DAItemDescriptor Constructor(DANodeDescriptor)

An node descriptor object to be copied from.

Because the DANodeDescriptor has an implicit conversion from System.String and OpcLabs.EasyOpc.DataAccess.AddressSpace.DANodeElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a string (representing the qualified name of the node), or a OpcLabs.EasyOpc.DataAccess.AddressSpace.DANodeElement object (result from OPC browsing), in place of this parameter, and the corresponding OPC DA node descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the DANodeDescriptor.FromString or DANodeDescriptor.FromDANodeElement static method instead.

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

Initializes a new instance of the class, from specified node descriptor.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Function New( _
   ByVal nodeDescriptor As DANodeDescriptor _
)

'Usage
 
Dim nodeDescriptor As DANodeDescriptor
 
Dim instance As New DAItemDescriptor(nodeDescriptor)

public DAItemDescriptor( 
   DANodeDescriptor nodeDescriptor
)

public:
DAItemDescriptor( 
   DANodeDescriptor^ nodeDescriptor
)

Parameters

nodeDescriptor

An node descriptor object to be copied from.

The value of this parameter cannot be 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.

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

DAItemDescriptor Class
DAItemDescriptor Members
Overload List

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