OnReadDataChanged Method

Called when the value of the ReadData property has changed.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Protected Overridable Sub OnReadDataChanged( _
   ByVal oldValue As SparkplugData _
)

'Usage
 
Dim instance As SparkplugMetric
Dim oldValue As SparkplugData
 
instance.OnReadDataChanged(oldValue)

protected virtual void OnReadDataChanged( 
   SparkplugData oldValue
)

protected:
virtual void OnReadDataChanged( 
   SparkplugData^ oldValue
)

Parameters

oldValue: The old value of the property.
The value of this parameter cannot be null (Nothing in Visual Basic).

Exceptions

Exception Description

Exception	Description
System.ArgumentNullException	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.

System.ArgumentNullException

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

Reference

SparkplugMetric Class
SparkplugMetric Members
ReadData Property

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