WFA_psychometric_chart.Form1_main.UpdateMixNodeValuesToDB C# (CSharp) Method

        public void UpdateMixNodeValuesToDB(string NodeID,double xValue,double yValue,int AirFlowValue)
        {
            //We need to be able to change the air flows as well                      
            // string tableName = "tbl_" + buildingName + "_node_value";//currentNodeTableFromDB;  
            string tableName = "tbl_" + selectedBuildingList[0].BuildingName + "_node_value";//currentNodeTableFromDB;  
            string databasePath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
            string databaseFile = databasePath + @"\db_psychrometric_project.s3db";
            string connString = @"Data Source=" + databaseFile + ";Version=3;";

           // MessageBox.Show("HERE WE ARE"+ NodeID+"\n xValue = "+ xValue+"\n yval ="+yValue+"\n air flow= "+AirFlowValue);

            using (SQLiteConnection connection = new SQLiteConnection(connString))
            {
                connection.Open();
                string sql_string = "UPDATE " + tableName + "   set  xValue =@xVal ,  yValue=@yVal, airFlow=@airflow   where nodeID  =@id";
                SQLiteCommand command = new SQLiteCommand(sql_string, connection);
                command.CommandType = CommandType.Text;
                command.Parameters.AddWithValue("@xVal", xValue.ToString());
                command.Parameters.AddWithValue("@yVal", yValue.ToString());       
                command.Parameters.AddWithValue("@airflow", AirFlowValue);
                command.Parameters.AddWithValue("@id", NodeID);            
                command.ExecuteNonQuery();
            }

        }