'Declaration
 
<ExtensionAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function BrowseTree( _
   ByVal client As IEasyDAClient, _
   ByVal browseArguments As DABrowseArguments, _
   ByVal nodeElementsTransformer As Func(Of IEnumerable(Of DANodeElement),IEnumerable(Of DANodeElement)) _
) As ITreeTraversable(Of DANodeTreePosition)

'Usage
 
Dim client As IEasyDAClient
Dim browseArguments As DABrowseArguments
Dim nodeElementsTransformer As Func(Of IEnumerable(Of DANodeElement),IEnumerable(Of DANodeElement))
Dim value As ITreeTraversable(Of DANodeTreePosition)
 
value = IEasyDAClientExtension2.BrowseTree(client, browseArguments, nodeElementsTransformer)

[Extension()]
[NotNull()]
public static ITreeTraversable<DANodeTreePosition> BrowseTree( 
   IEasyDAClient client,
   DABrowseArguments browseArguments,
   Func<IEnumerable<DANodeElement>,IEnumerable<DANodeElement>> nodeElementsTransformer
)

[Extension()]
[NotNull()]
public:
static ITreeTraversable<DANodeTreePosition^>^ BrowseTree( 
   IEasyDAClient^ client,
   DABrowseArguments^ browseArguments,
   Func<IEnumerable<DANodeElement^>^,IEnumerable<DANodeElement^>^>^ nodeElementsTransformer
) 

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).

browseArguments

Holds arguments needed to browse OPC DA server nodes.

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

nodeElementsTransformer

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

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

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.DataAccess.Graphs.DANodeTreePosition object for the root is special one, in that from its OpcLabs.EasyOpc.DataAccess.AddressSpace.DANodeElement properties, only its ItemId is filled in.

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

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