'Declaration
 
<ExtensionAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function TraverseNodeTree( _
   ByVal client As IEasyUAClient, _
   ByVal endpointDescriptor As UAEndpointDescriptor, _
   ByVal nodeDescriptor As UANodeDescriptor, _
   ByVal browseParameters As UABrowseParameters, _
   ByVal nodeElementsTransformer As Func(Of IEnumerable(Of UANodeElement),IEnumerable(Of UANodeElement)) _
) As IEnumerable(Of UATreePosition)

'Usage
 
Dim client As IEasyUAClient
Dim endpointDescriptor As UAEndpointDescriptor
Dim nodeDescriptor As UANodeDescriptor
Dim browseParameters As UABrowseParameters
Dim nodeElementsTransformer As Func(Of IEnumerable(Of UANodeElement),IEnumerable(Of UANodeElement))
Dim value As IEnumerable(Of UATreePosition)
 
value = IEasyUAClientExtension2.TraverseNodeTree(client, endpointDescriptor, nodeDescriptor, browseParameters, nodeElementsTransformer)

[Extension()]
[NotNull()]
public static IEnumerable<UATreePosition> TraverseNodeTree( 
   IEasyUAClient client,
   UAEndpointDescriptor endpointDescriptor,
   UANodeDescriptor nodeDescriptor,
   UABrowseParameters browseParameters,
   Func<IEnumerable<UANodeElement>,IEnumerable<UANodeElement>> nodeElementsTransformer
)

[Extension()]
[NotNull()]
public:
static IEnumerable<UATreePosition^>^ TraverseNodeTree( 
   IEasyUAClient^ client,
   UAEndpointDescriptor^ endpointDescriptor,
   UANodeDescriptor^ nodeDescriptor,
   UABrowseParameters^ browseParameters,
   Func<IEnumerable<UANodeElement^>^,IEnumerable<UANodeElement^>^>^ nodeElementsTransformer
) 

Parameters

client

The client object that will perform the operation.

endpointDescriptor

Endpoint descriptor. Identifies the OPC-UA server.

nodeDescriptor

Node descriptor. Identifies the node in OPC server's address space.

browseParameters

Browse parameters such as node classes and reference types to be returned.

nodeElementsTransformer

Transforms a sequence of child node elements before it is used for further browsing.

Return Value

Performs a breadth-first traversal.

The root position in a tree will correspond to the specified starting node. The OpcLabs.EasyOpc.UA.Graphs.UATreePosition object for the root is special one, in that from its OpcLabs.EasyOpc.UA.AddressSpace.UANodeElement properties, only its NodeId is filled in.

You can obtain nodeDescriptor e.g. by calling one of the browsing methods on OpcLabs.EasyOpc.UA.EasyUAClient object.

Target Platforms: .NET Framework: Windows 7 with SP1, Windows Server 2012; .NET Core: Linux, Microsoft Windows

Reference

IEasyUAClientExtension2 Class
IEasyUAClientExtension2 Members
Overload List