Defines the evaluation of an expression over a time range.
OSIsoft.AFSDK (in OSIsoft.AFSDK.dll) Version: 188.8.131.52
Public Enumeration AFSampleType
Dim instance As AFSampleType
public enum class AFSampleType
Sampling / evaluation is done based on the archive events of all attributes used in the expression.
The expression is evaluated at each of the timestamps of these retrieved events.
This sampling algorithm is sometimes referred to as natural or event-based.
If there are no archive events in the expression (i.e. hour('*')>3), sampling / evaluation at start time only occurs.
Sampling / evaluation is done based on a passed expression interval. This is sometimes referred
to as evenly-spaced evaluation. This option is only supported for PI Points on PI Data Archive version 3.4 and above.
| Notes to Callers|
This method, property, or class is only available in the .NET 4 version of the SDK.
AFSDKSupported in: 2.10.5, 2.10, 2.9.5, 2.9, 2.8.5, 2.8, 2.7.5, 2.7, 2.6, 2.5