'Declaration
Public Function GetConditionState( _ ByVal serverDescriptor As ServerDescriptor, _ ByVal sourceDescriptor As AENodeDescriptor, _ ByVal conditionName As String, _ ByVal attributes() As Long _ ) As AEConditionState
'Usage
Dim instance As EasyAEClientCore Dim serverDescriptor As ServerDescriptor Dim sourceDescriptor As AENodeDescriptor Dim conditionName As String Dim attributes() As Long Dim value As AEConditionState value = instance.GetConditionState(serverDescriptor, sourceDescriptor, conditionName, attributes)
public AEConditionState GetConditionState( ServerDescriptor serverDescriptor, AENodeDescriptor sourceDescriptor, string conditionName, long[] attributes )
public: AEConditionState^ GetConditionState( ServerDescriptor^ serverDescriptor, AENodeDescriptor^ sourceDescriptor, String^ conditionName, array<int64>^ attributes )
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 OpcLabs.EasyOpc.ServerDescriptor.FromGuid, OpcLabs.EasyOpc.ServerDescriptor.FromString or OpcLabs.EasyOpc.ServerDescriptor.FromServerElement static method instead.
The value of this parameter cannot be
null
(Nothing
in Visual Basic). - sourceDescriptor
- Contains fully qualified source name, as returned by browsing. The state of the condition instance associated with this source is returned.
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). - conditionName
- A condition name, as returned by querying. The state of this condition is returned.
The value of this parameter cannot be
null
(Nothing
in Visual Basic). - attributes
- Specifies the event attributes to be returned.
The value of this parameter cannot be
null
(Nothing
in Visual Basic).
Return Value
This method never returns null
(Nothing
in Visual Basic).