AF SDK Reference

AFDataReference.InterpolatedValue Method

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AFDataReference.InterpolatedValue Method

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Last UpdatedNov 18, 2025
3 minute read

Returns a single AFValue whose value is interpolated at the passed time.

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

Syntax

public virtual AFValue InterpolatedValue(
	AFTime time,
	AFAttributeList inputAttributes,
	AFValues inputValues
)

Public Overridable Function InterpolatedValue ( 
	time As AFTime,
	inputAttributes As AFAttributeList,
	inputValues As AFValues
) As AFValue

Dim instance As AFDataReference
Dim time As AFTime
Dim inputAttributes As AFAttributeList
Dim inputValues As AFValues
Dim returnValue As AFValue

returnValue = instance.InterpolatedValue(time, 
	inputAttributes, inputValues)

public:
virtual AFValue^ InterpolatedValue(
	AFTime time, 
	AFAttributeList^ inputAttributes, 
	AFValues^ inputValues
)

abstract InterpolatedValue : 
        time : AFTime * 
        inputAttributes : AFAttributeList * 
        inputValues : AFValues -> AFValue 
override InterpolatedValue : 
        time : AFTime * 
        inputAttributes : AFAttributeList * 
        inputValues : AFValues -> AFValue

Parameters

time: Type: OSIsoft.AF.TimeAFTime
The time at which the value is desired.
inputAttributes: Type: OSIsoft.AF.AssetAFAttributeList
The input attributes as previously specified by the data reference in the GetInputs(Object) call. The index of the values will match the index of the corresponding attribute previously returned. These values must be converted to the appropriate UOM required by this data reference.
inputValues: Type: OSIsoft.AF.AssetAFValues
The input values are supplied to the data reference based on the attributes returned in the GetInputs(Object) call. The index of the values will match the index of the corresponding attribute previously returned. These values must be converted to the appropriate UOM required by this data reference.

Return Value

Type: AFValue
Returns the AFValue for the attribute. If AFValue.IsGood returned by the data reference is , then the returned value is converted to the proper UOM and Type. The timestamp of the value will be at the requested time.

Exceptions

Exception	Condition
NotSupportedException	The data reference does not support this method.

Remarks

To retrieve recorded values for multiple attributes, use the AFListData.InterpolatedValue to achieve better performance.

Notes to Callers
This method, property, or class is not available in the legacy .NET 3.5 version of the SDK.

Security Note
You must have ReadData security rights to read a data value.

AF SDK Reference