QuickOPC User's Guide and Reference
BrowseNodes(IEasyAEClient,String,String,String,AEBrowseParameters) Method



OpcLabs.EasyOpcClassic Assembly > OpcLabs.EasyOpc.AlarmsAndEvents Namespace > IEasyAEClientExtension Class > BrowseNodes Method : BrowseNodes(IEasyAEClient,String,String,String,AEBrowseParameters) Method
The client object that will perform the operation.
Name of the machine. Determines the computer on which the OPC server is located. May be an empty string, in which case the OPC server is assumed to exist on the local computer or at the computer specified for it by DCOM configuration.
Contains ProgID of the OPC server.
Fully qualified name of the parent area to be browsed (empty string for root)
Contains filtering conditions.
Browses the specified area (or root) in OPC server's process area space, and returns information about child nodes (areas or sources) found. Browses the specified area for child areas. Uses computer name and server class for specifying the OPC server. A parent area name is passed in.
Syntax
'Declaration
 
<ExtensionAttribute()>
<ElementsNotNullAttribute()>
<NotNullAttribute()>
Public Overloads Shared Function BrowseNodes( _
   ByVal client As IEasyAEClient, _
   ByVal machineName As String, _
   ByVal serverClass As String, _
   ByVal parentQualifiedName As String, _
   ByVal browseParameters As AEBrowseParameters _
) As AENodeElementCollection
'Usage
 
Dim client As IEasyAEClient
Dim machineName As String
Dim serverClass As String
Dim parentQualifiedName As String
Dim browseParameters As AEBrowseParameters
Dim value As AENodeElementCollection
 
value = IEasyAEClientExtension.BrowseNodes(client, machineName, serverClass, parentQualifiedName, browseParameters)

Parameters

client
The client object that will perform the operation.
machineName
Name of the machine. Determines the computer on which the OPC server is located. May be an empty string, in which case the OPC server is assumed to exist on the local computer or at the computer specified for it by DCOM configuration.
serverClass
Contains ProgID of the OPC server.
parentQualifiedName
Fully qualified name of the parent area to be browsed (empty string for root)
browseParameters
Contains filtering conditions.

Return Value

The method returns a keyed collection of OpcLabs.EasyOpc.AlarmsAndEvents.AddressSpace.AENodeElement values, each containing information about a particular node (area or source) found. The keys of the keyed collection are the names of the nodes.
Exceptions
ExceptionDescription
The OPC "Classic" (or OPC XML-DA) operation has failed.
A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.
Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2012, Windows Server 2016; .NET Core, .NET 5, .NET 6: Linux, macOS, Microsoft Windows

See Also

Reference

IEasyAEClientExtension Class
IEasyAEClientExtension Members
Overload List