TestEndpoint Method

Tests whether an operational connection can be established to the specified endpoint of an OPC UA server.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ExtensionAttribute()>
Public Shared Function TestEndpoint( _
   ByVal client As IEasyUAClient, _
   ByVal endpointDescriptor As UAEndpointDescriptor _
) As Byte

'Usage
 
Dim client As IEasyUAClient
Dim endpointDescriptor As UAEndpointDescriptor
Dim value As Byte
 
value = IEasyUAClientExtension2.TestEndpoint(client, endpointDescriptor)

[Extension()]
public static byte TestEndpoint( 
   IEasyUAClient client,
   UAEndpointDescriptor endpointDescriptor
)

[Extension()]
public:
static byte TestEndpoint( 
   IEasyUAClient^ client,
   UAEndpointDescriptor^ endpointDescriptor
)

Parameters

client: The client object that will perform the operation.
endpointDescriptor: The endpoint descriptor.

Return Value

Returns the service level of the server, if the test succeeds; otherwise, throws a OpcLabs.EasyOpc.UA.OperationModel.UAException.

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.
OpcLabs.EasyOpc.UA.OperationModel.UAException	The OPC UA operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause. This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

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.

OpcLabs.EasyOpc.UA.OperationModel.UAException

The OPC UA operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause.

This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

Remarks

The service level describes the ability of the server to provide its data to the client, and is determined by reading the OpcLabs.EasyOpc.UA.AddressSpace.Standard.UAVariableIds.Server_ServiceLevel node.

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

IEasyUAClientExtension2 Class
IEasyUAClientExtension2 Members

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