Able to write to asp.Net listbox one record id at a time

Question

Dear all,

 

I want to trust that this mail meet you all in good health, i am processing some records from a database, i want each record unique id to be written into an asp.net ListBox after it has been processed,

 

i have tried

string SQLS = "Select * from Patient_Identifier where Patient_id <> '10'";
       var DF = new DataTable();
       DF = conn.GetMySQL(ref SQLS);
       foreach (DataRow p in DF.Rows)
       {
      PUID = p["identifier"].ToString().Trim();

           ListBox1.Items.Add(PUID + " added to Person and Patient Successfully..");
           PUID = "";
           cnt++;

       }

 the above sample will write these records ID at once into the ASP.NET ListBox, what i wanted is as after each record is processed it will write it unique ID to the ListBox before processing another one.

 

Thank you for yor help