using Opc.UaFx;
using System;
using Opc.UaFx.Client;
using Opc.UaFx.Client.Classic;
 
 
static void HandleDataChanged(
        object sender,
        OpcDataChangeReceivedEventArgs e)
{
    // Your code to execute on each data change.
    // The 'sender' variable contains the OpcMonitoredItem with the NodeId.
    OpcMonitoredItem item = (OpcMonitoredItem)sender;
 
    Console.WriteLine(
            "Data Change from NodeId '{0}': {1}",
            item.NodeId,
            e.Item.Value);
}
 
var client = new OpcClient("opc.tcp://192.168.2.6");
client.Connect();
OpcSubscription subscription = client.SubscribeDataChange(
        "ns=6;s=::Main:OPC_Photo_ID",
        HandleDataChanged);
subscription.PublishingInterval = 10;
 
bool i = true;
    while (i){ 
        //OpcValue idPhoto = client.ReadNode("ns=6;s=::Main:OPC_Photo_ID");
        //Console.WriteLine("Value: {0}", idPhoto);
        System.Threading.Thread.Sleep(1000);
}
 
client.Disconnect();

using System;
using OpcLabs.EasyOpc.UA;
 
namespace SimpleCapture
{
    class Program
    {
 
        static void Main(string[] args)
        {
            Program p = new Program();
            p.Run();
        }
 
        #region member functions
 
        void Run()
        {
            //Initialize OPC communication
            // Instantiate the client object
            var client = new EasyUAClient();
 
            try
            {
                //Quick OPC Client
                UAEndpointDescriptor endpointDescriptor = "opc.tcp://192.168.2.6";
 
                UANodeDescriptor nodeDescriptorPhotoID = "ns=6;s=::Main:OPC_Photo_ID";
 
                Console.WriteLine("Subscribing to OPC_Photo_ID...");
                // The callback is a lambda expression the displays the value
                int nodeHandle = 0;
                nodeHandle = client.SubscribeDataChange(endpointDescriptor, nodeDescriptorPhotoID, 10,
                    (sender, eventArgs) =>
                    {
                        if (eventArgs.Succeeded)
                        {
                            Console.WriteLine("Value: {0}", eventArgs.AttributeData.Value);
                            //photoName = eventArgs.AttributeData.Value.ToString();
                        }
                        else
                        {
                            //Console.WriteLine("*** Failure: {0}", eventArgs.ErrorMessage);
 
                        }
                    });
 
 
 
 
            }
            catch (Exception ex) { Console.WriteLine("Error: " + ex.Message); }
 
            bool i = true;
            while (i) ;
 
        }
 
 
        #endregion
    }
}