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



OpcLabs.EasyOpcClassicCore Assembly > OpcLabs.EasyOpc Namespace > ServerDescriptor Class > ServerDescriptor Constructor : ServerDescriptor Constructor(String)
Contains the descriptor string for the server.

The value represents a server descriptor string. Any string can be passed to this parameter (i.e. will not cause System.ArgumentException), but not all values make sense and will work when an operation using them is attempted. The server descriptor string is typically the ProgID (or {CLSID}) of the object, a string in the form "\\machineName\serverClass", or a URI of the object.

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

Initializes a new instance of the class, with specified server class (ProgID) or a URL string.
Syntax
'Declaration
 
Public Function New( _
   ByVal descriptorString As String _
)
'Usage
 
Dim descriptorString As String
 
Dim instance As New ServerDescriptor(descriptorString)
public ServerDescriptor( 
   string descriptorString
)
public:
ServerDescriptor( 
   String^ descriptorString
)

Parameters

descriptorString
Contains the descriptor string for the server.

The value represents a server descriptor string. Any string can be passed to this parameter (i.e. will not cause System.ArgumentException), but not all values make sense and will work when an operation using them is attempted. The server descriptor string is typically the ProgID (or {CLSID}) of the object, a string in the form "\\machineName\serverClass", or a URI of the object.

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.

Remarks

The descriptorString may contain one of the following:

In languages that support implicit conversions (such as C# or VB.NET), in many cases you do not have call this constructor explicitly. When indicated, a call to an available equivalent implicit conversion operator will be created by the compiler automatically.

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