QuickOPC User's Guide and Reference
Description Property (AEAttributeElement)
Example 



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.AlarmsAndEvents.AddressSpace Namespace > AEAttributeElement Class : Description Property
Text name or description for the event attribute.
Syntax
'Declaration
 
<DefaultValueAttribute("")>
<NotNullAttribute()>
Public Property Description As String
'Usage
 
Dim instance As AEAttributeElement
Dim value As String
 
instance.Description = value
 
value = instance.Description
[DefaultValue("")]
[NotNull()]
public string Description {get; set;}
[DefaultValue("")]
[NotNull()]
public:
property String^ Description {
   String^ get();
   void set (    String^ value);
}
Example

.NET

// This example shows information available about OPC event attribute.

using System;
using System.Diagnostics;
using OpcLabs.EasyOpc.AlarmsAndEvents;
using OpcLabs.EasyOpc.AlarmsAndEvents.AddressSpace;
using OpcLabs.EasyOpc.OperationModel;

namespace DocExamples.AlarmsAndEvents._AEAttributeElement
{
    class Properties
    {
        public static void Main1()
        {
            // Instantiate the client object.
            var client = new EasyAEClient();

            AECategoryElementCollection categoryElements;
            try
            {
                categoryElements = client.QueryEventCategories("", "OPCLabs.KitEventServer.2");
            }
            catch (OpcException opcException)
            {
                Console.WriteLine("*** Failure: {0}", opcException.GetBaseException().Message);
                return;
            }

            foreach (AECategoryElement categoryElement in categoryElements)
            {
                Debug.Assert(categoryElement != null);

                Console.WriteLine("Category {0}:", categoryElement);
                foreach (AEAttributeElement attributeElement in categoryElement.AttributeElements)
                {
                    Debug.Assert(attributeElement != null);

                    Console.WriteLine("    Information about attribute {0}:", attributeElement);
                    Console.WriteLine("        .AttributeId: {0}", attributeElement.AttributeId);
                    Console.WriteLine("        .Description: {0}", attributeElement.Description);
                    Console.WriteLine("        .DataType: {0}", attributeElement.DataType);
                }
            }
        }
    }
}
# This example shows information available about OPC event attribute.

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

# Import .NET namespaces.
from OpcLabs.EasyOpc.AlarmsAndEvents import *
from OpcLabs.EasyOpc.OperationModel import *


# Instantiate the client object.
client = EasyAEClient()

try:
    categoryElements = IEasyAEClientExtension.QueryEventCategories(client, '', 'OPCLabs.KitEventServer.2')
except OpcException as opcException:
    print('*** Failure: ' + opcException.GetBaseException().Message, sep='')
    exit()

# Display results
for categoryElement in categoryElements:
    assert categoryElement is not None
    print('Category ', categoryElement, ':', sep='')
    for attributeElement in categoryElement.AttributeElements:
        assert attributeElement is not None
        print('    Information about attribute ', attributeElement, ':', sep='')
        print('        .AttributeId: ', attributeElement.AttributeId, sep='')
        print('        .Description: ', attributeElement.Description, sep='')
        print('        .DataType: ', attributeElement.DataType, sep='')
' This example shows information available about OPC event attribute.

Imports OpcLabs.EasyOpc.AlarmsAndEvents
Imports OpcLabs.EasyOpc.AlarmsAndEvents.AddressSpace
Imports OpcLabs.EasyOpc.OperationModel

Namespace AlarmsAndEvents._AEAttributeElement

    Friend Class Properties
        Public Shared Sub Main1()
            Dim client = New EasyAEClient()

            Dim categoryElements As AECategoryElementCollection
            Try
                categoryElements = client.QueryEventCategories("", "OPCLabs.KitEventServer.2")
            Catch opcException As OpcException
                Console.WriteLine("*** Failure: {0}", opcException.GetBaseException().Message)
                Exit Sub
            End Try

            For Each categoryElement As AECategoryElement In categoryElements
                Debug.Assert(categoryElement IsNot Nothing)

                Console.WriteLine("Category {0}:", categoryElement)
                For Each attributeElement As AEAttributeElement In categoryElement.AttributeElements
                    Debug.Assert(attributeElement IsNot Nothing)

                    Console.WriteLine("    Information about attribute {0}:", attributeElement)
                    Console.WriteLine("        .AttributeId: {0}", attributeElement.AttributeId)
                    Console.WriteLine("        .Description: {0}", attributeElement.Description)
                    Console.WriteLine("        .DataType: {0}", attributeElement.DataType)
                Next attributeElement
            Next categoryElement
        End Sub
    End Class

End Namespace
Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also