// This KEPServerEX/UA example shows how to read value of a single node, and display it.
//
// Find all latest examples here: https://www.doc-that.com/files/onlinedocs/OPCLabs-ConnectivityStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-ConnectivityStudio-CSharp .
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using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.Specialized
{
    partial class Kepware_KEPServerEX_UA
    {
        public static void ReadValue()
        {
            UAEndpointDescriptor endpointDescriptor = "opc.tcp://localhost:49320";  // default KEPServerEX/UA endpoint 

            // Instantiate the client object.
            var client = new EasyUAClient();

            Console.WriteLine("Obtaining value of a node...");
            object value;
            try
            {
                value = client.ReadValue(endpointDescriptor,
                    // The UANodeId.KEPServerEX(...) helper method simplifies creation of node IDs for KEPServerEX/UA nodes.
                    UANodeId.KEPServerEX("Simulation Examples.Functions.Random1"));
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            Console.WriteLine($"value: {value}");
        }
    }
}