// This example shows how to read data (value, timestamps, and status code) of 3 attributes at once. In this example,
// we are reading a Value attribute of 3 different nodes, but the method can also be used to read multiple attributes
// of the same node.
//
// 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 .
// Missing some example? Ask us for it on our Online Forums, https://forum.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.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class ReadMultiple
    {
        public static void Main1()
        {
            UAEndpointDescriptor endpointDescriptor =
                "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer";
            // or "http://opcua.demo-this.com:51211/UA/SampleServer" (currently not supported)
            // or "https://opcua.demo-this.com:51212/UA/SampleServer/"

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

            // Obtain attribute data. By default, the Value attributes of the nodes will be read.
            UAAttributeDataResult[] attributeDataResultArray = client.ReadMultiple(new[]
                {
                    new UAReadArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10845"),
                    new UAReadArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10853"),
                    new UAReadArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10855")
                });

            // Display results.
            foreach (UAAttributeDataResult attributeDataResult in attributeDataResultArray)
            {
                if (attributeDataResult.Succeeded)
                    Console.WriteLine($"AttributeData: {attributeDataResult.AttributeData}");
                else
                    Console.WriteLine($"*** Failure: {attributeDataResult.ErrorMessageBrief}");
            }
        }

        // Example output:
        //
        //AttributeData: 51 {Int16} @11/6/2011 1:49:19 PM @11/6/2011 1:49:19 PM; Good
        //AttributeData: -1993984 {Single} @11/6/2011 1:49:19 PM @11/6/2011 1:49:19 PM; Good
        //AttributeData: Yellow% Dragon Cat) White Blue Dog# Green Banana- {String} @11/6/2011 1:49:19 PM @11/6/2011 1:49:19 PM; Good            
    }
}

// This KEPServerEX/UA example shows how to read data (value, timestamps, and status code) of 3 attributes at once. In this
// example, we are reading a Value attribute of 3 different nodes, but the method can also be used to read multiple
// attributes of the same node.
//
// 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 .
// Missing some example? Ask us for it on our Online Forums, https://forum.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.AddressSpace;
using OpcLabs.EasyOpc.UA.OperationModel;

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

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

            // Obtain attribute data. By default, the Value attributes of the nodes will be read.
            UAAttributeDataResult[] attributeDataResultArray = client.ReadMultiple(new[]
                {
                    // The UANodeId.KEPServerEX(...) helper method simplifies creation of node IDs for KEPServerEX/UA nodes.
                    new UAReadArguments(endpointDescriptor, UANodeId.KEPServerEX("Simulation Examples.Functions.Random1")),
                    new UAReadArguments(endpointDescriptor, UANodeId.KEPServerEX("Simulation Examples.Functions.Ramp1")),
                    new UAReadArguments(endpointDescriptor, UANodeId.KEPServerEX("Simulation Examples.Functions.Sine1")),
                    new UAReadArguments(endpointDescriptor, UANodeId.KEPServerEX("Simulation Examples.Functions.User1"))
                });

            // Display results.
            foreach (UAAttributeDataResult attributeDataResult in attributeDataResultArray)
            {
                if (attributeDataResult.Succeeded)
                    Console.WriteLine($"AttributeData: {attributeDataResult.AttributeData}");
                else
                    Console.WriteLine($"*** Failure: {attributeDataResult.ErrorMessageBrief}");
            }
        }
    }
}