OPC Studio User's Guide and Reference
DANodeDescriptor Constructor(String,BrowsePath)



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc.DataAccess Namespace > DANodeDescriptor Class > DANodeDescriptor Constructor : DANodeDescriptor Constructor(String,BrowsePath)
Contains OPC item identifier (empty string for the root or if unknown).

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

Contains the browse path for the OPC item.

Because the OpcLabs.BaseLib.Navigation.BrowsePath has an implicit conversion from System.String, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a string (containing an absolute browse path to be parsed) in place of this parameter, and the corresponding browse path object will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the OpcLabs.BaseLib.Navigation.BrowsePath.FromString static method instead. CAUTION: Parsing the browse path can throw OpcLabs.BaseLib.Navigation.Parsing.BrowsePathFormatException.

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

Initializes a new instance of the class, with specified item identifier, and browse path.
Syntax
'Declaration
 
Public Function New( _
   ByVal itemId As String, _
   ByVal browsePath As BrowsePath _
)
'Usage
 
Dim itemId As String
Dim browsePath As BrowsePath
 
Dim instance As New DANodeDescriptor(itemId, browsePath)
public DANodeDescriptor( 
   string itemId,
   BrowsePath browsePath
)
public:
DANodeDescriptor( 
   String^ itemId,
   BrowsePath^ browsePath
)

Parameters

itemId
Contains OPC item identifier (empty string for the root or if unknown).

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

browsePath
Contains the browse path for the OPC item.

Because the OpcLabs.BaseLib.Navigation.BrowsePath has an implicit conversion from System.String, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a string (containing an absolute browse path to be parsed) in place of this parameter, and the corresponding browse path object will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the OpcLabs.BaseLib.Navigation.BrowsePath.FromString static method instead. CAUTION: Parsing the browse path can throw OpcLabs.BaseLib.Navigation.Parsing.BrowsePathFormatException.

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

Remarks

This method or property does not throw any exceptions, aside from execution exceptions such as System.Threading.ThreadAbortException or System.OutOfMemoryException.

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