'Declaration
<NotNullAttribute()> Function BrowseNodes( _ ByVal serverDescriptor As ServerDescriptor, _ ByVal parentNodeDescriptor As AENodeDescriptor, _ ByVal browseParameters As AEBrowseParameters _ ) As AENodeElementCollection
'Usage
Dim instance As IEasyAEClient Dim serverDescriptor As ServerDescriptor Dim parentNodeDescriptor As AENodeDescriptor Dim browseParameters As AEBrowseParameters Dim value As AENodeElementCollection value = instance.BrowseNodes(serverDescriptor, parentNodeDescriptor, browseParameters)
[NotNull()] AENodeElementCollection BrowseNodes( ServerDescriptor serverDescriptor, AENodeDescriptor parentNodeDescriptor, AEBrowseParameters browseParameters )
[NotNull()] AENodeElementCollection^ BrowseNodes( ServerDescriptor^ serverDescriptor, AENodeDescriptor^ parentNodeDescriptor, AEBrowseParameters^ browseParameters )
Parameters
- serverDescriptor
- The OPC server involved in the operation.
Because the OpcLabs.EasyOpc.ServerDescriptor has an implicit conversion from System.Guid, System.String and OpcLabs.EasyOpc.ServerElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a GUID (representing the CLSID of the server), a string (representing the so-called OPC server descriptor string, such as a ProgID or the URL of the server), or a OpcLabs.EasyOpc.ServerElement object (result from OPC browsing), in place of this parameter, and the corresponding OPC server descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromGuid, FromString or FromServerElement static method instead.
The value of this parameter cannot be
null
(Nothing
in Visual Basic). - parentNodeDescriptor
- Descriptor for the parent area to be browsed (can be the root).
Because the AENodeDescriptor has an implicit conversion from System.String and OpcLabs.EasyOpc.AlarmsAndEvents.AddressSpace.AENodeElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a string (representing the qualified name of the node), or a OpcLabs.EasyOpc.AlarmsAndEvents.AddressSpace.AENodeElement object (result from OPC browsing), in place of this parameter, and the corresponding OPC A&E node descriptor will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the AENodeDescriptor.FromString or AENodeDescriptor.FromAENodeElement static method instead.
The value of this parameter cannot be
null
(Nothing
in Visual Basic). - browseParameters
- Contains filtering conditions.
The value of this parameter cannot be
null
(Nothing
in Visual Basic).
Return Value
This method never returns null
(Nothing
in Visual Basic).
The individual elements of the returned value are never null
(Nothing
in Visual Basic).