QuickOPC User's Guide and Reference
Examples - OPC UA Layered Extensions - Retrieve sub-types of a data type

The example below determines sub-types of a a given data type:

// This example shows how to retrieve all sub-types of a given data type, recursively.

using System;
using OpcLabs.BaseLib.OperationModel.Generic;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace.Standard;
using OpcLabs.EasyOpc.UA.Extensions;

namespace UADocExamples._EasyUAClient
{
    class RetrieveAllDataTypes
    {
        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();

            // Retrieve all sub-types of the 'Structure' data type.
            ValueResult<UANodeDescriptor[]> result = client.RetrieveAllDataTypes(
                endpointDescriptor, UADataTypeIds.Structure);
            // Check if the operation succeeded. Use the ThrowIfFailed method instead if you want exception be thrown.
            if (!result.Succeeded)
            {
                Console.WriteLine("*** Failure: {0}", result.ErrorMessageBrief);
                return;
            }

            // Display results. Note that all node descriptors have node IDs in them; but the default display format shows 
            // the browse paths, which are more readable, when they are available.
            foreach (UANodeDescriptor nodeDescriptor in result.Value)
                Console.WriteLine(nodeDescriptor);

            // Example output:
            //
            //NodeId="Structure"
            //BrowsePath="[Structure]/Argument"
            //BrowsePath="[Structure]/StatusResult"
            //BrowsePath="[Structure]/UserTokenPolicy"
            //BrowsePath="[Structure]/ApplicationDescription"
            //BrowsePath="[Structure]/EndpointDescription"
            //BrowsePath="[Structure]/UserIdentityToken"
            //BrowsePath="[Structure]/EndpointConfiguration"
            //BrowsePath="[Structure]/SupportedProfile"
            //BrowsePath="[Structure]/BuildInfo"
            //BrowsePath="[Structure]/SoftwareCertificate"
            //BrowsePath="[Structure]/SignedSoftwareCertificate"
            //BrowsePath="[Structure]/AddNodesItem"
            //BrowsePath="[Structure]/AddReferencesItem"
            //BrowsePath="[Structure]/DeleteNodesItem"
            //BrowsePath="[Structure]/DeleteReferencesItem"
            //BrowsePath="[Structure]/ScalarTestType"
            //BrowsePath="[Structure]/ArrayTestType"
            //BrowsePath="[Structure]/CompositeTestType"
            //BrowsePath="[Structure]/RegisteredServer"
            //BrowsePath="[Structure]/ContentFilterElement"
            //BrowsePath="[Structure]/ContentFilter"
            //BrowsePath="[Structure]/FilterOperand"
            //BrowsePath="[Structure]/HistoryEvent"
            //BrowsePath="[Structure]/MonitoringFilter"
            //BrowsePath="[Structure]/RedundantServerDataType"
            //BrowsePath="[Structure]/SamplingIntervalDiagnosticsDataType"
            //BrowsePath="[Structure]/ServerDiagnosticsSummaryDataType"
            //BrowsePath="[Structure]/ServerStatusDataType"
            //BrowsePath="[Structure]/SessionDiagnosticsDataType"
            //BrowsePath="[Structure]/SessionSecurityDiagnosticsDataType"
            //BrowsePath="[Structure]/ServiceCounterDataType"
            //BrowsePath="[Structure]/SubscriptionDiagnosticsDataType"
            //BrowsePath="[Structure]/ModelChangeStructureDataType"
            //BrowsePath="[Structure]/Range"
            //BrowsePath="[Structure]/EUInformation"
            //BrowsePath="[Structure]/Annotation"
            //BrowsePath="[Structure]/ProgramDiagnosticDataType"
            //BrowsePath="[Structure]/SemanticChangeStructureDataType"
            //BrowsePath="[Structure]/HistoryEventFieldList"
            //BrowsePath="[Structure]/AggregateConfiguration"
            //BrowsePath="[Structure]/EnumValueType"
            //BrowsePath="[Structure]/TimeZoneDataType"
            //BrowsePath="[Structure]/EndpointUrlListDataType"
            //BrowsePath="[Structure]/NetworkGroupDataType"
            //BrowsePath="[Structure]/AxisInformation"
            //BrowsePath="[Structure]/XVType"
            //BrowsePath="[Structure]/ComplexNumberType"
            //BrowsePath="[Structure]/DoubleComplexNumberType"
            //BrowsePath="[Structure]/ScalarValueDataType"
            //BrowsePath="[Structure]/ArrayValueDataType"
            //BrowsePath="[Structure]/UserScalarValueDataType"
            //BrowsePath="[Structure]/UserArrayValueDataType"
            //BrowsePath="[Structure]/UserIdentityToken/AnonymousIdentityToken"
            //BrowsePath="[Structure]/UserIdentityToken/UserNameIdentityToken"
            //BrowsePath="[Structure]/UserIdentityToken/X509IdentityToken"
            //BrowsePath="[Structure]/UserIdentityToken/IssuedIdentityToken"
            //BrowsePath="[Structure]/FilterOperand/ElementOperand"
            //BrowsePath="[Structure]/FilterOperand/LiteralOperand"
            //BrowsePath="[Structure]/FilterOperand/AttributeOperand"
            //BrowsePath="[Structure]/FilterOperand/SimpleAttributeOperand"
            //BrowsePath="[Structure]/MonitoringFilter/EventFilter"
        }
    }
}
# This example shows how to retrieve all sub-types of a given data type, recursively.

