QuickOPC User's Guide and Reference
SubscribeDataSetField(IEasyUASubscriber,UASubscribeDataSetArguments,UADataSetFieldDescriptor,EasyUADataSetFieldMessageEventHandler) Method



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.PubSub Namespace > IEasyUASubscriberExtension Class > SubscribeDataSetField Method : SubscribeDataSetField(IEasyUASubscriber,UASubscribeDataSetArguments,UADataSetFieldDescriptor,EasyUADataSetFieldMessageEventHandler) Method
The subscriber object that will perform the operation.
Holds all arguments needed to subscribe to a dataset in OPC UA PubSub.
The descriptor for the dataset field.
A callback method to be invoked for each time a dataset field is received.
Subscribes to a single dataset field from a dataset, using dataset arguments object, a field name, and a callback.
Syntax

Parameters

subscriber
The subscriber object that will perform the operation.
subscribeDataSetArguments
Holds all arguments needed to subscribe to a dataset in OPC UA PubSub.
dataSetFieldDescriptor
The descriptor for the dataset field.
callback
A callback method to be invoked for each time a dataset field is received.

Return Value

Returns a dataset field subscription handle that can be used to change the subscription, obtain its arguments, or unsubscribe.
Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

There is no corresponding method in COM.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also