OPC Studio User's Guide and Reference
ServerDescriptor Constructor(ServerDescriptor)



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc Namespace > ServerDescriptor Class > ServerDescriptor Constructor : ServerDescriptor Constructor(ServerDescriptor)
The server descriptor object to be copied from.

Because the ServerDescriptor has an implicit conversion from System.Guid, System.String and ServerElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a GUID (representing the CLSID of the server), a string (representing the so-called OPC server descriptor string, such as a ProgID or the URL of the server), or a ServerElement object (result from OPC browsing), in place of this parameter, and the corresponding OPC server descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromGuid, FromString or FromServerElement static method instead.

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

Initializes a new copy of the ServerDescriptor object.
Syntax
'Declaration
 
Public Function New( _
   ByVal serverDescriptor As ServerDescriptor _
)
'Usage
 
Dim serverDescriptor As ServerDescriptor
 
Dim instance As New ServerDescriptor(serverDescriptor)
public ServerDescriptor( 
   ServerDescriptor serverDescriptor
)
public:
ServerDescriptor( 
   ServerDescriptor^ serverDescriptor
)

Parameters

serverDescriptor
The server descriptor object to be copied from.

Because the ServerDescriptor has an implicit conversion from System.Guid, System.String and ServerElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a GUID (representing the CLSID of the server), a string (representing the so-called OPC server descriptor string, such as a ProgID or the URL of the server), or a ServerElement object (result from OPC browsing), in place of this parameter, and the corresponding OPC server descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromGuid, FromString or FromServerElement static method instead.

The value of this parameter cannot be 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.

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