AccessReadOnlySecurityKeyService Method (_EasyUAPublishSubscribeClient)

The endpoint descriptor of the OPC UA server containing the PubSub Security Key Service (SKS) model.

Because the OpcLabs.EasyOpc.UA.UAEndpointDescriptor has implicit conversions from System.String and System.Uri, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a string (representing the endpoint URL, or a so-called OPC UA endpoint descriptor string), or a System.Uri object, in place of this parameter, and the corresponding endpoint descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the OpcLabs.EasyOpc.UA.UAEndpointDescriptor.FromString or OpcLabs.EasyOpc.UA.UAEndpointDescriptor.FromUri static method instead.

If you are using OPC Wizard (for server development), an implicit conversion from OpcLabs.EasyOpc.UA.EasyUAServerCore can be used in the same way to simply pass the server object in place of this parameter, which will use its OpcLabs.EasyOpc.UA.EasyUAServerCore.EffectiveServerDescriptor property for the connection.

The value of this parameter cannot be null (Nothing in Visual Basic).

Gives read-only access to PubSub security key service (SKS) provided by the specified OPC UA server.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<NotNullAttribute()>
Function AccessReadOnlySecurityKeyService( _
   ByVal endpointDescriptor As Object _
) As _UAReadOnlyPubSubSecurityKeyService

'Usage
 
Dim instance As _EasyUAPublishSubscribeClient
Dim endpointDescriptor As Object
Dim value As _UAReadOnlyPubSubSecurityKeyService
 
value = instance.AccessReadOnlySecurityKeyService(endpointDescriptor)

[NotNull()]
_UAReadOnlyPubSubSecurityKeyService AccessReadOnlySecurityKeyService( 
   object endpointDescriptor
)

[NotNull()]
_UAReadOnlyPubSubSecurityKeyService^ AccessReadOnlySecurityKeyService( 
   Object^ endpointDescriptor
)

Parameters

endpointDescriptor

The endpoint descriptor of the OPC UA server containing the PubSub Security Key Service (SKS) model.

The value of this parameter cannot be null (Nothing in Visual Basic).

Return Value

Returns an interface that provides read-only access to PubSub security key service (SKS) .

This method never returns null (Nothing in Visual Basic).

Exceptions

Exception Description

Exception	Description
System.ArgumentNullException	A `null` reference (`Nothing` in Visual Basic) is passed to a method that does not accept it as a valid argument. This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

System.ArgumentNullException

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

You can use the HasConfigurationModel method to determine whether the given server provides a PubSub Security Key Service (SKS) model. Operations on the returned OpcLabs.EasyOpc.UA.PubSub.SecurityKeyService.IUAReadOnlyPubSubSecurityKeyService will fail if it does not.

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

Requirements

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

Reference

_EasyUAPublishSubscribeClient Interface
_EasyUAPublishSubscribeClient Members

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