UAReadParameters Constructor(UAReadParameters)

Contains parameters for OPC-UA read operations, such as the maximum age of the value.

Because the UAReadParameters has implicit conversions from System.Double and OpcLabs.EasyOpc.UA.AddressSpace.UAQualifiedName, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a double precision floating point number (representing the maximum value age in milliseconds), or an OPC UA qualified name (representing the name of the encoding to be used) in place of this parameter, and the corresponding OPC UA read parameters will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromDouble or FromUAQualifiedName static method instead.

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

Initializes a new copy of the UAReadParameters object.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
Public Function New( _
   ByVal readParameters As UAReadParameters _
)

'Usage
 
Dim readParameters As UAReadParameters
 
Dim instance As New UAReadParameters(readParameters)

public UAReadParameters( 
   UAReadParameters readParameters
)

public:
UAReadParameters( 
   UAReadParameters^ readParameters
)

Parameters

readParameters

Contains parameters for OPC-UA read operations, such as the maximum age of the value.

The value of this parameter 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.

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

UAReadParameters Class
UAReadParameters Members
Overload List

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