// This example shows how to read and display data of an attribute (value, timestamps, and status code).
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-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.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class Read
    {
        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 attribute of a node will be read.
            UAAttributeData attributeData;
            try
            {
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10853");
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            Console.WriteLine($"Value: {attributeData.Value}");
            Console.WriteLine($"ServerTimestamp: {attributeData.ServerTimestamp}");
            Console.WriteLine($"SourceTimestamp: {attributeData.SourceTimestamp}");
            Console.WriteLine($"StatusCode: {attributeData.StatusCode}");

            // Example output:
            //
            //Value: -2.230064E-31
            //ServerTimestamp: 11/6/2011 1:34:30 PM
            //SourceTimestamp: 11/6/2011 1:34:30 PM
            //StatusCode: Good
        }
    }
}

// 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://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-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.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 example shows how to read data from the device (data source) and display a value, timestamps, and status code.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-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.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class Read
    {
        public static void FromDevice()
        {
            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 attribute of a node will be read.
            // The parameters specify reading from the device (data source), which may be slow but provides the very latest
            // data.
            UAAttributeData attributeData;
            try
            {
                attributeData = client.Read(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10853", 
                    UAReadParameters.FromDevice);
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results
            Console.WriteLine("Value: {0}", attributeData.Value);
            Console.WriteLine("ServerTimestamp: {0}", attributeData.ServerTimestamp);
            Console.WriteLine("SourceTimestamp: {0}", attributeData.SourceTimestamp);
            Console.WriteLine("StatusCode: {0}", attributeData.StatusCode);

            // Example output:
            //
            //Value: -2.230064E-31
            //ServerTimestamp: 11/6/2011 1:34:30 PM
            //SourceTimestamp: 11/6/2011 1:34:30 PM
            //StatusCode: Good
        }
    }
}

// This example shows how to read data value of 3 nodes at once, from the device (data source).
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-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.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class ReadMultiple
    {
        public static void FromDevice()
        {
            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.
            // The parameters specify reading from the device (data source), which may be slow but provides the very latest
            // data.
            UAAttributeDataResult[] attributeDataResultArray = client.ReadMultiple(new[]
                {
                    new UAReadArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10845", 
                        UAReadParameters.FromDevice),
                    new UAReadArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10853", 
                        UAReadParameters.FromDevice),
                    new UAReadArguments(endpointDescriptor, "nsu=http://test.org/UA/Data/ ;i=10855", 
                        UAReadParameters.FromDevice)
                });

            // Display results
            foreach (UAAttributeDataResult attributeDataResult in attributeDataResultArray)
            {
                if (attributeDataResult.Succeeded)
                    Console.WriteLine("AttributeData: {0}", attributeDataResult.AttributeData);
                else
                    Console.WriteLine("*** Failure: {0}", attributeDataResult.ErrorMessageBrief);
            }
        }

        // Example output:
        //
        //AttributeData: 51 {System.Int16} @11/6/2011 1:49:19 PM @11/6/2011 1:49:19 PM; Good
        //AttributeData: -1993984 {System.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- {System.String} @11/6/2011 1:49:19 PM @11/6/2011 1:49:19 PM; Good            
    }
}

// This example shows how to read the node using a browse path.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-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.Navigation;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class Read
    {
        public static void BrowsePath()
        {
            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();

            // Create the node descriptor by parsing an absolute browse path.
            // The syntax below specifies a common default namespace URI for the elements of the browse path.
            UANodeDescriptor nodeDescriptor = UABrowsePath.Parse("[ObjectsFolder]/Data/Dynamic/Scalar/FloatValue", "http://test.org/UA/Data/");

            // Alternatively, the namespace URIs can be specified with each element of the browse separately.
            //UANodeDescriptor nodeDescriptor = UABrowsePath.Parse("[ObjectsFolder]/[nsu=http://test.org/UA/Data/;Data]/[nsu=http://test.org/UA/Data/;Dynamic]/[nsu=http://test.org/UA/Data/;Scalar]/[nsu=http://test.org/UA/Data/;FloatValue]", null);
            
