ReadValueFunction Method (SparkplugMetricExtension)

Modifies the metric to provide value for the pull data provision model by a specified function.

This method always makes the metric readable, but that does not mean it automatically makes it non-writable. If you need a metric that is readable and non-writable, combine this method with calling Writable(SparkplugMetric,Boolean) method with the 'writable' parameter set to false.

Overload List

Overload	Description
ReadValueFunction<TValue>(SparkplugMetric,Func<TValue>)	Specifies the read value function, for the pull data provision model.
ReadValueFunction(SparkplugMetric,SparkplugDataType,Func<Object>)	Specifies the Sparkplug data type and read value function, for the pull data provision model.
ReadValueFunction(SparkplugMetric,Type,Func<Object>)	Specifies value type and read value function, for the pull data provision model.

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

SparkplugMetricExtension Class
SparkplugMetricExtension Members

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