// This example shows how to search for nodes in the server by their node Id.
// You can use any OPC UA client, including our Connectivity Explorer and OpcCmd utility, to connect to the server. 
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client, server and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-OPCStudio-CSharp .
// Missing some example? Ask us for it on our Online Forums, https://www.opclabs.com/forum/index ! You do not have to own
// a commercial license in order to use Online Forums, and we reply to every post.

using System;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.NodeSpace;

namespace UAServerDocExamples._EasyUAServer
{
    class FindServerNode
    {
        public static void Main1()
        {
            // Instantiate the server object.
            // By default, the server will run on endpoint URL "opc.tcp://localhost:48040/".
            var server = new EasyUAServer();

            // Define some nodes in the server.
            UADataVariable constantDataVariable = UADataVariable.CreateIn(server.Objects, "Constant").ConstantValue("abc");
            UADataVariable nestedConstantDataVariable = UADataVariable.CreateIn(constantDataVariable, "NestedConstant").ConstantValue(42);
            
            // Try to find the nested constant data variable. It will be found.
            UAServerNode serverNode1 = server.FindServerNode("nsu=http://opclabs.com/OpcUA/Custom/Objects ;s=Constant.NestedConstant");
            Console.WriteLine(serverNode1);

            // Try to find an unknown server node. A null reference will be returned.
            UAServerNode serverNode2 = server.FindServerNode("nsu=http://opclabs.com/OpcUA/Custom/Objects ;s=Unknown");
            Console.WriteLine(serverNode2);
        }
    }
}