'Declaration
<ExtensionAttribute()> <NotNullAttribute()> Public Overloads Shared Function BrowseBranches( _ ByVal client As IEasyDAClient, _ ByVal serverDescriptor As ServerDescriptor, _ ByVal parentNodeDescriptor As DANodeDescriptor, _ ByVal elementNameFilter As String _ ) As DANodeElementCollection
'Usage
Dim client As IEasyDAClient Dim serverDescriptor As ServerDescriptor Dim parentNodeDescriptor As DANodeDescriptor Dim elementNameFilter As String Dim value As DANodeElementCollection value = IEasyDAClientExtension.BrowseBranches(client, serverDescriptor, parentNodeDescriptor, elementNameFilter)
[Extension()] [NotNull()] public static DANodeElementCollection BrowseBranches( IEasyDAClient client, ServerDescriptor serverDescriptor, DANodeDescriptor parentNodeDescriptor, string elementNameFilter )
[Extension()] [NotNull()] public: static DANodeElementCollection^ BrowseBranches( IEasyDAClient^ client, ServerDescriptor^ serverDescriptor, DANodeDescriptor^ parentNodeDescriptor, String^ elementNameFilter )
Parameters
- client
- The client object that will perform the operation.
This is typically the EasyDAClient 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
- Descriptor for the parent branch to be browsed (can be the root).
Because the DANodeDescriptor has an implicit conversion from System.String and OpcLabs.EasyOpc.DataAccess.AddressSpace.DANodeElement, 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.DataAccess.AddressSpace.DANodeElement object (result from OPC browsing), in place of this parameter, and the corresponding OPC DA 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 FromDANodeElement static method instead.
The value of this parameter cannot be
null
(Nothing
in Visual Basic). - elementNameFilter
- A wildcard string to filter the returned element names (empty string for no filtering)
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).