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



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA Namespace > UAEventFilterBuilder Class > UAEventFilterBuilder Constructor : UAEventFilterBuilder Constructor(UAContentFilterElement)
The where clause.

Because the OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElementBuilder has an implicit conversion to OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElementBuilder in place of this parameter, and the corresponding OPC UA content filter element will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can convert a OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElementBuilder to OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElement using the OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElementBuilder.ToUAContentFilterElement static method instead.

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

Initializes a new instance of the class, specifying the Where clause.
Syntax
'Declaration
 
Public Function New( _
   ByVal whereClause As UAContentFilterElement _
)
'Usage
 
Dim whereClause As UAContentFilterElement
 
Dim instance As New UAEventFilterBuilder(whereClause)
public UAEventFilterBuilder( 
   UAContentFilterElement whereClause
)
public:
UAEventFilterBuilder( 
   UAContentFilterElement^ whereClause
)

Parameters

whereClause
The where clause.

Because the OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElementBuilder has an implicit conversion to OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElement, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElementBuilder in place of this parameter, and the corresponding OPC UA content filter element will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can convert a OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElementBuilder to OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElement using the OpcLabs.EasyOpc.UA.Filtering.UAContentFilterElementBuilder.ToUAContentFilterElement static method instead.

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

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