NodeDescriptor Property (DAPropertyArguments)

Gets or sets the OPC node descriptor that is an argument to the operation.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<DataMemberAttribute()>
Public Property NodeDescriptor As DANodeDescriptor

'Usage
 
Dim instance As DAPropertyArguments
Dim value As DANodeDescriptor
 
instance.NodeDescriptor = value
 
value = instance.NodeDescriptor

[DataMember()]
public DANodeDescriptor NodeDescriptor {get; set;}

[DataMember()]
public:
property DANodeDescriptor^ NodeDescriptor {
   DANodeDescriptor^ get();
   void set (    DANodeDescriptor^ value);
}

Property Value

The value of this property 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.

Remarks

Because the OpcLabs.EasyOpc.DataAccess.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 OpcLabs.EasyOpc.DataAccess.DANodeDescriptor value when setting this property, 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 FromString or FromDANodeElement static method instead.

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

DAPropertyArguments Class
DAPropertyArguments Members

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