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PIPoint.UpdateValues only updating the snapshot value?

Question asked by v_dahbura on Jan 29, 2020
Latest reply on Feb 5, 2020 by v_dahbura

Hi all. Whenever I attempt to run the following code to update a point with data from a datatable out of a .csv file it looks like I am only writing/updating the snapshot value of the point, what am I doing wrong here?: 


private static void UpdatePiPoints(DataTable csvTable)
   int rowCount = csvTable.Rows.Count;
   string tagName, startTime, endTime;
   tagName = startTime = endTime = string.Empty;
   DataRow firstRow = csvTable.Rows[0];
   DataRow lastRow = csvTable.Rows[rowCount - 1];

   tagName = firstRow["Tag"].ToString();
   startTime = firstRow["Timestamp"].ToString();
   endTime = lastRow["Timestamp"].ToString();
   IList<AFValue> vals = new List<AFValue>();


   if (AFData.BufferOption != AFBufferOption.Buffer)
      AFData.BufferOption = AFBufferOption.Buffer;
      Console.WriteLine("Current Buffer Option for this instance has been changed to: {0}",       AFData.BufferOption);


   PIPoint tag = PIPoint.FindPIPoint(piServer, tagName);

   foreach (DataRow row in csvTable.Rows)
      DateTime timeStamp = DateTime.Parse(row["TimeStamp"].ToString());
      timeStamp = DateTime.SpecifyKind(timeStamp, DateTimeKind.Local);

      AFTime timeVal = new AFTime(timeStamp).LocalTime;

      AFValue val = new AFValue(row["Value"].ToString(), timeVal);


   tag.UpdateValues(vals, AFUpdateOption.InsertNoCompression);  




This is what the .csv file looks like:


tag, timestamp, value
Admin.DataTag_001,1/1/2018 12:00:00 AM,10.10
Admin.DataTag_001,1/2/2018 12:00:00 AM,27.20
Admin.DataTag_001,1/3/2019 12:00:00 AM,33.30


For example, the code above only updates the point with the last row in the .csv file.