'Declaration
 
Public Function New( _
   ByVal callback As EasyUADataSetFieldMessageEventHandler, _
   ByVal state As Object, _
   ByVal dataSetSubscriptionDescriptor As UADataSetSubscriptionDescriptor, _
   ByVal dataSetFieldDescriptor As UADataSetFieldDescriptor _
)

'Usage
 
Dim callback As EasyUADataSetFieldMessageEventHandler
Dim state As Object
Dim dataSetSubscriptionDescriptor As UADataSetSubscriptionDescriptor
Dim dataSetFieldDescriptor As UADataSetFieldDescriptor
 
Dim instance As New EasyUASubscribeDataSetFieldArguments(callback, state, dataSetSubscriptionDescriptor, dataSetFieldDescriptor)

public EasyUASubscribeDataSetFieldArguments( 
   EasyUADataSetFieldMessageEventHandler callback,
   object state,
   UADataSetSubscriptionDescriptor dataSetSubscriptionDescriptor,
   UADataSetFieldDescriptor dataSetFieldDescriptor
)

public:
EasyUASubscribeDataSetFieldArguments( 
   EasyUADataSetFieldMessageEventHandler^ callback,
   Object^ state,
   UADataSetSubscriptionDescriptor^ dataSetSubscriptionDescriptor,
   UADataSetFieldDescriptor^ dataSetFieldDescriptor
)

Parameters

callback

A callback method to be invoked for each time a dataset field is received.

The value of this parameter cannot be null (Nothing in Visual Basic).

state

The state object (can be any value supplied by your code); available in event notifications.

The value of this parameter can be null (Nothing in Visual Basic).

dataSetSubscriptionDescriptor

Contains information needed to subscribe to a dataset.

The value of this parameter cannot be null (Nothing in Visual Basic).

dataSetFieldDescriptor

The descriptor for the dataset field.

Because the OpcLabs.EasyOpc.UA.PubSub.UADataSetFieldDescriptor has implicit conversions from System.Guid and System.String, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a GUID (representing the dataset field Id), or a string (representing the name of the dataset field) in place of this parameter, and the corresponding OPC UA dataset field descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the OpcLabs.EasyOpc.UA.PubSub.UADataSetFieldDescriptor.FromGuid or OpcLabs.EasyOpc.UA.PubSub.UADataSetFieldDescriptor.FromString static method instead.

The value of this parameter cannot be null (Nothing in Visual Basic).

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