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Getting 'object' does not contain a definition for 'Name' and no extension method 'Name' accepting a first argument of type 'object' could be found (are you missing a using directive or an assembly reference?) error while retreiving PI tag values from PI

Question asked by shekar on Jul 27, 2015
Latest reply on Jul 27, 2015 by Dan Fishman

Hi Team,


When I try to get tag values from PI SDK through following below method


using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.HtmlControls;

using System.Data.OleDb;

using System.Data;

using System.Data.SqlClient;

using CommonAvailabiltyStatus;

using System.Text;

using PISDK;

using PISDKCommon;


public string getEndtimeOrEndtimePreviousTagValue(string strTagName, DateTime dtEndTime)


            string strEndtimeOrPreviousTagValue = "";

            PISDK.PIData myPIdata;

            PISDK.Server piServer;           

            PITimeServer.PITimeFormat formatToCall = new PITimeServer.PITimeFormat();




                PISDK.PISDK _pisdk = new PISDK.PISDK();

                piServer = _pisdk.Servers["E20052000"];


                PISDK.PIPoint mypoint = piServer.PIPoints[strTagName];

                myPIdata = mypoint.Data;

                //formatToCall.TimeZoneInfo = piServer.PITimeZoneInfo;

                //formatToCall.InputString = string.Format("{0}", dtEndTime);

                PISDK.PIValue Tagvalue = mypoint.Data.ArcValue(dtEndTime, PISDK.RetrievalTypeConstants.rtAtOrBefore);

                if (Tagvalue.Value.Name != "No Data")

                    strEndtimeOrPreviousTagValue = Tagvalue.Value.Name;


            catch (Exception ex)


                lblError.ForeColor = System.Drawing.Color.Red;

                lblError.Text = ex.Message.ToString();




                piServer = null;


            return strEndtimeOrPreviousTagValue;



I am getting above error at line 'Tagvalue.Value.Name'


Anyone can suggest what I am missing.