget)

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Protected Methods

	Name	Description
	CallbackError	Overridden. Processes an error that has occurred during a callback. Processes an error that has occurred during a callback.
	Finalize	(Inherited from System.ComponentModel.Component)
	MemberwiseClone	Overloaded. Creates a shallow copy of the current System.MarshalByRefObject object. (Inherited from System.MarshalByRefObject)
	OnCallbackEnqueuerOverflow	Overridden. Infrastructure. Infrastructure.
	OnCallbackEnqueuerOverflowClearing	Overridden. Infrastructure. Infrastructure.
	OnContextTypesChanged	Infrastructure. (Inherited from OpcLabs.BaseLib.Widgets.Widget)
	ReadXmlElement	Overridden. Infrastructure. Infrastructure.
	SendCallbackError	Overridden. Processes an error that has occurred during sending of a callback. Processes an error that has occurred during a callback.
	Synchronize	Overloaded. Invokes the specified action in a synchronized manner. (Inherited from OpcLabs.BaseLib.Widgets.NotifyingWidget)
	WriteXmlElement	Overridden. Infrastructure. Infrastructure.

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Extension Methods

	Name	Description
	AsAlarmsAndConditionsClient	Derives an OPC UA global discovery client object from the current client object.
	AsCertificateManagementClient	Derives an OPC UA certificate management client object from the current client object.
	AsFileTransferClient	Derives an OPC UA file transfer client object from the current client object.
	AsGlobalDiscoveryClient	Derives an OPC UA global discovery client object from the current client object.
	AsPublishSubscribeClient	Derives an OPC UA publish-subscribe client object from the current client object.
	Browse	Overloaded. Browses the nodes in server's address space, given the browse arguments.
	BrowseDataNodes	Overloaded. Browses the data nodes in OPC server's address space. Starts from the specified node (or Objects folder), and returns information about child nodes found.
	BrowseDataVariables	Overloaded. Browses the Data Variables in OPC server's address space. Starts from the specified node (or Objects folder), and returns information about child nodes found.
	BrowseEventSources	Overloaded. Browses the EventSources in OPC server's address space. Starts from the specified node (or EventSources folder), and returns information about child nodes found.
	BrowseMethods	Overloaded. Browses the Methods in OPC server's address space. Starts from the specified node (or Objects folder), and returns information about child nodes found.
	BrowseNotifiers	Overloaded. Browses the Notifiers in OPC server's address space. Starts from the specified node (or Notifiers folder), and returns information about child nodes found.
	BrowseObjects	Overloaded. Browses the Objects in OPC server's address space. Starts from the specified node (or Objects folder), and returns information about child nodes found.
	BrowseObjectTypes	Overloaded. Browses the ObjectTypes in OPC server's address space. Starts from the specified node (or ObjectTypes folder), and returns information about child nodes found.
	BrowseOne	Overloaded. Browses the nodes in server's address space. Starts from the specified node, and returns information about child nodes found.
	BrowseProperties	Overloaded. Browses the Properties in OPC server's address space. Starts from the specified node (or Objects folder), and returns information about child nodes found.
	BrowseTree	Overloaded. Allows to traverse through OPC UA address space nodes under the specified node, using given browse arguments.
	BrowseVariables	Overloaded. Browses the Variables in OPC server's address space. Starts from the specified node (or Objects folder), and returns information about child nodes found.
	CallMethod	Overloaded. Calls (invokes) a method (or methods) in an OPC server. Input and output arguments can be passed to/from methods. .NET
	ChangeDataChangeSubscription	Changes parameters of a data change subscription. Specify the handle, a new sampling interval and absolute deadband value.
	ChangeMonitoredItemSubscription	Overloaded. Changes parameters of a subscription to a particular monitored item. It is more efficient to change multiple subscriptions using `MultipleMonitoredItemSubscriptions` method.
	ChangeMultipleDataChangeSubscriptions	Changes parameters of multiple data change subscriptions. Specify the handles, a new sampling interval and absolute deadband value.
	ChangeMultipleMonitoredItemSubscriptions	Overloaded. Changes parameters of multiple subscriptions. Specify the handles, and a new sampling interval.
	DiscoverGlobalApplications	Overloaded. Globally discovers OPC-UA applications that meet the specified filters and returns information about them, using the specified GDS endpoint.
	DiscoverGlobalServers	Overloaded. Globally discovers OPC-UA servers and returns information about them, using the specified GDS endpoint, and an empty filter.
	DiscoverLocalApplications	Overloaded. Discovers available OPC-UA applications and returns information about them, using the specified discovery host, and filtering by specified application types. This method uses the so-called Local Discovery Server (LDS). You can influence how the discovery works using the properties in static EasyUAClientCore.SharedParameters. Invokes the FindServers service. See also in Knowledge Base: Technical note-OPC UA Discovery in QuickOPC.
	DiscoverLocalEndpoints	Overloaded. Discovers available endpoints for a given server discovery URL. The query is performed using a GetEndpoints service of an OPC server specified by its discovery endpoint. See also in Knowledge Base: Technical note-OPC UA Discovery in QuickOPC.
	DiscoverLocalServers	Overloaded. Discovers available OPC-UA servers and returns information about them, using the specified discovery host. This method uses the so-called Local Discovery Server (LDS). You can influence how the discovery works using the properties in static EasyUAClientCore.SharedParameters. Invokes the FindServers service. See also in Knowledge Base: Technical note-OPC UA Discovery in QuickOPC.
	DiscoverNetworkServers	Overloaded. Discovers available OPC-UA servers on the network and returns information about them. This method uses the so-called Local Discovery Server with Multicast Extensions (LDS-NE). You can influence how the discovery works using the properties in EasyUAClientCore.SharedParameters. Invokes the FindServersOnNetwork service. See also in Knowledge Base: Technical note-OPC UA Discovery in QuickOPC.