# The QuickOPC package is needed. Install it using "pip install opclabs_quickopc".
import opclabs_quickopc

# Import .NET namespaces.
from OpcLabs.EasyOpc.UA import *
from OpcLabs.EasyOpc.UA.AddressSpace.Standard import *
from OpcLabs.EasyOpc.UA.Extensions import *
from OpcLabs.EasyOpc.UA.OperationModel import *


endpointDescriptor = UAEndpointDescriptor('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.
client = EasyUAClient()

# Retrieve all sub-types of the 'Structure' data type.
valueResult = IEasyUAClientExtension2.RetrieveAllDataTypes(client,
                                                           endpointDescriptor,
                                                           UANodeDescriptor(UADataTypeIds.Structure))
# Check if the operation succeeded. Use the ThrowIfFailed method instead if you want exception be thrown.
if not valueResult.Succeeded:
    print('*** Failure: ', valueResult.ErrorMessageBrief, sep='')
    exit()

# Display results. Note that all node descriptors have node IDs in them; but the default display format shows
# the browse paths, which are more readable, when they are available.
for nodeDescriptor in valueResult.Value:
    print(nodeDescriptor)

print()
print('Finished.')
' This example shows how to retrieve all sub-types of a given data type, recursively.

Imports OpcLabs.BaseLib.OperationModel.Generic
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.AddressSpace.Standard
Imports OpcLabs.EasyOpc.UA.Extensions

Namespace _EasyUAClient
    Friend Class RetrieveAllDataTypes
        Public Shared Sub Main1()

            Dim endpointDescriptor As UAEndpointDescriptor =
                "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
            Dim client = New EasyUAClient()

            ' Retrieve all sub-types of the 'Structure' data type.
            Dim result As ValueResult(Of UANodeDescriptor()) = client.RetrieveAllDataTypes( _
                endpointDescriptor, UADataTypeIds.Structure)
            ' Check if the operation succeeded. Use the ThrowIfFailed method instead if you want exception be thrown.
            If Not result.Succeeded Then
                Console.WriteLine("*** Failure: {0}", result.ErrorMessageBrief)
            End If

            ' Display results. Note that all node descriptors have node IDs in them; but the default display format shows 
            ' the browse paths, which are more readable, when they are available.
            For Each nodeDescriptor As UANodeDescriptor In result.Value
                Console.WriteLine(nodeDescriptor)
            Next nodeDescriptor

