OPC Studio User's Guide and Reference
Create(ServerDescriptor,AESubscriptionParameters,Boolean,Object) Method



OpcLabs.EasyOpcClassic Assembly > OpcLabs.EasyOpc.AlarmsAndEvents.Reactive Namespace > AENotificationObservable Class > Create Method : Create(ServerDescriptor,AESubscriptionParameters,Boolean,Object) Method
The OPC server involved in the operation.
Subscription parameters to be used when the subscription is created
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).
The state object (can be any value supplied by your code); available in event notifications.
Creates a new notification observable for OPC events given by the server descriptor and subscription parameters objects, and other parameters.
Syntax
'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)

Parameters

serverDescriptor
The OPC server involved in the operation.
subscriptionParameters
Subscription parameters to be used when the subscription is created
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.

Return Value

Returns an observable for notifications about given OPC events.
Remarks
The AEReactive.DefaultClientSelector selector will be used for OPC Alarms&Events operations.
Requirements

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

See Also