	FindLocalApplications	Overloaded. Discovers available OPC-UA applications and returns information about them, using the specified discovery URI strings and filtering by specified application types. This method uses the discovery services on specified discovery endpoints. Invokes the FindServers service. The discovery may be attempted in parallel on the specified endpoints, depending on component settings. See also in Knowledge Base: Technical note-OPC UA Discovery in QuickOPC.
	PullDataChangeNotification	Attempts to pull an OPC data change notification subscribed to by the SubscribeMultipleMonitoredItems or SubscribeDataChange method.
	PullEventNotification	Attempts to pull an OPC event notification subscribed to by the SubscribeMultipleMonitoredItems or SubscribeEvent method.
	Read	Overloaded. Reads attribute data from an OPC server. Value, status code, and timestamps are returned.
	ReadDataType	Overloaded. Reads a value of DataType attribute of a node. If successful, the method returns the actual value of OPC attribute requested. This method also checks whether the returned value is not a `reference`, and is indeed of the OpcLabs.EasyOpc.UA.AddressSpace.UANodeId type. The returned value is therefore always a valid OpcLabs.EasyOpc.UA.AddressSpace.UANodeId.
	ReadDisplayName	Overloaded. Reads a value of DisplayName attribute of a node. If successful, the method returns the actual value of OPC attribute requested. This method also checks whether the returned value is not a `reference`, and is indeed of the System.String type. The returned value is therefore always a valid System.String.
	ReadMultiple	Overloaded. Reads values of multiple attributes.
	ReadMultipleDataTypes	Reads value of DataType attribute of multiple nodes, using array of argument objects as an input.
	ReadMultipleDisplayNames	Reads value of DisplayName attribute of multiple nodes, using array of argument objects as an input.
	ReadMultipleNodeClasses	Reads value of NodeClass attribute of multiple nodes, using array of argument objects as an input.
	ReadMultipleNodeIds	Reads value of NodeId attribute of multiple nodes, using array of argument objects as an input.
	ReadMultipleValues	Overloaded. Reads values of multiple attributes.
	ReadNodeClass	Overloaded. Reads a value of NodeClass attribute of a node. If successful, the method returns the actual value of OPC attribute requested. This method also checks whether the returned value is not a `reference`, and is indeed of the OpcLabs.EasyOpc.UA.AddressSpace.UANodeClass type. The returned value is therefore always a valid OpcLabs.EasyOpc.UA.AddressSpace.UANodeClass.
	ReadNodeId	Overloaded. Reads a value of NodeId attribute of a node. If successful, the method returns the actual value of OPC attribute requested. This method also checks whether the returned value is not a `reference`, and is indeed of the OpcLabs.EasyOpc.UA.AddressSpace.UANodeId type. The returned value is therefore always a valid OpcLabs.EasyOpc.UA.AddressSpace.UANodeId.
	ReadValue	Overloaded. Reads an attribute from an OPC server. Only the attribute's value is returned (status code and timestamps are not returned). The status code must be 'good' for this method to succeed; otherwise, a OpcLabs.EasyOpc.UA.OperationModel.UAException is thrown.
	RetrieveAllDataTypes	Overloaded. The starting node is included as the first element in the result value.
	SubscribeDataChange	Overloaded. Subscribe to a data change. Specify an endpoint descriptor, node id, and sampling interval.
	SubscribeEvent	Overloaded. Subscribe to an event. Specify an endpoint descriptor, node id, and sampling interval.
	SubscribeMonitoredItem	Overloaded. Subscribe to changes of a particular monitored item. For each significant monitored item change, either the IEasyUAClient.DataChangeNotification event is generated, or a specified callback method is invoked. It is more efficient to subscribe to multiple monitored items using SubscribeMultipleMonitoredItems method.
	SubscribeMultipleDataChanges	Subscribe to changes of multiple OPC monitored items with a data change callback method. The IEasyUAClient.DataChangeNotification event will be generated for each significant item change, and a specified callback method will be invoked.
	SubscribeMultipleEvents	Subscribe to changes of multiple OPC monitored items with an event notification callback method. The IEasyUAClient.EventNotification event will be generated for each significant item change, and a specified callback method will be invoked.
	SubscribeMultipleMonitoredItems	Subscribe to changes of multiple OPC monitored items. The IEasyUAClient.DataChangeNotification or IEasyUAClient.EventNotification event will be generated for each significant item change.
	TestEndpoint	Tests whether an operational connection can be established to the specified endpoint of an OPC UA server.
	UnsubscribeMonitoredItem	Unsubscribe from changes of a particular monitored item. Unsubscribe from monitored item, specifying its handle.
	WaitForMultiple	Overloaded. Subscribes to the specified nodes&attributes, and monitors their data until the predicates specified for each item become true, or the alloted time elapses.
	WaitForMultipleValues	Overloaded. Subscribes to the specified OPC-UA nodes&attributes, and monitors their data until they have at most the status severity specified for each item, an error occurs, or the alloted time elapses.
	WaitForValue	Overloaded. Subscribes to the specified node&attribute, and monitors its data until it has "good" status severity, an error occurs, or the alloted time elapses.
	Write	Overloaded. Writes into an attribute in an OPC server. Value, status code and timestamps are written.
	WriteMultipleValues	Writes values into multiple attributes, using array of argument objects as an input (status codes and timestamps are not written).
	WriteValue	Overloaded. Writes a value into an attribute an OPC server. Only the item value is written (status code and timestamps are not written).

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Reference

EasyUAClientCore Class
OpcLabs.EasyOpc.UA Namespace

.NET

Reference