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PIPoint.UpdateValue - how to use references such as T, Y, "*", "*-2d"

Question asked by nigeloldham on Sep 24, 2018
Latest reply on Sep 24, 2018 by nigeloldham


Hopefully this is an easy one.

If you want to write values to PI tags using AF SDK, I can use this code, but I really don't want to pass the DateTime to the AFValue,

Is there a way to pass "*", "*-2d", "*-23s", "T", or "Y" as the datetime?  Or does AFSDK only use a specific datetime in .NET?



public void Update_PITag_with_SpecificTime(String PITagName, String PIValue, DateTime PI_Timestamp)






          myPIPoint = PIPoint.FindPIPoint(DataArchive, PITagName);

          AFValue AFValue2 = new AFValue();

          AFValue2.Value = PIValue;

          AFValue2.Timestamp = PI_Timestamp;

          myPIPoint.UpdateValue(AFValue2, OSIsoft.AF.Data.AFUpdateOption.Replace);


     catch (Exception ex)