QuickOPC User's Guide and Reference
ListDataSetWriterLocators Method (IUAReadOnlyPubSubConfiguration)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.PubSub.Configuration Namespace > IUAReadOnlyPubSubConfiguration Interface : ListDataSetWriterLocators Method
The name of the published dataset.
An optional path to the dataset folder.
Gets the dataset writer locators for the specified published dataset.
Syntax
'Declaration
 
<ElementsNotNullAttribute()>
<NotNullAttribute()>
Function ListDataSetWriterLocators( _
   ByVal publishedDataSetName As String, _
   ByVal dataSetFolderPath As IReadOnlyList(Of String) _
) As UADataSetWriterLocator()
'Usage
 
Dim instance As IUAReadOnlyPubSubConfiguration
Dim publishedDataSetName As String
Dim dataSetFolderPath As IReadOnlyList(Of String)
Dim value() As UADataSetWriterLocator
 
value = instance.ListDataSetWriterLocators(publishedDataSetName, dataSetFolderPath)
[ElementsNotNull()]
[NotNull()]
UADataSetWriterLocator[] ListDataSetWriterLocators( 
   string publishedDataSetName,
   IReadOnlyList<string> dataSetFolderPath
)
[ElementsNotNull()]
[NotNull()]
array<UADataSetWriterLocator^>^ ListDataSetWriterLocators( 
   String^ publishedDataSetName,
   IReadOnlyList<String^>^ dataSetFolderPath
) 

Parameters

publishedDataSetName
The name of the published dataset.
dataSetFolderPath
An optional path to the dataset folder.

Return Value

Returns an array of the dataset writer locators.
Exceptions
ExceptionDescription

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.

The OPC UA operation has failed. This operation exception in uniformly used to allow common handling of various kinds of errors. The System.Exception.InnerException always contains information about the actual error cause.

This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

There is a logical error in the OPC UA operation.

This is an operation error that depends on factors external to your program, and thus cannot be always avoided. Your code must handle it appropriately.

Remarks

In this context, the dataset writer locator is a tuple consisting of

This method complements the ability to obtain UADataSetWriterElement.PublishedDataSetName from the UADataSetWriterElement returned by FindDataSetWriterElement. It would be possible to obtain the data set writer locators using other methods on IUAReadOnlyPubSubConfiguration, but it would be extremely ineffective, especially in case of OpcLabs.EasyOpc.UA.PubSub.Configuration.Implementation.UAPubSubClientConfiguration, as references (of type OpcLabs.EasyOpc.UA.AddressSpace.Standard.UAReferenceTypeIds.DataSetToWriter) exist in the address space to allow the data set writer be found easily.

Requirements

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

See Also