OPC Studio User's Guide and Reference
UAEventFilterBuilder Constructor(UAEventFilter)



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA Namespace > UAEventFilterBuilder Class > UAEventFilterBuilder Constructor : UAEventFilterBuilder Constructor(UAEventFilter)
The event filter object to be copied from.

Because the UAEventFilter has an implicit conversion from UAAttributeFieldCollection, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use an OPC UA attribute field collection (representing the Select clauses of the event filter) in place of this parameter, and the corresponding OPC UA event filter will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromUAAttributeFieldCollection static method instead.

Also, because the UAEventFilterBuilder has an implicit conversion to UAEventFilter, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a UAEventFilterBuilder in place of this parameter, and the corresponding OPC UA event filter will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can convert a UAEventFilterBuilder to UAEventFilter using the ToUAEventFilter static method instead.

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

Initializes a new instance of the class, specifying the event filter.
Syntax
'Declaration
 
Public Function New( _
   ByVal eventFilter As UAEventFilter _
)
'Usage
 
Dim eventFilter As UAEventFilter
 
Dim instance As New UAEventFilterBuilder(eventFilter)
public UAEventFilterBuilder( 
   UAEventFilter eventFilter
)
public:
UAEventFilterBuilder( 
   UAEventFilter^ eventFilter
)

Parameters

eventFilter
The event filter object to be copied from.

Because the UAEventFilter has an implicit conversion from UAAttributeFieldCollection, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use an OPC UA attribute field collection (representing the Select clauses of the event filter) in place of this parameter, and the corresponding OPC UA event filter will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromUAAttributeFieldCollection static method instead.

Also, because the UAEventFilterBuilder has an implicit conversion to UAEventFilter, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a UAEventFilterBuilder in place of this parameter, and the corresponding OPC UA event filter will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can convert a UAEventFilterBuilder to UAEventFilter using the ToUAEventFilter static method instead.

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

Remarks
Member objects are not being cloned!
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