AF SDK Reference

AFValue Constructor (AFAttribute, Object, AFTime, UOM)

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AFValue Constructor (AFAttribute, Object, AFTime, UOM)

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Last UpdatedNov 18, 2025
2 minute read

This is the constructor for an AFValue object which specifies the Attribute, the value, timestamp, and unit of measure and uses defaults for all the other properties.

Namespace: OSIsoft.AF.Asset
Assembly: OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version: 3.1.1.1182

Syntax

public AFValue(
	AFAttribute attribute,
	Object newValue,
	AFTime timestamp,
	UOM uom
)

Public Sub New ( 
	attribute As AFAttribute,
	newValue As Object,
	timestamp As AFTime,
	uom As UOM
)

Dim attribute As AFAttribute
Dim newValue As Object
Dim timestamp As AFTime
Dim uom As UOM

Dim instance As New AFValue(attribute, 
	newValue, timestamp, uom)

public:
AFValue(
	AFAttribute^ attribute, 
	Object^ newValue, 
	AFTime timestamp, 
	UOM^ uom
)

new : 
        attribute : AFAttribute * 
        newValue : Object * 
        timestamp : AFTime * 
        uom : UOM -> AFValue

Parameters

attribute: Type: OSIsoft.AF.AssetAFAttribute
The AFAttribute to be associated with the new value.
newValue: Type: SystemObject
The new value to be assigned to the Value property.
timestamp: Type: OSIsoft.AF.TimeAFTime
The timestamp associated with the new value.
uom: Type: OSIsoft.AF.UnitsOfMeasureUOM
The UOM of the specified value.

Exceptions

Exception	Condition
InvalidCastException	This exception is thrown if the type of newValue does not support specifying a UOM.

Remarks

This constructor is useful for creating an AFValue to be used with the UpdateValues Overload method. The AFValue is associated with the specified Attribute. The default value for the Status property sets the IsGood flag and no other status bits are set.

AF SDK Reference