GetMultiplePropertyValues Method (IEasyDAClient)

Gets values of multiple OPC properties, specifying an array of property arguments objects.

Syntax

Visual Basic
C#
C++/CLI

'Declaration
 
<JetBrains.Annotations.ItemNotNullAttribute()>
<JetBrains.Annotations.MustUseReturnValueAttribute()>
<JetBrains.Annotations.NotNullAttribute()>
Function GetMultiplePropertyValues( _
   ByVal argumentsArray() As DAPropertyArguments _
) As ValueResult()

'Usage
 
Dim instance As IEasyDAClient
Dim argumentsArray() As DAPropertyArguments
Dim value() As ValueResult
 
value = instance.GetMultiplePropertyValues(argumentsArray)

[JetBrains.Annotations.ItemNotNull()]
[JetBrains.Annotations.MustUseReturnValue()]
[JetBrains.Annotations.NotNull()]
ValueResult[] GetMultiplePropertyValues( 
   DAPropertyArguments[] argumentsArray
)

[JetBrains.Annotations.ItemNotNull()]
[JetBrains.Annotations.MustUseReturnValue()]
[JetBrains.Annotations.NotNull()]
array<ValueResult^>^ GetMultiplePropertyValues( 
   array<DAPropertyArguments^>^ argumentsArray
)

Parameters

argumentsArray

Array of arguments, one element per each OPC property involved in the operation.

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

The individual elements of the parameter value cannot be null (Nothing in Visual Basic).

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 array.

This method never returns null (Nothing in Visual Basic).

The individual elements of the returned value are never null (Nothing in Visual Basic).

This return value of this method should not be ignored.

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.ObjectDisposedException	An operation was performed on a disposed object.

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.ObjectDisposedException An operation was performed on a disposed object.

Remarks

The server(s) can be local or can be remotely accessed via DCOM.

This is a multiple-operation method. In a properly written program, it does not throw any exceptions. You should therefore not put try/catch statements or similar constructs around calls to this method. The only exceptions thrown by this method are for usage errors, i.e. when your code violates the usage contract of the method, such as passing in invalid arguments or calling the method when the state of the object does not allow it. Any operation-related errors (i.e. errors that depend on external conditions that your code cannot reliably check) are indicated in the result objects returned by the method. For more information, see Multiple-operation Methods and Do not catch any exceptions with asynchronous or multiple-operation methods.

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

IEasyDAClient Interface
IEasyDAClient Members

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