DAItemArguments Constructor(ServerDescriptor,DAItemDescriptor,Object)

Initializes a new instance of the class. Initializes a new instance of the class, with the specified OPC server and item descriptors, and a user-defined state object.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Function New( _
   ByVal serverDescriptor As ServerDescriptor, _
   ByVal itemDescriptor As DAItemDescriptor, _
   ByVal state As Object _
)

'Usage
 
Dim serverDescriptor As ServerDescriptor
Dim itemDescriptor As DAItemDescriptor
Dim state As Object
 
Dim instance As New DAItemArguments(serverDescriptor, itemDescriptor, state)

public DAItemArguments( 
   ServerDescriptor serverDescriptor,
   DAItemDescriptor itemDescriptor,
   object state
)

public:
DAItemArguments( 
   ServerDescriptor^ serverDescriptor,
   DAItemDescriptor^ itemDescriptor,
   Object^ state
)

Parameters

serverDescriptor: The OPC server involved in the operation.
itemDescriptor: The OPC item involved in the operation.
state: The state object (can be any value supplied by your code); available in event notifications.

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

DAItemArguments Class
DAItemArguments Members
Overload List

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