WaitForMultipleValues(IEasyUAClient,IReadOnlyList<UAMonitoredItemArguments>,UASeverity) Method

Subscribes to the specified OPC-UA nodes&attributes, and monitors their data until they have at most the status severity specified for each item, an error occurs, or the alloted time elapses.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<ExtensionAttribute()>
<ElementsNotNullAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function WaitForMultipleValues( _
   ByVal client As IEasyUAClient, _
   ByVal monitoredItemArgumentsList As IReadOnlyList(Of UAMonitoredItemArguments), _
   ByVal maximumSeverity As UASeverity _
) As ValueResult()

'Usage
 
Dim client As IEasyUAClient
Dim monitoredItemArgumentsList As IReadOnlyList(Of UAMonitoredItemArguments)
Dim maximumSeverity As UASeverity
Dim value() As ValueResult
 
value = IEasyUAClientExtension2.WaitForMultipleValues(client, monitoredItemArgumentsList, maximumSeverity)

[Extension()]
[ElementsNotNull()]
[NotNull()]
public static ValueResult[] WaitForMultipleValues( 
   IEasyUAClient client,
   IReadOnlyList<UAMonitoredItemArguments> monitoredItemArgumentsList,
   UASeverity maximumSeverity
)

[Extension()]
[ElementsNotNull()]
[NotNull()]
public:
static array<ValueResult^>^ WaitForMultipleValues( 
   IEasyUAClient^ client,
   IReadOnlyList<UAMonitoredItemArguments^>^ monitoredItemArgumentsList,
   UASeverity maximumSeverity
)

Parameters

client: The client object that will perform the operation.
monitoredItemArgumentsList: List of OPC-UA monitored item arguments.
maximumSeverity: The maximum status severity of OPC-UA data to accept.

Return Value

The function returns an array of OpcLabs.BaseLib.OperationModel.ValueResult objects. The indices of elements in the output array are the same as those in the input list, .

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

IEasyUAClientExtension2 Class
IEasyUAClientExtension2 Members
Overload List

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