AF SDK Reference

AFData.InterpolatedValue Method

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AFData.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.Data
Assembly: OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version: 3.1.1.1182

Syntax

public AFValue InterpolatedValue(
	AFTime time,
	UOM desiredUOM
)

Public Function InterpolatedValue ( 
	time As AFTime,
	desiredUOM As UOM
) As AFValue

Dim instance As AFData
Dim time As AFTime
Dim desiredUOM As UOM
Dim returnValue As AFValue

returnValue = instance.InterpolatedValue(time, 
	desiredUOM)

public:
AFValue^ InterpolatedValue(
	AFTime time, 
	UOM^ desiredUOM
)

member InterpolatedValue : 
        time : AFTime * 
        desiredUOM : UOM -> AFValue

Parameters

time: Type: OSIsoft.AF.TimeAFTime
The time at which the value is desired.
desiredUOM: Type: OSIsoft.AF.UnitsOfMeasureUOM
The desired unit of measure for the returned value. If , then the value is returned in the unit of measure specified by the associated attribute's DefaultUOM property.

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