HasCapability Method

Determines whether the application supports the specified capability.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ExtensionAttribute()>
Public Shared Function HasCapability( _
   ByVal applicationElement As UAApplicationElement, _
   ByVal capabilityIdentifier As String _
) As Nullable(Of Boolean)

'Usage
 
Dim applicationElement As UAApplicationElement
Dim capabilityIdentifier As String
Dim value As Nullable(Of Boolean)
 
value = UAApplicationElementExtension.HasCapability(applicationElement, capabilityIdentifier)

[Extension()]
public static Nullable<bool> HasCapability( 
   UAApplicationElement applicationElement,
   string capabilityIdentifier
)

[Extension()]
public:
static Nullable<bool> HasCapability( 
   UAApplicationElement^ applicationElement,
   String^ capabilityIdentifier
)

Parameters

applicationElement: The application element to be examined.
capabilityIdentifier: The capability identifier.

Return Value

Returns true when the application described by the supports the capability given by . Returns false when the application described by the does not support the capability given by . Returns null when the capability information for the server is not available.

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

The server capability identifiers are described in Annex D of OPC UA Part 12. For normative list, see http://www.opcfoundation.org/UA/schemas/1.04/ServerCapabilities.csv .

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

UAApplicationElementExtension Class
UAApplicationElementExtension Members

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