TryParse Method (UANodeId)

Converts the string representation of an OPC-UA node Id to equivalent node Id object. A return value indicates whether the conversion succeeded.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<CanBeNullAttribute()>
Public Shared Function TryParse( _
   ByVal s As String, _
   ByVal defaultNamespaceUriString As String, _
   ByRef nodeId As UANodeId _
) As IStringParsingError

'Usage
 
Dim s As String
Dim defaultNamespaceUriString As String
Dim nodeId As UANodeId
Dim value As IStringParsingError
 
value = UANodeId.TryParse(s, defaultNamespaceUriString, nodeId)

[CanBeNull()]
public static IStringParsingError TryParse( 
   string s,
   string defaultNamespaceUriString,
   out UANodeId nodeId
)

[CanBeNull()]
public:
static IStringParsingError^ TryParse( 
   String^ s,
   String^ defaultNamespaceUriString,
   [Out] UANodeId^ nodeId
)

Parameters

s

Expanded text of the node Id.

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

defaultNamespaceUriString

The default namespace to be used if no namespace is specified in the input string.

The value represents an OPC UA namespace URI string. Any string can be passed to this parameter (i.e. will not cause System.ArgumentException), but not all values make sense and will work when an operation using them is attempted.

The value of this parameter can be null (Nothing in Visual Basic).

nodeId

The converted node Id object.

The value of this parameter can be null (Nothing in Visual Basic).

Return Value

Returns null if was converted successfully; otherwise, returns an error object that describes the problem.

This method can return 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

OPC UA node Id, represented by the UANodeId class, directly identifies a node in a server's address space.

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

UANodeId Class
UANodeId Members
OPC UA Node IDs
Namespace indices in OPC UA Node Ids

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