OPC Studio User's Guide and Reference
TryParse Method (IUANodeIdParserExtension)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.AddressSpace.Parsing.Extensions Namespace > IUANodeIdParserExtension Class : TryParse Method
The OPC-UA node Id parser.

This is typically the OpcLabs.EasyOpc.UA.AddressSpace.Parsing.UANodeIdParser object.

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

Expanded text of the node Id.

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

A OpcLabs.EasyOpc.UA.AddressSpace.UANodeId object. The converted node Id object.

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

Converts the string representation of an OPC-UA node Id to equivalent node Id object. A return value indicates whether the conversion succeeded.
Syntax
'Declaration
 
<ExtensionAttribute()>
<CanBeNullAttribute()>
Public Shared Function TryParse( _
   ByVal nodeIdParser As IUANodeIdParser, _
   ByVal s As String, _
   ByRef nodeId As UANodeId _
) As IStringParsingError
'Usage
 
Dim nodeIdParser As IUANodeIdParser
Dim s As String
Dim nodeId As UANodeId
Dim value As IStringParsingError
 
value = IUANodeIdParserExtension.TryParse(nodeIdParser, s, nodeId)
[Extension()]
[CanBeNull()]
public static IStringParsingError TryParse( 
   IUANodeIdParser nodeIdParser,
   string s,
   out UANodeId nodeId
)
[Extension()]
[CanBeNull()]
public:
static IStringParsingError^ TryParse( 
   IUANodeIdParser^ nodeIdParser,
   String^ s,
   [Out] UANodeId^ nodeId
) 

Parameters

nodeIdParser
The OPC-UA node Id parser.

This is typically the OpcLabs.EasyOpc.UA.AddressSpace.Parsing.UANodeIdParser object.

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

s
Expanded text of the node Id.

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

nodeId
A OpcLabs.EasyOpc.UA.AddressSpace.UANodeId object. The converted node Id object.

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

Return Value

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

This method can return null (Nothing in Visual Basic).

Exceptions
ExceptionDescription

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

This is an extension method (info: C#, VB.NET). In languages that have support for extensions methods (such as C# and VB.NET), you can use the extension method as if it were a regular method on the object that is its first parameter. In other languages (such as with Python.NET), you will call the extension as a static method, and pass it the object on which it acts as its first parameter.

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