'Declaration
 
<NotNullAttribute()>
Public Overloads Shared Function Create( _
   ByVal serverDescriptor As ServerDescriptor, _
   ByVal subscriptionParameters As AESubscriptionParameters, _
   Optional ByVal refreshWhenActive As Boolean, _
   Optional ByVal state As Object _
) As AENotificationObservable

'Usage
 
Dim serverDescriptor As ServerDescriptor
Dim subscriptionParameters As AESubscriptionParameters
Dim refreshWhenActive As Boolean
Dim state As Object
Dim value As AENotificationObservable
 
value = AENotificationObservable.Create(serverDescriptor, subscriptionParameters, refreshWhenActive, state)

[NotNull()]
public static AENotificationObservable Create( 
   ServerDescriptor serverDescriptor,
   AESubscriptionParameters subscriptionParameters,
   bool refreshWhenActive,
   object state
)

[NotNull()]
public:
static AENotificationObservable^ Create( 
   ServerDescriptor^ serverDescriptor,
   AESubscriptionParameters^ subscriptionParameters,
   bool refreshWhenActive,
   Object^ state
) 

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).

subscriptionParameters

Subscription parameters to be used when the subscription is created

The value of this parameter cannot be null (Nothing in Visual Basic).

refreshWhenActive

When set, the subscription will automatically perform a Refresh after each successful connection to the server (either the initial connection, or any automatic reconnection after the connection is lost).

state

The state object (can be any value supplied by your code); available in event notifications.

The value of this parameter can be null (Nothing in Visual Basic).

Return Value

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows