'Declaration
 
<ExtensionAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function WaitForMultipleItemValues( _
   ByVal client As IEasyDAClient, _
   ByVal itemArgumentsList As IReadOnlyList(Of DAItemArguments), _
   ByVal groupParameters As DAGroupParameters _
) As ValueResult()

'Usage
 
Dim client As IEasyDAClient
Dim itemArgumentsList As IReadOnlyList(Of DAItemArguments)
Dim groupParameters As DAGroupParameters
Dim value() As ValueResult
 
value = IEasyDAClientExtension2.WaitForMultipleItemValues(client, itemArgumentsList, groupParameters)

[Extension()]
[NotNull()]
public static ValueResult[] WaitForMultipleItemValues( 
   IEasyDAClient client,
   IReadOnlyList<DAItemArguments> itemArgumentsList,
   DAGroupParameters groupParameters
)

[Extension()]
[NotNull()]
public:
static array<ValueResult^>^ WaitForMultipleItemValues( 
   IEasyDAClient^ client,
   IReadOnlyList<DAItemArguments^>^ itemArgumentsList,
   DAGroupParameters^ groupParameters
) 

Parameters

client

The client object that will perform the operation.

This is typically the OpcLabs.EasyOpc.DataAccess.EasyDAClient object.

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

itemArgumentsList

List of OPC-DA item arguments (each argument holds server and item descriptor).

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).

groupParameters

Contains subscription parameters, such as the requested update rate.

Because the OpcLabs.EasyOpc.DataAccess.DAGroupParameters has an implicit conversion from System.Int32, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use an integer (representing the requested update rate in milliseconds) in place of this parameter, and the corresponding OPC DA group parameters object will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the DAGroupParameters Constructor(Int32) constructor instead.

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

Return Value

This is an extension method (info: C#, VB.NET). In languages that have support for extensions methods (such as C# and VB.NET), you can use the extension method as if it were a regular method on the object that is its first parameter. In other languages (such as with Python.NET), you will call the extension as a static method, and pass it the object on which it acts as its first parameter.

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows