using OpcLabs.EasyOpc.DataAccess;
using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {
            var client = new EasyDAClient();
            Console.WriteLine("Reading item...");

            //THIS WORKS
            Console.WriteLine(client.ReadItemValue("localhost", "FactoryTalk Gateway", "[BCS_L71]Cleaning"));
            Console.WriteLine("Subscribing...");

            //THIS DO NOT WORK
            client.ItemChanged += Client_ItemChanged;
            int currentHandle = client.SubscribeItem("localhost", "FactoryTalk Gateway", "[BCS_L71]Cleaning", 1000, null);

            Console.ReadLine();
        }

        public static void Client_ItemChanged(object sender, EasyDAItemChangedEventArgs e)
        {
            //Use the event on the underlying EasyDAClient to raise an event 
            //parseable from elsewhere
            if (e.Vtq != null)
            {
                Console.WriteLine($"{e.Vtq.Timestamp} --> {e.ItemDescriptor.ItemId} is {e.Vtq.Value}");
            }

            if (e.Exception != null)
            {
                Console.WriteLine($"{e.Exception.Message}");
            }
        }
    }
}