Connectivity Software User's Guide and Reference
EasySparkplugPayloadSubscriptionArguments Constructor(EasySparkplugPayloadNotificationEventHandler,SparkplugEdgeNodeDescriptor)



OpcLabs.EasySparkplug Assembly > OpcLabs.EasySparkplug.OperationModel Namespace > EasySparkplugPayloadSubscriptionArguments Class > EasySparkplugPayloadSubscriptionArguments Constructor : EasySparkplugPayloadSubscriptionArguments Constructor(EasySparkplugPayloadNotificationEventHandler,SparkplugEdgeNodeDescriptor)
The callback to invoke for the notification.

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

The Sparkplug edge node descriptor.

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

Initializes a new instance of the class with the specified callback and edge node descriptor.
Syntax
'Declaration
 
Public Function New( _
   ByVal callback As EasySparkplugPayloadNotificationEventHandler, _
   ByVal edgeNodeDescriptor As SparkplugEdgeNodeDescriptor _
)
'Usage
 
Dim callback As EasySparkplugPayloadNotificationEventHandler
Dim edgeNodeDescriptor As SparkplugEdgeNodeDescriptor
 
Dim instance As New EasySparkplugPayloadSubscriptionArguments(callback, edgeNodeDescriptor)

Parameters

callback
The callback to invoke for the notification.

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

edgeNodeDescriptor
The Sparkplug edge node descriptor.

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

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

 

Sparkplug is a trademark of Eclipse Foundation, Inc. "MQTT" is a trademark of the OASIS Open standards consortium. Other related terms are trademarks of their respective owners. Any use of these terms on this site is for descriptive purposes only and does not imply any sponsorship, endorsement or affiliation.

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