            // Alternatively, the namespaces can be specified by indexes, separately with each element.
            //UANodeDescriptor nodeDescriptor = UABrowsePath.Parse("[ObjectsFolder]/2:Data/2:Dynamic/2:Scalar/2:FloatValue", null);

            // Obtain attribute data. By default, the Value attribute of a node will be read.
            UAAttributeData attributeData;
            try
            {
                attributeData = client.Read(endpointDescriptor, nodeDescriptor);
            }
            catch (UAException uaException)
            {
                Console.WriteLine($"*** Failure: {uaException.GetBaseException().Message}");
                return;
            }

            // Display results
            Console.WriteLine($"Value: {attributeData.Value}");
            Console.WriteLine($"ServerTimestamp: {attributeData.ServerTimestamp}");
            Console.WriteLine($"SourceTimestamp: {attributeData.SourceTimestamp}");
            Console.WriteLine($"StatusCode: {attributeData.StatusCode}");
        }
    }
}

// This example shows how to read the attributes of 4 OPC-UA nodes specified by browse paths at once, and display the
// results.
//
// Find all latest examples here: https://opclabs.doc-that.com/files/onlinedocs/OPCLabs-OpcStudio/Latest/examples.html .
// OPC client and subscriber examples in C# on GitHub: https://github.com/OPCLabs/Examples-QuickOPC-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.Navigation.Parsing;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples._EasyUAClient
{
    partial class ReadMultiple
    {
        public static void BrowsePath()
        {
            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();

            // Instantiate the browse path parser.
            var browsePathParser = new UABrowsePathParser {DefaultNamespaceUriString = "http://test.org/UA/Data/"};

            // Prepare arguments.
            // Note: Add error handling around the following statement if the browse paths are not guaranteed to be
            // syntactically valid.
            var readArgumentsArray = new[]
            {
                new UAReadArguments(endpointDescriptor, 
                    browsePathParser.Parse("[ObjectsFolder]/Data/Dynamic/Scalar/FloatValue")),
                new UAReadArguments(endpointDescriptor,
                    browsePathParser.Parse("[ObjectsFolder]/Data/Dynamic/Scalar/SByteValue")),
                new UAReadArguments(endpointDescriptor,
                    browsePathParser.Parse("[ObjectsFolder]/Data/Static/Array/UInt16Value")),
                new UAReadArguments(endpointDescriptor,
                    browsePathParser.Parse("[ObjectsFolder]/Data/Static/UserScalar/Int32Value"))
            };

            // Obtain attribute data.
            UAAttributeDataResult[] attributeDataResultArray = client.ReadMultiple(readArgumentsArray);

            // Display results.
            for (int i = 0; i < attributeDataResultArray.Length; i++)
            {
                UAAttributeDataResult attributeDataResult = attributeDataResultArray[i];
                if (attributeDataResult.Succeeded)
                    Console.WriteLine($"results[{i}].AttributeData: {attributeDataResult.AttributeData}");
                else
                    Console.WriteLine($"results[{i}] *** Failure: {attributeDataResult.ErrorMessageBrief}");
            }
        }

        // Example output:
        //results[0].AttributeData: 4.187603E+21 {Single} @2019-11-09T14:05:46.268 @@2019-11-09T14:05:46.268; Good
        //results[1].AttributeData: -98 {Int16} @2019-11-09T14:05:46.268 @@2019-11-09T14:05:46.268; Good
        //results[2].AttributeData: [58] {38240, 11129, 64397, 22845, 30525, ...} {Int32[]} @2019-11-09T14:00:07.543 @@2019-11-09T14:05:46.268; Good
        //results[3].AttributeData: 1280120396 {Int32} @2019-11-09T14:00:07.590 @@2019-11-09T14:05:46.268; Good
    }
}