            ' Example output:
            '
            'NodeId="Structure"
            'BrowsePath="[Structure]/Argument"
            'BrowsePath="[Structure]/StatusResult"
            'BrowsePath="[Structure]/UserTokenPolicy"
            'BrowsePath="[Structure]/ApplicationDescription"
            'BrowsePath="[Structure]/EndpointDescription"
            'BrowsePath="[Structure]/UserIdentityToken"
            'BrowsePath="[Structure]/EndpointConfiguration"
            'BrowsePath="[Structure]/SupportedProfile"
            'BrowsePath="[Structure]/BuildInfo"
            'BrowsePath="[Structure]/SoftwareCertificate"
            'BrowsePath="[Structure]/SignedSoftwareCertificate"
            'BrowsePath="[Structure]/AddNodesItem"
            'BrowsePath="[Structure]/AddReferencesItem"
            'BrowsePath="[Structure]/DeleteNodesItem"
            'BrowsePath="[Structure]/DeleteReferencesItem"
            'BrowsePath="[Structure]/ScalarTestType"
            'BrowsePath="[Structure]/ArrayTestType"
            'BrowsePath="[Structure]/CompositeTestType"
            'BrowsePath="[Structure]/RegisteredServer"
            'BrowsePath="[Structure]/ContentFilterElement"
            'BrowsePath="[Structure]/ContentFilter"
            'BrowsePath="[Structure]/FilterOperand"
            'BrowsePath="[Structure]/HistoryEvent"
            'BrowsePath="[Structure]/MonitoringFilter"
            'BrowsePath="[Structure]/RedundantServerDataType"
            'BrowsePath="[Structure]/SamplingIntervalDiagnosticsDataType"
            'BrowsePath="[Structure]/ServerDiagnosticsSummaryDataType"
            'BrowsePath="[Structure]/ServerStatusDataType"
            'BrowsePath="[Structure]/SessionDiagnosticsDataType"
            'BrowsePath="[Structure]/SessionSecurityDiagnosticsDataType"
            'BrowsePath="[Structure]/ServiceCounterDataType"
            'BrowsePath="[Structure]/SubscriptionDiagnosticsDataType"
            'BrowsePath="[Structure]/ModelChangeStructureDataType"
            'BrowsePath="[Structure]/Range"
            'BrowsePath="[Structure]/EUInformation"
            'BrowsePath="[Structure]/Annotation"
            'BrowsePath="[Structure]/ProgramDiagnosticDataType"
            'BrowsePath="[Structure]/SemanticChangeStructureDataType"
            'BrowsePath="[Structure]/HistoryEventFieldList"
            'BrowsePath="[Structure]/AggregateConfiguration"
            'BrowsePath="[Structure]/EnumValueType"
            'BrowsePath="[Structure]/TimeZoneDataType"
            'BrowsePath="[Structure]/EndpointUrlListDataType"
            'BrowsePath="[Structure]/NetworkGroupDataType"
            'BrowsePath="[Structure]/AxisInformation"
            'BrowsePath="[Structure]/XVType"
            'BrowsePath="[Structure]/ComplexNumberType"
            'BrowsePath="[Structure]/DoubleComplexNumberType"
            'BrowsePath="[Structure]/ScalarValueDataType"
            'BrowsePath="[Structure]/ArrayValueDataType"
            'BrowsePath="[Structure]/UserScalarValueDataType"
            'BrowsePath="[Structure]/UserArrayValueDataType"
            'BrowsePath="[Structure]/UserIdentityToken/AnonymousIdentityToken"
            'BrowsePath="[Structure]/UserIdentityToken/UserNameIdentityToken"
            'BrowsePath="[Structure]/UserIdentityToken/X509IdentityToken"
            'BrowsePath="[Structure]/UserIdentityToken/IssuedIdentityToken"
            'BrowsePath="[Structure]/FilterOperand/ElementOperand"
            'BrowsePath="[Structure]/FilterOperand/LiteralOperand"
            'BrowsePath="[Structure]/FilterOperand/AttributeOperand"
            'BrowsePath="[Structure]/FilterOperand/SimpleAttributeOperand"
            'BrowsePath="[Structure]/MonitoringFilter/EventFilter"
        End Sub
    End Class
End Namespace

 

See Also

Examples - OPC UA Complex Data

Conceptual