'Declaration
<ExtensionAttribute()> <NotNullAttribute()> Public Overloads Shared Function BrowseAreas( _ ByVal client As IEasyAEClient, _ ByVal serverDescriptor As ServerDescriptor, _ ByVal parentNodeDescriptor As AENodeDescriptor _ ) As AENodeElementCollection
'Usage
Dim client As IEasyAEClient Dim serverDescriptor As ServerDescriptor Dim parentNodeDescriptor As AENodeDescriptor Dim value As AENodeElementCollection value = IEasyAEClientExtension.BrowseAreas(client, serverDescriptor, parentNodeDescriptor)
[Extension()] [NotNull()] public static AENodeElementCollection BrowseAreas( IEasyAEClient client, ServerDescriptor serverDescriptor, AENodeDescriptor parentNodeDescriptor )
[Extension()] [NotNull()] public: static AENodeElementCollection^ BrowseAreas( IEasyAEClient^ client, ServerDescriptor^ serverDescriptor, AENodeDescriptor^ parentNodeDescriptor )
Parameters
- client
- The client object that will perform the operation.
This is typically the EasyAEClient object.
The value of this parameter cannot be
null
(Nothing
in Visual Basic). - 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
- Contains fully qualified name of the parent area to be browsed (empty string for 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 FromString or FromAENodeElement static method instead.
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).