'Declaration
 
<ExtensionAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function BrowseTree( _
   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 ITreeTraversable(Of UANodeTreePosition)

'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 ITreeTraversable(Of UANodeTreePosition)
 
value = IEasyUAClientExtension2.BrowseTree(client, endpointDescriptor, nodeDescriptor, browseParameters, nodeElementsTransformer)

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

[Extension()]
[NotNull()]
public:
static ITreeTraversable<UANodeTreePosition^>^ BrowseTree( 
   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

Starting 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

If you want to enumerate through a sequence of the tree nodes, convert the result to a sequence using the OpcLabs.BaseLib.Graphs.Extensions.ITreeTraversableExtension.ToEnumerable<T> method.

The method automatically prevents recursion into nodes that have already been traversed.

The root position in a tree will correspond to the specified starting node. The OpcLabs.EasyOpc.UA.Graphs.UANodeTreePosition 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.EasyUAClientCore object.

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